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Record your dynamic WAN IP addresses

to shell osx mac curl launchd bash ip address dynamic record wan dsl router by jvs on Oct 15, 2008

A launchd + shell script exercise to record your DSL router's dynamic WAN IP addresses. Requires some customization on your part. Use at your own risk.

1. create the laund item in /Library/LaunchDaemons

# yourname=$(/usr/bin/logname)
/usr/bin/sudo /usr/bin/nano /Library/LaunchDaemons/net.$(/usr/bin/logname).wanip.update.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Disabled</key>
	<true/>
	<key>GroupName</key>
	<string>yourname</string>
	<key>Label</key>
	<string>net.yourname.wanip.update</string>
	<key>ProgramArguments</key>
	<array>
		<string>/Users/yourname/Library/wanip.sh</string>
	</array>
	<key>RunAtLoad</key>
	<true/>
	<key>StartInterval</key>
	<integer>20</integer>
	<key>UserName</key>
	<string>yourname</string>
</dict>
</plist>


#-------------------------


/usr/bin/groups
/usr/bin/sudo /usr/sbin/chown root:wheel /Library/LaunchDaemons/net.yourname.wanip.update.plist
#/usr/bin/sudo /usr/sbin/chown root:admin /Library/LaunchDaemons/net.yourname.wanip.update.plist
/usr/bin/sudo /bin/chmod 0644 /Library/LaunchDaemons/net.yourname.wanip.update.plist

# after creating ~/Library/wanip.sh below
/usr/bin/sudo /bin/launchctl load -w /Library/LaunchDaemons/net.yourname.wanip.update.plist 2>/dev/null
#/usr/bin/sudo /bin/launchctl unload -w /Library/LaunchDaemons/net.yourname.wanip.update.plist 2>/dev/null

/usr/bin/sudo /bin/launchctl list
/usr/bin/sudo /usr/bin/fs_usage  | /usr/bin/egrep -i wanip

2. create a shell script that will be run by the launchd item at the specified intervals in seconds (here: every 20 seconds)

#!/bin/sh

# cat ~/Library/wanip.sh   (/Users/yourname/Library/wanip.sh)
# /usr/sbin/chown $(/usr/bin/logname):$(/usr/bin/logname) ~/Library/wanip.sh
# /bin/chmod 0744 ~/Library/wanip.sh

# write stdout & stderr to console.log in /Library/Logs/Console/
exec >/dev/console 2>&1   

declare last_line_closed last_line_offline newfile old_wanip time wanip

declare IF='en0'
declare wanip_record_file="${HOME}/Library/wanip_record.txt"

# try to find your router_wanip_site by surfing to the IP addresses returned by the following commands:
# route -n get default | egrep interface | awk '{print $NF}'
# ipconfig getoption en0 router
# ipconfig getoption en0 domain_name_server

declare router_wanip_site='http://xxxx.xx/xxx.htm'
#declare router_wanip_site='http://checkip.dyndns.org'   # alternative


/bin/sleep 3

/usr/sbin/ipconfig waitall

if [[ "$(/sbin/route -n get default | /usr/bin/egrep interface | /usr/bin/awk '{print $NF}')" == "${IF}" ]]; then

   /usr/bin/curl -I -L -s --max-time 10 "${router_wanip_site}" 1>/dev/null
   if [[ $? -ne 0 ]]; then exit 0; fi

   # match first IP address with egrep
   wanip="$(/usr/bin/curl -L -s --max-time 10 "${router_wanip_site}" | \
              /usr/bin/egrep -o -m 1 ' ([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}')"
   if [[ $? -ne 0 ]]; then exit 0; fi   
   wanip="${wanip// /}"

