On Thursday 18 December 2003 14:09, Fraser Campbell wrote:

On Thursday 18 December 2003 13:39, Henry Spencer wrote:

...

that's aware of Internet addresses and can manipulate them as such. I'm sure somebody's got a library for that in Perl...

Net::IPv4Addr ...

use Net::IPv4Addr qw( :all ); $logline = 'asdf 43tr gerag fdgdgf 34.23.45.222'; if ($ip = ipv4_checkip($logline) ) { print "$ip\n"; } OK, fine...I'll try to teach myself some perl over the winter. Is the above going to give me what I want; a subnet match?

I know how to tell iptables to drop all packets from a single IPv4Addr or it's assigned subnet. iptables -I OUTPUT -p udp -d 209.239.224.0/19 -j drop-and-log-it iptables -I OUTPUT -p tcp -d 209.239.0.7 -j drop-and-log-it Now I may have 100k IPv4Addr addresses in a single log file or multiple preprocessed files and I want only the lines in which the IPv4Addr belongs to 209.239.224.0/19, then either print to stdout or a file. This entire excersise I am doing betwix two machines using only ssh and sftp. I aim to preprocess some of the data on the server before transferring over for more detailed analysis. Can anyone recommend a good book for learning perl from scrath? -- Eating Crow is better with MyCrowSauce -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml