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Retrieve top ip threats from http://isc.sans.org/sources.html and add them into iptables output chain.

Terminal - Retrieve top ip threats from http://isc.sans.org/sources.html and add them into iptables output chain.
curl -s http://isc.sans.org/sources.html|grep "ipinfo.html"|awk -F"ip=" {'print $2'}|awk -F"\"" {'print $1'}|xargs -n1 sudo iptables -A OUTPUT -j DROP -d > 2&>1
2009-08-03 20:18:41
User: din7
Functions: awk grep iptables sudo xargs
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Retrieve top ip threats from http://isc.sans.org/sources.html and add them into iptables output chain.

Retrieve top ip threats from http://isc.sans.org/sources.html and add them into iptables output chain.

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What others think

upvoted++

good job. But may I humbly submit that you drop the awk in favor of:

...| perl -pi -e 's/^.*ip=(.*?)".*/\1/;s/^0//' | ...
Comment by linuxrawkstar 146 weeks and 3 days ago

by the way, the perl version I just provided takes care of whacking off the leading zeros that they use to "pad" the IP addresses for easier sorting (quoting the web page). This isn't taken into account in the awk code.

Comment by linuxrawkstar 146 weeks and 3 days ago

turns out there's a much more easily scraped version provided here: http://isc.sans.org/ipsascii.html

It would also seem that they are padding each octet with leading zeros. In this case ...

curl -s http://isc.sans.org/ipsascii.html|grep -v '#'|awk '{print $1}'|perl -pi -e 's/(?:^0{1,})|(?:(?<=\.)0{1,}(?!\.))//g'
Comment by linuxrawkstar 146 weeks and 3 days ago

Maybe is a good idea to filter the ip addresses which could match with internal ones (today in that list, 10.50.50.50 appeared!)

curl -s http://isc.sans.org/ipsascii.html|grep -v '#'|awk '{print $1}'|perl -pi -e 's/(?:^0{1,})|(?:(?

Comment by jaguasch 146 weeks and 3 days ago

Sorry:

curl -s http://isc.sans.org/ipsascii.html|grep -v '#'|awk '{print $1}'|perl -pi -e 's/(?:^0{1,})|(?:(?<=\.)0{1,}(?!\.))//g'|egrep -v '^192\.|^10\.|^172\.|^224\.'
Comment by jaguasch 146 weeks and 3 days ago

Great catch, jaguasch

Comment by linuxrawkstar 146 weeks and 3 days ago

Excellent work guys.

Comment by din7 146 weeks and 3 days ago

Jaguash, I love your addition, but it will remove non-private IPs. How about this?

curl -s http://isc.sans.org/ipsascii.html | grep -v '#' | awk '{print $1}' | perl -pi -e 's/(?:^0{1,})|(?:(?<=\.)0{1,}(?!\.))//g' | grep -v - P '^10\.|^172\.(16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31)\.|^192\.168\.'
Comment by carmp3fan 146 weeks and 3 days ago

You could also cut the regex down a bit more.

curl -s http://isc.sans.org/ipsascii.html | grep -v '#' | awk '{print $1}' | perl -pi -e 's/(?:^0{1,})|(?:(?<=\.)0{1,}(?!\.))//g' | grep -v -P '^10\.|^172\.((1[6-9])|(2[0-9])|(3[0|1]))\.|^192\.168\.'
Comment by carmp3fan 146 weeks and 2 days ago

Your point of view

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