   # alternative with sed for matching a line with a characteristic string plus IP address
   #wanip="$(/usr/bin/curl -L -s --max-time 10 "${router_wanip_site}" | \
              #/usr/bin/sed -E -n -e '/STRING: /{s/^.+ ([[:digit:]\.]+).*$/\1/p;q;}')"
   #if [[ $? -ne 0 ]]; then exit 0; fi   


   time="$(/bin/date +%Y-%m-%d-%H.%M.%S-%Z)"

   if [[ -n "${wanip}" ]]; then 
      old_wanip="$(/usr/bin/sed -E -n -e '$,$s/^.+ ([[:digit:]\.]+).*$/\1/p' "${wanip_record_file}")"
      if [[ "${wanip}" == "${old_wanip}" ]]; then exit 0; fi
      echo "${time}          ${wanip}" >> "${wanip_record_file}"
   else
      last_line_closed="$(/usr/bin/sed -E -n -e '$,$s/^.+ (closed).*$/\1/p' "${wanip_record_file}")"
      if [[ -n "${last_line_closed}" ]]; then exit 0; fi
      echo "${time}          connection closed" >> "${wanip_record_file}"
   fi

else

   last_line_offline="$(/usr/bin/sed -E -n -e '$,$s/^.+ (offline).*$/\1/p' "${wanip_record_file}")"
   if [[ -n "$last_line_offline" ]]; then exit 0; fi
   time="$(/bin/date +%Y-%m-%d-%H.%M.%S-%Z)"
   echo "${time}          offline" >> "${wanip_record_file}"

fi

if [[ $(/usr/bin/stat -f %z "${wanip_record_file}") -gt 31457280 ]]; then
   newfile="${wanip_record_file}-$(/bin/date +%Y-%m-%d-%H.%M.%S-%Z)"
   /bin/mv "${wanip_record_file}" "${newfile}"
fi

exit 0

File upload with curl & AppleScript

to shell osx mac curl bash unix applescript ftp upload by jvs on Oct 14, 2008

upload a file by using curl + AppleScript

man curl 2>/dev/null | less -p '-T/--upload-file'
tell application "Finder" to do shell script "curl -T ~/resume.doc ftp://username:password@ftp.myserver.com/resume.doc"

Ping a port with hping3

to shell osx mac bash ping unix network web port ipfw internet hping hping3 by jvs on Oct 14, 2008

# cf. http://trac.macports.org/wiki/InstallingMacPorts
/opt/local/bin/port info hping3
/usr/bin/sudo /opt/local/bin/port install hping3

hping3 --help


# Terminal window 1
alias sudo=/usr/bin/sudo
alias tcpdump=/usr/sbin/tcpdump
#sudo tcpdump -s0 -xX -i lo0 port 4678 and host localhost
sudo tcpdump -s0 -vvv -i lo0 port 4678 and host localhost


# Terminal window 2
alias sudo=/usr/bin/sudo
alias hping3=/opt/local/sbin/hping3
sudo hping3 -I lo0 -s 4678 -c 1 localhost -p 4678
sudo hping3 -S -I lo0 -d 995 -s 4678 -c 1 localhost -p 4678
sudo hping3 -SA -I lo0 -d 995 -w 200 -s 4678 -c 1 localhost -p 4678
sudo hping3 -SA -M 3000 -I lo0 -d 995 -w 65 -s 4678 -c 1 localhost -p 4678
sudo hping3 -DV -SA -I lo0 -s 4678 -a 192.168.1.100 -c 1 localhost -p 4678


#----------------------------------------


# some corresponding ipfw rules for testing purposes 
# (just place them at the beginning of your ipfw rule set)

# not me to me & me to not me
/sbin/ipfw -q add count log all from not me to me 4678 in
/sbin/ipfw -q add count log all from me to not me 4678 out

# any to me & me to any
/sbin/ipfw -q add count log all from any to me 4678 in
/sbin/ipfw -q add count log all from me to any 4678 out
    
# any to any
/sbin/ipfw -q add count log all from any to any 4678

Analyze internet traffic volume with dynamic ipfw rules

to shell osx mac bash unix dynamic web ipfw internet traffic volume rule by jvs on Oct 11, 2008

# cf. Example ipfw ruleset, http://codesnippets.joyent.com/posts/show/1267
# cf. also http://codesnippets.joyent.com/posts/show/1729

man ipfw 2>/dev/null | less -p "If the ruleset"
man ipfw 2>/dev/null | less -p "These dynamic rules"
man ipfw 2>/dev/null | less -p "All rules"

man ipfw 2>/dev/null | less -p "STATEFUL FIREWALL"     # press [n]
man ipfw 2>/dev/null | less -p "SYSCTL VARIABLES"
man ipfw 2>/dev/null | less -p "EXAMPLES"
man ipfw 2>/dev/null | less -p "DYNAMIC RULES"

