mirror of
https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker.git
synced 2025-04-16 14:59:11 +00:00
54c6ba7438
* Amazon Linux puts pidof under /sbin fixes https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/issues/399
508 lines
15 KiB
Bash
Executable file
508 lines
15 KiB
Bash
Executable file
#!/bin/sh
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### NGINX Bad Bot Blocker: setup script #################
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### Copyright (C) 2017 Stuart Cardall ###
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### https://github.com/itoffshore ###
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### Licensed under the terms of the GPL2 ###
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##########################################################
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WWW=/var/www
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VHOST_EXT="vhost"
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VHOST_DIR=/etc/nginx/sites-available
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BOTS_DIR=/etc/nginx/bots.d
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CONF_DIR=/etc/nginx/conf.d
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MAIN_CONF=/etc/nginx/nginx.conf
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INSTALLER=/usr/local/sbin/install-ngxblocker
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# setting Y / yes will whitelist only directories in $www
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# that look like domain.names
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DOT_NAMES="Y"
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# if you already set 'limit_conn addr' you may want to set
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# this to N / no.
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INC_DDOS="Y"
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####### end user configuration ###########################
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BOLDGREEN="\033[1m\033[32m"
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BOLDMAGENTA="\033[1m\033[35m"
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BOLDRED="\033[1m\033[31m"
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BOLDYELLOW="\033[1m\033[33m"
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BOLDWHITE="\033[1m\033[37m"
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RESET="\033[0m"
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OS=$(uname -s)
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usage() {
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local script=$(basename $0)
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cat <<EOF
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$script: SETUP Nginx Bad Bot Blocker configuration in [ $MAIN_CONF ] [ $VHOST_DIR/* ]
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Usage: $script [OPTIONS]
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[ -w ] : WWW path (default: $WWW)
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[ -e ] : Vhost file extension (default: .$VHOST_EXT)
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[ -v ] : Vhost directory (default: $VHOST_DIR)
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[ -b ] : Bot rules directory (default: $BOTS_DIR)
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[ -c ] : NGINX conf directory (default: $CONF_DIR)
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[ -m ] : NGINX main configuration (default: $MAIN_CONF)
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[ -i ] : Change installer path (default: $INSTALLER)
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[ -l ] : Manual whitelist of domain (default: none)
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[ -n ] : NO whitelist of .names only (default: $DOT_NAMES)
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[ -d ] : NO insert of DDOS rule (default: $INC_DDOS)
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[ -z ] : NO configuration of vhosts (default: configure files in $VHOST_DIR)
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[ -x ] : Actually change the files (default: don't change anything)
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[ -h ] : this help message
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Examples:
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$script -n (Whitelist all directory names in $WWW as domains: not just dot.name directories)
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$script -l domain1.com -l domain2.com (Whitelist these manual domain name args)
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$script -d (Do not insert DDOS rule: these may clash with existing 'limit_conn addr' rules)
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$script (Don't change anything: display results on stdout)
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$script -x (Change / update config files)
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EOF
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exit 0
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}
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update_paths() {
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# variables in nginx include files not currently possible
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# updates hard coded bots.d path in globalblacklist.conf
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local blacklist=$1 include_paths= dir= x=
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if ! grep "$BOTS_DIR" $blacklist 1>/dev/null; then
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if [ -d $BOTS_DIR ]; then
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printf "${BOLDGREEN}Updating bots.d path${RESET}: ${BOLDWHITE}$BOTS_DIR => $blacklist${RESET}\n"
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include_paths=$(grep -E "include /.*.conf;$" $blacklist | awk '{print $2}' | tr -d ';')
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for x in $include_paths; do
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dir=$(dirname $x)
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${SED_CMD} -i "s|$dir|$BOTS_DIR|" $blacklist
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done
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else
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printf "${BOLDRED}ERROR${RESET}: '$BOTS_DIR' does not exist => ${BOLDWHITE}running $INSTALLER${RESET}.\n"
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$INSTALL_INC
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update_paths $blacklist
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fi
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fi
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}
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check_config() {
