2 May
2012
2 May
'12
11:33 a.m.
On May 2, 2012, at 11:05 AM, Andreas Schulze wrote: > Am 02.05.2012 10:47 schrieb Lu Heng: >> Anybody know a way to check a block of IP like /19 or something. > - You may mirror the rbl of interest. lookup in to your local copy should be fine. > - Or you ask the rbl provider for a notification. That may also cost money. > - capture all packets, identify SMTP-Responses and check the result strings. - signup for feedback loops with major email providers (http://blog.wordtothewise.com/isp-information/) - use grepcidr for lookups in local dbs (http://www.pc-tools.net/unix/grepcidr/) - read and act upon abuse@ emails ;) - check with major RBLs for your outgoing SMTP servers being listed (nagios check_rbl plugin) cheers, Jernej