/usr/bin/sudo /sbin/ipfw -d -e -t list
/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/sed -E -n -e '1,/^## Dynamic rules/p'
/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/sed -E -n -e '/^## Dynamic rules/,$p'
/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/awk '/^## Dynamic rules/,/^$/ {print $0}'
/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/awk '/<->/ {print $0}'
/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/awk '{ if ( $0 ~ /<->/ ) {print $0}}'

/usr/bin/sudo /sbin/ipfw -d -e -t list | grep RULENUM
/usr/bin/sudo /sbin/ipfw -d -e -t list | grep IPADDR

/usr/sbin/sysctl -a | egrep 'tcp'
/usr/sbin/sysctl -a | egrep 'net.inet'
/usr/sbin/sysctl -a | egrep '\.fw'
/usr/sbin/sysctl -a | egrep 'ip.fw'
/usr/sbin/sysctl -a | egrep 'li[fv]e'
/usr/sbin/sysctl -a | egrep 'ip.fw.+life'

/usr/sbin/sysctl -n net.inet.tcp.always_keepalive
/usr/sbin/sysctl -n net.inet.ip.fw.dyn_keepalive
/usr/sbin/sysctl -n net.inet.ip.fw.dyn_buckets
/usr/sbin/sysctl -n net.inet.ip.fw.dyn_count
/usr/sbin/sysctl -n net.inet.ip.fw.dyn_max


# list all dynamic ipfw rules

function ipfwtraffic() {

   declare args argsregex bytes megabytes

   if [[ $# -eq 0 ]]; then

      /usr/bin/sudo /sbin/ipfw -d -e -t list | \
         /usr/bin/awk '/<->/ {printf "%-10s %-10s %-20s %-10s %-20s %-10s %-10s\n", $3, $6, $7, $8, $10, $11, $1}' | \
         /usr/bin/sort -bu | while IFS=" " read  bytes proto ipnum1 port1 ipnum2 port2 rulenum; do

      # byte
      #bytes=$(printf "%s\n" "${bytes}" | /usr/bin/awk '{ total = total + $1 } END { print total }')
      #printf "\e[1mbytes\e[m: %-17s %-10s %-40s \e[1mrule\e[m: %-15s \e[1mports\e[m: %-15s\n" \
           #"${bytes}" "${proto}" "${ipnum1}  ::  ${ipnum2}" "${rulenum}" "${port1}  ${port2}"

      # mega byte
      megabytes=$(printf "%s\n" "${bytes}" | /usr/bin/awk '{ total = (total + $1) / (1024*1024.0) } END { print total }')
      printf "\e[1mmbytes\e[m: %-17s %-10s %-40s \e[1mrule\e[m: %-15s \e[1mports\e[m: %-15s\n" \
           "${megabytes}" "${proto}" "${ipnum1}  ::  ${ipnum2}" "${rulenum}" "${port1}  ${port2}"

      #done | /usr/bin/sort -rn -k 2,2
      done | /usr/bin/sort -rn -k 2,2 | egrep -v '^[^ ]+ +[^ ]+e[^ ]+'

   else

      args="${@}"
      if [[ "${args}" != "${args//[^. [:digit:]]/}" ]]; then 
         printf "%s\n" 'Found at least one invalid rule number or IP address!'
         return 1
      fi

      if [[ "${args//[ [:digit:]]/}" == '' ]]; then 
         argsregex="^0*(${args// /|})"    #  ipfw rule numbers 
      else
         argsregex="(${args// /|})"    #  IP addresses
      fi
    
      #echo $argsregex

      /usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
         /usr/bin/awk '/<->/ {printf "%-10s %-10s %-20s %-10s %-20s %-10s %-10s\n", $3, $6, $7, $8, $10, $11, $1}' | \
         /usr/bin/sort -bu | while IFS=" " read  bytes proto ipnum1 port1 ipnum2 port2 rulenum; do