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if [ -z "$FILE_LIST" ]; then
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printf "${BOLDGREEN}using a file extension for vhost files allows multiple domains to be included with a single directive in nginx.conf:\n\n"
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printf "${BOLDWHITE}include /etc/nginx/sites-enabled/*.$VHOST_EXT;\n\n"
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printf "${BOLDYELLOW}see command line switches below: ${BOLDGREEN}-e ${RESET}to customise the vhost file extension\n\n"
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printf "${BOLDMAGENTA}no vhost files in:${RESET} [ $VHOST_DIR/*.$VHOST_EXT ] ${BOLDWHITE}=> exiting${RESET}.\n\n"
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usage
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fi
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if [ ! -f "$MAIN_CONF" ]; then
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printf "${BOLDYELLOW}see command line switches below: ${BOLDGREEN}-m ${RESET}to customise the location of ${BOLDWHITE}nginx.conf${RESET}\n\n"
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printf "${BOLDWHITE}NGINX main configuration${RESET} [ $MAIN_CONF ] ${BOLDMAGENTA}not found ${BOLDWHITE}=> exiting${RESET}.\n\n"
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usage
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fi
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}
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find_vhosts() {
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local ans=
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FILE_LIST=$(find $VHOST_DIR \( -type f -or -type l \) -name "*.$VHOST_EXT")
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# vhost configuration can be disabled with '-z' switch
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if [ -z "$FILE_LIST" ] && [ -z "$SETUP_VHOST" ]; then
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find $VHOST_DIR -type f
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printf "\n${BOLDWHITE}Configure every file above as a vhost ? [Y/N] : "; read ans
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case "$ans" in
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y*|Y*) FILE_LIST=$(find $VHOST_DIR -type f);;
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esac
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fi
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}
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whitelist_ips() {
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local ip= conf=$BOTS_DIR/whitelist-ips.conf
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mkdir -p $BOTS_DIR
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if [ -z $(find_binary dig) ]; then
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return
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fi
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ip="$(dig +short myip.opendns.com @resolver1.opendns.com)"
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if ! grep "$ip" $conf >/dev/null 2>&1; then
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printf "\n%-17s %-15s %-s\n" "Whitelisting ip:" "$ip" "=> $conf"
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if [ "$DRY_RUN" = "N" ]; then
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printf "%-23s %-s\n" "$ip" "0;" >> $conf
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fi
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fi
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}
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whitelist_domains() {
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local domain_list= domain= domain_len=
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local conf=$BOTS_DIR/whitelist-domains.conf
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case "$DOT_NAMES" in
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y*|Y*) domain_list=$(find $WWW -mindepth 1 -maxdepth 1 -type d -name '*\.*' -exec basename {} \;);;
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*) domain_list=$(find $WWW -mindepth 1 -maxdepth 1 -type d -exec basename {} \;);;
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esac
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domain_len=$(find $WWW -mindepth 1 -maxdepth 1 -type d -exec basename {} \; \
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| awk '{ print length ($0) }' | sort -nr | head -1)
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whitelist_print Auto $domain_len $domain_list
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}
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whitelist_manual_domains() {
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local x= domain= domain_len=0
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local conf=$BOTS_DIR/whitelist-domains.conf
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for domain in $DOMAINS; do
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x=$(echo $domain | wc -m)
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if [ $x -gt $domain_len ]; then
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domain_len=$x
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fi
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done
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whitelist_print Manual $domain_len $DOMAINS
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}
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whitelist_print() {
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local type=$1 domain= domain_len=$2 domain_list="$(echo $@ | cut -f3- -d ' ')"
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local conf=$BOTS_DIR/whitelist-domains.conf
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for domain in $domain_list; do
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if ! grep "$domain" $conf >/dev/null 2>&1; then
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printf "%-s %-$(( $domain_len +2))s %s\n" "$type Whitelist:" "$domain" "=> $conf"
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if [ "$DRY_RUN" = "N" ]; then
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printf "%-$(( $domain_len +8))s %s\n" "\"~*$domain\"" "0;" >> $conf
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fi
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fi
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done
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}
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longest_str() {
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echo $@ | tr " " "\n" | awk '{print length ($0)}' | sort -nr | head -n1
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}
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check_wildcard() {
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local file=$1 dir=$(basename $2)
