dns.he.net BASH update script

ddns_update.sh

#!/bin/sh

# Hurricane Electric dynamic dns update script by Paul Fertser

# When in doubt, install Live HTTP Headers extension for Firefox and
# compare the POST requests

# specify your external interface
wan_iface=eth1
# set your HE login credentials
login=myhelogin
password=myhepassword
domain=mydomain.info
# zoneid and recordid can be easily obtained by looking at the
# html source of the page with the list of records on the web-interface
zoneid=846761
recordid=88994497

current_ip=`ip a s dev $wan_iface | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' | head -n 1`
cookies=/tmp/he-cookies.txt

curl -k --cookie-jar $cookies https://dns.he.net/ -o /dev/null
curl -k --cookie $cookies --cookie-jar $cookies --data "email=$login&pass=$password&submit=Login%21" https://dns.he.net/ -o /dev/null
curl -k --cookie /tmp/he-cookies.txt --data "account=&menu=edit_zone&Type=A&hosted_dns_zoneid=$zoneid&hosted_dns_recordid=$recordid&hosted_dns_editzone=1&Priority=-&Name=$domain&Content=$current_ip&TTL=60&hosted_dns_editrecord=Update" "https://dns.he.net/?hosted_dns_zoneid=$zoneid&menu=edit_zone&hosted_dns_editzone" -o /dev/null