      # byte
      #bytes=$(printf "%s\n" "${bytes}" | /usr/bin/awk '{ total = total + $1 } END { print total }')
      #printf "\e[1mbytes\e[m: %-17s %-10s %-40s \e[1mrule\e[m: %-15s \e[1mports\e[m: %-15s\n" \
           #"${bytes}" "${proto}" "${ipnum1}  ::  ${ipnum2}" "${rulenum}" "${port1}  ${port2}"

      # mega byte
      megabytes=$(printf "%s\n" "${bytes}" | /usr/bin/awk '{ total = (total + $1) / (1024*1024.0) } END { print total }')
      printf "\e[1mmbytes\e[m: %-17s %-10s %-40s \e[1mrule\e[m: %-15s \e[1mports\e[m: %-15s\n" \
           "${megabytes}" "${proto}" "${ipnum1}  ::  ${ipnum2}" "${rulenum}" "${port1}  ${port2}"

      #done | /usr/bin/sort -rn -k 2,2
      done | /usr/bin/sort -rn -k 2,2 | egrep -v '^[^ ]+ +[^ ]+e[^ ]+'

   fi

   return 0
}



# usage:
# ipfwtraffic
# ipfwtraffic [rulenum1] [rulenum2] [rulenum3] ...
# ipfwtraffic [ipaddr1] [ipaddr2] [ipaddr3] ...


ipfwtraffic
ipfwtraffic  9600 10600 11000
ipfwtraffic xx.xxx.xx.xxx xx.xxx.xx.xx

ipfwtraffic | grep 'xx.xxx.xx.xx'



#------------------------------------------------------------------------------



# summarize pairs of IP addresses

function ipfwdynstats() {

   declare args argsregex dynrules ipaddr_pairs

   OIFS=${IFS}
   IFS=$'\n'

   if [[ $# -eq 0 ]]; then

      ipaddr_pairs=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/awk '/<->/ {print $7, $10}' | /usr/bin/sort -bu))
      dynrules=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/awk '/<->/ {print $7, $8, $10, $11, $6, $2, $3, $1}' | /usr/bin/sort -bu))

   else

      args="${@}"
      if [[ "${args}" != "${args//[^. [:digit:]]/}" ]]; then 
         printf "%s\n" 'Found at least one invalid rule number or IP address!'
         return 1
      fi

      if [[ "${args//[ [:digit:]]/}" == '' ]]; then 
         argsregex="^0*(${args// /|})"    #  ipfw rule numbers 
      else
         argsregex="(${args// /|})"    #  IP addresses
      fi
    
      #echo $argsregex

      ipaddr_pairs=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
           /usr/bin/awk '/<->/ {print $7, $10}' | /usr/bin/sort -bu))
      dynrules=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
           /usr/bin/awk '/<->/ {print $7, $8, $10, $11, $6, $2, $3, $1}' | /usr/bin/sort -bu))

   fi


for ((i=0; i < "${#ipaddr_pairs[@]}"; i++)); do 

   # byte
   #bytesum=$(printf "%s\n" "${dynrules[@]}" | \
        #/usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$7 }" | \
        #/usr/bin/awk '{ total = total + $1 } END { print total }')

   # mega byte
   bytesum=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$7 }" | \
        /usr/bin/awk '{ total = (total + $1) / (1024*1024.0) } END { print total }')

   proto=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$5 }" | \
        /usr/bin/sort -bu)

   rule=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$NF }" | \
        /usr/bin/sort -bu)

   ports=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$2, \$4 }" | \
        /usr/bin/sort -bu)

   # byte
   #printf "%-15s %-10s %-40s %-30s \e[1m%-30s\e[m\n" \
        #"bytes: ${bytesum}" "${proto//[[:cntrl:]]/, }" "${ipaddr_pairs[${i}]% *}  ::  ${ipaddr_pairs[${i}]#* }" \
        #"rules: ${rule//[[:cntrl:]]/, }" "ports: ${ports//[[:cntrl:]]/, }"

   # mega byte
   printf "\e[1mmbytes\e[m: %-15s %-10s %-40s \e[1mrules\e[m: %-25s \e[1mports\e[m: %-30s\n" \
        "${bytesum}" "${proto//[[:cntrl:]]/, }" "${ipaddr_pairs[${i}]% *}  ::  ${ipaddr_pairs[${i}]#* }" \
        "${rule//[[:cntrl:]]/, }" "${ports//[[:cntrl:]]/, }"

