[CentOS] pop3 attack

Scott Silva ssilva at sgvwater.com
Wed Dec 10 19:50:50 UTC 2008


on 12-10-2008 8:02 AM James Pifer spake the following:
> On Tue, 2008-12-09 at 16:26 -0500, James Pifer wrote:
>> Thanks to all. For now I've stopped it using iptables. I tried stopping
>> it at my router without success, yet another reason to replace it! I
>> will also report it to abuse at covad.net. 
>>
> 
> My issues have gotten worse. Apparently over the last few days my ip
> address has gotten blacklisted. No idea why. Even though I have a
> commercial class cable modem service, my ip is residential because it
> comes to my house. But I've been running my mail server for several
> years and never had an issue. 
> 
> I've tried adding these lines to my sendmailmc and rebuilding it, but
> then nothing routes, not even local. 
> 
> define(`SMART_HOST',`smtp-server.carolina.rr.com')dnl
> MASQUERADE_AS(carolina.rr.com)dnl
> FEATURE(`allmasquerade')dnl
> FEATURE(`masquerade_envelope')dnl
> 
> Now I'm using mailertable and that appears to be working. 
> 
> I'm not even sure this message with get to this list. Seems like I
> haven't received any centos list mail in a while. I have on my other
> lists though.
> 
> Any help is appreciated. 
> 
> Thanks,
> James
I think all the masquerade options are causing your problems. Just set the
proper smarthost and restore the other options to what they were and then test.



-- 
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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