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local check="$(grep -E "^[^#]+include[[:alnum:] /]+$dir/\*" $file)"
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echo $check
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}
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add_includes() {
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local ph='<<!!>>' line=$1 file=$2 conf_dir=$3 col_size=$4 text= update=
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local include_list="$(echo $@ | awk '{$1=$2=$3=$4=""}sub("^"OFS"+","")')"
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for text in $include_list; do
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if ! grep "$text" $file 1>/dev/null; then
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update='true'
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text="include $conf_dir/$text;"
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printf "%-10s %-${col_size}s %s\n" "inserting:" "$text" "=> $file"
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if [ "$DRY_RUN" = "N" ]; then
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# $ph is just a placeholder so sed inserts a \t (tab)
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${SED_CMD} -i "$line i $ph \t$text $ph" $file
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fi
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fi
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done
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if [ "$DRY_RUN" = "N" ]; then
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if [ -n "$update" ]; then
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#add blank line below inserts
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line=$(( $line + $(echo $include_list | wc -w) ))
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if ! ${SED_CMD} -n "${line}p" $file | grep ^'}' 1>/dev/null; then
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text="include $conf_dir/$(echo $include_list | awk '{print $1}');"
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${SED_CMD} -i "s|$text|$text\n|" $file
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fi
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#add comment above inserts
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text="include $conf_dir/$(echo $include_list | awk '{print $NF}');"
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${SED_CMD} -i "s|$text|\n\n ##\n # Nginx Bad Bot Blocker Includes\n # REPO: https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker\n ##\n\t$text|" $file
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# remove placeholders
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${SED_CMD} -i "s|$ph||g" $file
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fi
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fi
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}
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find_line() {
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local file=$1 find_str=$2 first_last=$3
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case "$first_last" in
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# ignore file #comments
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first) awk "/$find_str/{ print NR; exit }" $file;;
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last) awk "/$find_str/{ print NR }" $file | tail -n1;;
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esac
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}
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find_includes() {
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local file=$1 search=$2 search_first_last=$3 line= tmp=$(mktemp)
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local start_range=$4 start_first_last=$5
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local end_range=$6 end_first_last=$7
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local start=$(find_line $file $start_range $start_first_last)
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local end=$(find_line $file $end_range $end_first_last)
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if [ -n "$start" ] && [ -n "$end" ]; then
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${SED_CMD} -n "$start,$end"p $file > $tmp
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line=$(find_line $tmp $search $search_first_last)
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rm -f $tmp
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fi
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# search string not found
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if [ -z "$line" ]; then
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line=1
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fi
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case "$search_first_last" in
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first) line=$(( $line + $start -1 ));;
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last) line=$(( $line + $start +1 ));;
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esac
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# if inserting beyond the end of the stanza
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if [ "$(${SED_CMD} -n $(( $line - 1))p $file | grep ^})" = "}" ]; then
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# insert blank line
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${SED_CMD} -i "$(( line - 1)) i \ " $file
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fi
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echo $line
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}
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sanitize_path() {
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echo $1 |tr -cd '[:alnum:] [=@=] [=.=] [=-=] [=/=] [=_=]' \
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|tr -s '@.-/_' |awk '{print tolower($0)}'
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}
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sanitize_ext() {
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echo $1 |tr -cd '[:alnum:]' |awk '{print tolower($0)}'
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}
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check_args() {
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local option=$1 type=$2 arg=$3
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local msg="ERROR: option '-$option' argument '$arg' requires:"
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case "$type" in
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path) if ! echo $arg | grep ^/ 1>/dev/null; then
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printf "$msg absolute path.\n"
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exit 1
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fi
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;;