#done | /usr/bin/sort -rn -k 2,2
done | /usr/bin/sort -rn -k 2,2 | /usr/bin/egrep -v '^[^ ]+ +[^ ]+e[^ ]+'

   export IFS=${OIFS}
   return 0
}

# usage:
# ipfwdynstats
# ipfwdynstats [rulenum1] [rulenum2] [rulenum3] ...
# ipfwdynstats [ipaddr1] [ipaddr2] [ipaddr3] ...


ipfwdynstats
ipfwdynstats  5200 12700
ipfwdynstats xx.xxx.xx.xxx xxx.xxx.xx.xxx



#------------------------------------------------------------------------------



# list port-specific internet traffic

function porttraffic() {

   declare args argsregex dynrules ipaddr_pairs

   OIFS=${IFS}
   IFS=$'\n'

   if [[ $# -eq 0 ]]; then
   
      printf "%s\n" 'No port number given!'
      return 1
   
   elif [[ $# -eq 1 ]]; then

      ipaddr_pairs=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && ( \$8 == "${1}" || \$11 == "${1}" ) ) {print \$7, \$10 }}" | /usr/bin/sort -bu))

      dynrules=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && ( \$8 == "${1}" || \$11 == "${1}" ) ) {print \$7, \$8, \$10, \$11, \$6, \$2, \$3, \$1} }" | \
         /usr/bin/sort -bu))

   else

      args="${@:2}"   # all arguments starting with the second
      if [[ "${args}" != "${args//[^. [:digit:]]/}" ]]; then 
         printf "%s\n" 'Found at least one invalid rule number or IP address!'
         return 1
      fi

      if [[ "${args//[ [:digit:]]/}" == '' ]]; then 
         argsregex="^0*(${args// /|})"    #  ipfw rule numbers 
      else
         argsregex="(${args// /|})"    #  IP addresses
      fi
    
      #echo $argsregex

      ipaddr_pairs=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && ( \$8 == "${1}" || \$11 == "${1}" ) ) {print \$7, \$10 }}" | /usr/bin/sort -bu))


      dynrules=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && ( \$8 == "${1}" || \$11 == "${1}" ) ) {print \$7, \$8, \$10, \$11, \$6, \$2, \$3, \$1}}" | \
         /usr/bin/sort -bu))

   fi


for ((i=0; i < "${#ipaddr_pairs[@]}"; i++)); do 

   # byte
   #bytesum=$(printf "%s\n" "${dynrules[@]}" | \
        #/usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$7 }" | \
        #/usr/bin/awk '{ total = total + $1 } END { print total }')

   # mega byte
   bytesum=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$7 }" | \
        /usr/bin/awk '{ total = (total + $1) / (1024*1024.0) } END { print total }')

   proto=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$5 }" | \
        /usr/bin/sort -bu)

   rule=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$NF }" | \
        /usr/bin/sort -bu)

   ports=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$2, \$4 }" | \
        /usr/bin/sort -bu)

   # byte
   #printf "%-15s %-10s %-40s %-30s \e[1m%-30s\e[m\n" \
        #"bytes: ${bytesum}" "${proto//[[:cntrl:]]/, }" "${ipaddr_pairs[${i}]% *}  ::  ${ipaddr_pairs[${i}]#* }" \
        #"rules: ${rule//[[:cntrl:]]/, }" "ports: ${ports//[[:cntrl:]]/, }"

   # mega byte
   printf "\e[1mmbytes\e[m: %-15s %-10s %-40s \e[1mrules\e[m: %-25s \e[1mports\e[m: %-30s\n" \
        "${bytesum}" "${proto//[[:cntrl:]]/, }" "${ipaddr_pairs[${i}]% *}  ::  ${ipaddr_pairs[${i}]#* }" \
        "${rule//[[:cntrl:]]/, }" "${ports//[[:cntrl:]]/, }"

