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

4
By: din7
2009-08-03 20:18:41

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//' | ...
linuxrawkstar · 613 weeks and 4 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.
linuxrawkstar · 613 weeks and 4 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'
linuxrawkstar · 613 weeks and 4 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,})|(?:(?
jaguasch · 613 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\.'
jaguasch · 613 weeks and 3 days ago
Great catch, jaguasch
linuxrawkstar · 613 weeks and 3 days ago
Excellent work guys.
din7 · 613 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\.'
carmp3fan · 613 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\.'
carmp3fan · 613 weeks and 3 days ago

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