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script) if [ ! -x $arg ]; then
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printf "$msg '$arg' is not executable / does not exist.\n"
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exit 1
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fi
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;;
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none) printf "$msg argument.\n"; exit 1;;
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esac
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}
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find_binary() {
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local x= path= binary=$1 bin_paths='/bin /usr/bin /usr/local/bin /sbin /usr/sbin /usr/local/sbin /root/bin /root/.bin'
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for x in $bin_paths; do
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path="$x/$binary"
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if [ -x $path ]; then
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echo $path
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return
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fi
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done
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}
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check_depends() {
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# centos does not have which by default
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if [ -z $(find_binary curl) ]; then
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printf "${BOLDRED}ERROR${RESET}: $0 requires: 'curl' => ${BOLDWHITE}cannot check remote version.${RESET}\n"
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exit 1
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fi
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case $OS in
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Linux)
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SED_CMD=$(find_binary sed)
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if [ -z ${SED_CMD} ]; then
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printf "${BOLDRED}ERROR${RESET}: $0 requires: 'sed' => ${BOLDWHITE}please install sed.${RESET}\n"
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exit 1
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fi
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;;
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*BSD)
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SED_CMD=$(find_binary gsed)
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if [ -z ${SED_CMD} ]; then
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printf "${BOLDRED}ERROR${RESET}: $0 requires: 'gsed' => ${BOLDWHITE}please install textproc/gsed.${RESET}\n"
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exit 1
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fi
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;;
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esac
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# required for whitelisting public ip
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if [ -z $(find_binary dig) ]; then
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printf "${BOLDYELLOW}WARN${RESET}: $0 optionally requires: 'dig' => ${BOLDWHITE}cannot whitelist public ip address.${RESET}\n"
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fi
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# install-ngxblocker downloads missing scripts / includes as part of the update process
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if [ ! -x $INSTALLER ]; then
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printf "${BOLDRED}ERROR${RESET}: $0 requires: '$INSTALLER' => ${BOLDWHITE}cannot update includes.${RESET}\n"
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exit 1
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fi
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}
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check_nginx_directives() {
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# avoid directive conflicts with nginx.conf
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local x= bot_config="$CONF_DIR"/botblocker-nginx-settings.conf
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# directives sourced from include_filelist.txt
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for x in $NGINX_DIRECTIVES; do
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if grep -E "(^$x|^[[:space:]]+$x)" 1>/dev/null $MAIN_CONF; then
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printf "${BOLDYELLOW}setup will fix conflict from: '$x' in $bot_config${RESET}\n"
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if [ "$DRY_RUN" = "N" ]; then
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printf "${BOLDRED}disabling '$x' in: $bot_config${RESET}\n"
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${SED_CMD} -i "s/$x/#$x/g" $bot_config | grep $x
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printf " ${BOLDGREEN}disabled OK${RESET}\n\n"
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fi
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fi
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done
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}
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get_options() {
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local arg= opts=
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while getopts :w:l:e:v:b:c:m:i:ndxzh opts "$@"
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do
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if [ -n "${OPTARG}" ]; then
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case "$opts" in
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e) arg=$(sanitize_ext ${OPTARG});;
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*) arg=$(sanitize_path ${OPTARG});;
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esac
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fi
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case "$opts" in
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w) WWW=$arg; check_args $opts path $arg ;;
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l) DOMAINS="$DOMAINS $arg" ;;
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e) VHOST_EXT=$arg;;
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v) VHOST_DIR=$arg; check_args $opts path $arg ;;
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b) BOTS_DIR=$arg; check_args $opts path $arg ;;
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c) CONF_DIR=$arg; check_args $opts path $arg ;;
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m) MAIN_CONF=$arg; check_args $opts path $arg ;;
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i) INSTALLER=$arg; check_args $opts script $arg ;;
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n) DOT_NAMES=N ;;