#done | /usr/bin/sort -rn -k 2,2
done | /usr/bin/sort -rn -k 2,2 | /usr/bin/egrep -v '^[^ ]+ +[^ ]+e[^ ]+'

   export IFS=${OIFS}
   return 0
}


# usage:
# porttraffic [portnum]
# porttraffic [portnum] [rulenum1] [rulenum2] [rulenum3] ...
# porttraffic [portnum] [ipaddr1] [ipaddr2] [ipaddr3] ...


porttraffic 80
porttraffic 80 5200 12700 7100
porttraffic 80 xx.xxx.xx.xxx xxx.xxx.xx.xxx



#------------------------------------------------------------------------------



# list rule-specific internet traffic

function ruletraffic() {

   declare args argsregex dynrules ipaddr_pairs

   OIFS=${IFS}
   IFS=$'\n'

   if [[ $# -eq 0 ]]; then
   
      printf "%s\n" 'No rule number given!'
      return 1
   
   elif [[ $# -eq 1 ]]; then

      ipaddr_pairs=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && \$1 == "${1}" ) {print \$7, \$10 }}" | /usr/bin/sort -bu))

      dynrules=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && \$1 == "${1}" ) {print \$7, \$8, \$10, \$11, \$6, \$2, \$3, \$1} }" | \
         /usr/bin/sort -bu))

   else

      args="${@:2}"   # all arguments starting with the second
      if [[ "${args}" != "${args//[^. [:digit:]]/}" ]]; then 
         printf "%s\n" 'Found at least one invalid rule number or IP address!'
         return 1
      fi

      if [[ "${args//[ [:digit:]]/}" == '' ]]; then 
         argsregex="^0*(${args// /|})"    #  ipfw rule numbers 
      else
         argsregex="(${args// /|})"    #  IP addresses
      fi
    
      #echo $argsregex

      ipaddr_pairs=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && \$1 == "${1}" ) {print \$7, \$10 }}" | /usr/bin/sort -bu))


      dynrules=($(/usr/bin/sudo /sbin/ipfw -d -e -t list | /usr/bin/egrep "${argsregex}" | \
         /usr/bin/awk "{ if ( \$0 ~ /<->/ && \$1 == "${1}" ) {print \$7, \$8, \$10, \$11, \$6, \$2, \$3, \$1}}" | \
         /usr/bin/sort -bu))

   fi


for ((i=0; i < "${#ipaddr_pairs[@]}"; i++)); do 

   # byte
   #bytesum=$(printf "%s\n" "${dynrules[@]}" | \
        #/usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$7 }" | \
        #/usr/bin/awk '{ total = total + $1 } END { print total }')

   # mega byte
   bytesum=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$7 }" | \
        /usr/bin/awk '{ total = (total + $1) / (1024*1024.0) } END { print total }')

   proto=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$5 }" | \
        /usr/bin/sort -bu)

   rule=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$NF }" | \
        /usr/bin/sort -bu)

   ports=$(printf "%s\n" "${dynrules[@]}" | \
        /usr/bin/awk "{ if ( \$1 == \"${ipaddr_pairs[${i}]% *}\" && \$3 == \"${ipaddr_pairs[${i}]#* }\" ) print \$2, \$4 }" | \
        /usr/bin/sort -bu)

   # byte
   #printf "%-15s %-10s %-40s %-30s \e[1m%-30s\e[m\n" \
        #"bytes: ${bytesum}" "${proto//[[:cntrl:]]/, }" "${ipaddr_pairs[${i}]% *}  ::  ${ipaddr_pairs[${i}]#* }" \
        #"rules: ${rule//[[:cntrl:]]/, }" "ports: ${ports//[[:cntrl:]]/, }"

   # mega byte
   printf "\e[1mmbytes\e[m: %-15s %-10s %-40s \e[1mrules\e[m: %-25s \e[1mports\e[m: %-30s\n" \
        "${bytesum}" "${proto//[[:cntrl:]]/, }" "${ipaddr_pairs[${i}]% *}  ::  ${ipaddr_pairs[${i}]#* }" \
        "${rule//[[:cntrl:]]/, }" "${ports//[[:cntrl:]]/, }"

#done | /usr/bin/sort -rn -k 2,2
done | /usr/bin/sort -rn -k 2,2 | /usr/bin/egrep -v '^[^ ]+ +[^ ]+e[^ ]+'

   export IFS=${OIFS}
   return 0
}


# usage:
# ruletraffic [rulenum]
# ruletraffic [rulenum1] [rulenum2] [rulenum3] ...

ruletraffic 5200
ruletraffic 5200 12700 7100

Block internet traffic to specified web sites on the fly

to shell osx mac bash ip unix web internet access route traffic website localhost ipaddress block blackhole by jvs on Oct 09, 2008

man 8 route
/sbin/route -n get default
/sbin/route -n get default | grep -w gateway
/sbin/route -n get default | grep interface | awk '{print $NF}'

/usr/bin/dig +short www.web_site.com                                 # get IPNUM
/usr/bin/sudo /sbin/route -n add -host IPNUM 127.0.0.1 -blackhole    # block IPNUM
/usr/sbin/netstat -rn | grep IPNUM                                   # show routing table
/usr/bin/sudo /sbin/route delete IPNUM 127.0.0.1                     # undo blocking


function blocksite() {
   declare ipaddr ipnum
   if [[ "${1//localhost/}" == '' ]] || [[ "${1//127.0.0.1/}" == '' ]]; then 
      printf "%s\n" 'Argument "localhost" is not permitted!'
      return 1
   fi
   ipnum=$(/usr/bin/dig +short "${1}" | /usr/bin/sed -E -n -e 's/^(([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3})$/\1/p'; exit ${PIPESTATUS[0]})
   if [[ $? -ne 0 ]] || [[ -z "${ipnum}" ]]; then 
      printf "%s\n%s\n" "Are you connected to the internet?" "man dig could not find the IP address of: ${1}"
      return 1
   fi
   OIFS=${IFS}
   IFS=$' \t\n'
   for ipaddr in ${ipnum//[[:cntrl:]]/ }; do
      /usr/bin/sudo /sbin/route -n add -host ${ipaddr} 127.0.0.1 -blackhole >/dev/null 2>&1
   done
   export IFS=${OIFS}
   printf "%s\n" "... blocking internet access to site: ${1} with IP address: ${ipnum//[[:cntrl:]]/, }"
   return 0
}


function unblocksite() {
   declare ipaddr ipnum
   if [[ "${1//localhost/}" == '' ]] || [[ "${1//127.0.0.1/}" == '' ]]; then 
      printf "%s\n" 'Argument "localhost" is not permitted!'
      return 1
   fi
   ipnum=$(/usr/bin/dig +short "${1}" | /usr/bin/sed -E -n -e 's/^(([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3})$/\1/p'; exit ${PIPESTATUS[0]})
   if [[ $? -ne 0 ]] || [[ -z "${ipnum}" ]]; then 
      printf "%s\n%s\n" "Are you connected to the internet?" "man dig could not find the IP address of: ${1}"
      return 1
   fi
   OIFS=${IFS}
   IFS=$' \t\n'
   for ipaddr in ${ipnum//[[:cntrl:]]/ }; do
      /usr/bin/sudo /sbin/route delete ${ipaddr} 127.0.0.1 >/dev/null 2>&1
   done
   export IFS=${OIFS}
   printf "%s\n" "... unblocking internet access to site: ${1} with IP address: ${ipnum//[[:cntrl:]]/ }"
   return 0
}


function unblockall() {
   declare ipaddr ipnums
   ipnums=$(/usr/sbin/netstat -rnf inet | /usr/bin/awk '{ if ( $2 == "127.0.0.1" && $3 == "UGHSB" ) print $1 }'; exit ${PIPESTATUS[0]})
   if [[ $? -ne 0 ]] || [[ -z "${ipnums}" ]]; then 
      printf "%s\x21\n" "No IP addresses to unblock"
      return 1
   fi
   OIFS=${IFS}
   IFS=$' \t\n'
   for ipaddr in ${ipnums//[[:cntrl:]]/ }; do
      /usr/bin/sudo /sbin/route delete ${ipaddr} 127.0.0.1 >/dev/null 2>&1
   done
   export IFS=${OIFS}
   printf "%s\n" "... unblocking internet access to IP addresses: ${ipnums//[[:cntrl:]]/ }"
   return 0
}