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d) INC_DDOS=N ;;
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x) DRY_RUN=N ;;
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z) SETUP_VHOST=N ;;
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h) usage ;;
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\?) usage ;;
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:) check_args $OPTARG none none ;;
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esac
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done
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INSTALL_INC="$INSTALLER -b $BOTS_DIR -c $CONF_DIR -x"
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}
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check_online() {
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local url=$1
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local response_code=$(curl -o /dev/null --silent --head --write-out '%{http_code}' $url)
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if [ "$response_code" = "200" ]; then
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echo "true"
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fi
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}
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main() {
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local include_url= file= line= col_size= blacklist=
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local CONF_FILES= VHOST_INCLUDES=
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local REPO=https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master
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# require root
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if [ "$(id -u)" != "0" ]; then
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echo "This script must be run as root" 1>&2
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exit 1
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fi
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# parse command line
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get_options $@
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check_depends
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# check vhosts
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find_vhosts
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check_config
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# check repo is online & source includes
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include_url=$REPO/include_filelist.txt
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printf "Checking url: $include_url\n"
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if [ -n "$(check_online $include_url)" ]; then
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local tmp=$(mktemp)
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curl -s -o $tmp $include_url
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# use period not source in POSIX shell
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. $tmp 2>/dev/null
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rm -f $tmp
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else
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printf "Repo down or missing: $include_url\n"
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exit 1
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fi
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# double check we have some files sourced
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if [ -z "$CONF_FILES" ] || [ -z "$VHOST_INCLUDES" ]; then
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printf "Error sourcing variables from: $include_url\n"
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exit 1
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fi
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# configure ddos include
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case "$INC_DDOS" in
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n*|N*) VHOST_INCLUDES=$(echo $VHOST_INCLUDES | ${SED_CMD} 's|ddos.conf||');;
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esac
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# by default do not change any files
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if [ -z "$DRY_RUN" ]; then
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printf "\n** Dry Run ** | not updating files | run as '$(basename $0) -x' to setup files.\n\n"
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else
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printf "\n"
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fi
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# calculate column size for better message printing
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col_size=$(( $(longest_str $CONF_FILES) + $(echo $CONF_DIR | wc -m) + 10 ))
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# update main config
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#line=$(find_includes $MAIN_CONF include last http first '\}' last )
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line=$(find_includes $MAIN_CONF sendfile last http first '\}' last )
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if [ -n "$(check_wildcard $MAIN_CONF $CONF_DIR)" ]; then # also recalculate column width
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col_size=$(( $(longest_str $VHOST_INCLUDES) + $(echo $BOTS_DIR | wc -m) + 10 ))
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printf "%-10s %-${col_size}s %s\n" "INFO:" "$CONF_DIR/* detected" "=> $MAIN_CONF"
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else # wildcard conf.d ok in nginx.conf
|
|
add_includes $line $MAIN_CONF $CONF_DIR $col_size $CONF_FILES
|
|
fi
|
|
|
|
# update vhosts
|
|
for file in $FILE_LIST; do
|
|
line=$(find_includes $file include last server_ last location first )
|
|
|
|
if [ -n "$(check_wildcard $file $BOTS_DIR)" ]; then
|
|
# do not use wildcards in vhost files
|
|
printf "%-10s %-${col_size}s %s\n" "WARN:" "$BOTS_DIR/* detected" "=> $file"
|
|
else # do not add includes to vhosts without root directive (i.e redirects)
|
|
if grep -Ew ^[[:space:]]+root $file 1>/dev/null; then
|
|
add_includes $line $file $BOTS_DIR $col_size $VHOST_INCLUDES
|
|
fi
|
|
fi
|
|
done
|
|
|
|
# check nginx.conf for settings that clash
|
|
check_nginx_directives
|
|
|
|
# whitelisting
|
|
whitelist_ips
|
|
|
|
if [ -d $WWW ]; then
|
|
whitelist_domains
|
|
else
|
|
printf "\nWeb directory not found ('$WWW'): not automatically whitelisting domains.\n"
|
|
fi
|
|
|
|
if [ -n "$DOMAINS" ]; then
|
|
whitelist_manual_domains
|
|
fi
|
|
|
|
# download new bots.d / conf.d files
|
|
printf "\nChecking for missing includes:\n\n"
|
|
$INSTALL_INC
|
|
blacklist=$(find $CONF_DIR -type f -name globalblacklist.conf)
|
|
# set custom bots.d path
|
|
update_paths $blacklist
|
|
}
|
|
|
|
## START ##
|
|
main $@
|
|
exit $?
|