function showblocked() {
   ipnums=$(/usr/sbin/netstat -rnf inet | /usr/bin/awk '{ if ( $2 == "127.0.0.1" && $3 == "UGHSB" ) print $1 }'; exit ${PIPESTATUS[0]})
   printf "%s\n" "Blocked IP addresses: ${ipnums//[[:cntrl:]]/, }"
   return 0
}



blocksite codesnippets.joyent.com
netstat -rnf inet | grep UGHSB
showblocked
open http://codesnippets.joyent.com
unblocksite codesnippets.joyent.com

blocksite codesnippets.joyent.com
blocksite www.google.com
netstat -rnf inet | grep UGHSB
showblocked
open http://www.google.com
unblockall

Enable internet traffic via specified ports through ipfw

to shell osx mac bash unix web port ipfw firewall internet access traffic by jvs on Oct 08, 2008

# cf. Example ipfw ruleset, http://codesnippets.joyent.com/posts/show/1267

# choose appropriate numbers for num1 & num2 according to your ipfw ruleset

/usr/bin/sudo /sbin/ipfw list
/usr/sbin/sysctl -n net.inet.ip.fw.autoinc_step

function free_ipfw_rule_num() {
   declare -i num1=6701 num2=6799 lastipfwnum
   if [[ $(/usr/sbin/sysctl -n net.inet.ip.fw.autoinc_step) -ne 100 ]]; then 
      printf "%s\x21\n" "sysctl -n net.inet.ip.fw.autoinc_step is not set to 100"
      return 1
   fi
   lastipfwnum=$(/usr/bin/sudo /sbin/ipfw list | /usr/bin/tail -n 2 | /usr/bin/head -n 1 | /usr/bin/awk '{print $1}')
   if [[ $num2 -ge $lastipfwnum ]]; then 
      printf "%s\x21\n" "${num2} is greater than or equal to ${lastipfwnum}"
      return 1
   fi
   while $(/usr/bin/sudo /sbin/ipfw show ${num1} &>/dev/null) ; do
      let "num1 += 1"
      if [[ $num1 -gt $num2 ]]; then num1=; break; return 1; fi
   done
   printf "%s\n" "${num1}"
   return 0
}


function openport() {
   declare portnum rulenum
   if [[ $# -ne 1 ]]; then printf "%s\n" "Wrong number of arguments: $#"; return 1; fi
   portnum="${1//[^[:digit:]]/}"
   if [[ -z $portnum ]]; then printf "%s\n" "No valid port number given: ${1}"; return 1; fi
   if [[ $portnum -gt 65535 ]]; then printf "%s\n" "Given port number is greater than 65535: ${portnum}"; return 1; fi
   rulenum=$(free_ipfw_rule_num)
   /usr/bin/sudo /sbin/ipfw -q add ${rulenum} allow all from any to any dst-port ${portnum} keep-state
   printf "%s\n" "... opening ipfw rule no. ${rulenum} for internet access via port ${portnum}"
   return 0
}


function closeport() {
   declare portnum rulenum
   if [[ $# -ne 1 ]]; then printf "%s\n" "Wrong number of arguments: $#"; return 1; fi
   portnum="${1//[^[:digit:]]/}"
   if [[ -z $portnum ]]; then printf "%s\n" "No valid port number given: ${1}"; return 1; fi
   if [[ $portnum -gt 65535 ]]; then printf "%s\n" "Given port number is greater than 65535: ${portnum}"; return 1; fi
   rulenum=$(/usr/bin/sudo /sbin/ipfw list | /usr/bin/awk "/from +any +to +any +dst-port +${portnum} +keep-state[[:space:]]*$/ {print \$1

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Record your dynamic WAN IP addresses

File upload with curl & AppleScript

Ping a port with hping3

Analyze internet traffic volume with dynamic ipfw rules

Block internet traffic to specified web sites on the fly

Enable internet traffic via specified ports through ipfw

Joyent

CodeSnippets

Related Tags

Never been to CodeSnippets before?

On This Page:

Record your dynamic WAN IP addresses

File upload with curl & AppleScript

Ping a port with hping3

Analyze internet traffic volume with dynamic ipfw rules

Block internet traffic to specified web sites on the fly

Enable internet traffic via specified ports through ipfw