Date: Mon, 20 Jan 2014 17:17:30 -0500 From: Jason Hellenthal <jhellenthal@dataix.net> To: "William A. Fink" <bill@billfink.com> Cc: "<freebsd-hackers@freebsd.org>" <freebsd-hackers@freebsd.org> Subject: Re: Looking For Beginner/Mediocre Help Message-ID: <45D07BAC-D99A-4F54-AB3A-48AB611E4185@dataix.net> In-Reply-To: <06be01cf162a$dd337bd0$979a7370$@billfink.com> References: <06be01cf162a$dd337bd0$979a7370$@billfink.com>
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--Apple-Mail-BD7F3473-28F8-499F-8288-E34684D16357 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Since this is SMTP and not a service like http you might be able to benefit f= rom throttling and then shoving into a blacklist that expires the entries af= ter a certain period of time after they run a threshold. This is a pf exampl= e rule that would do that but still requires a table and the pf expiration p= rogram expiretable. I use this method for ssh connections but should work fine for 25, 587 or ot= herwise. pass in quick inet proto tcp from any port >1023 to any port =3D 22 keep sta= te \ (max-src-conn 5, max-src-states 10, max-src-nodes 5, max-src-conn-rate 5/300= overload <blacklist> flush global) --=20 Jason Hellenthal Voice: 95.30.17.6/616 JJH48-ARIN > On Jan 20, 2014, at 16:59, "William A. Fink" <bill@billfink.com> wrote: >=20 > I hope I'm not double-posting, posting in a list I'm not supposed to, but i= t > seems (to me, anyway) a great place to start. Seems it never fails, someon= e > comes back and complains, this is the wrong list. (No matter which list I'= ve > posted to in the past.) >=20 > I've these log entries each and every single day in my security logs: > (needless to say, there are quite a few variations they attempt to use for= > username, seems it's getting worse every day.) I've ALL of China/Korea > blocked, might I add. There's a guy who posts the CIDR addresses for/from > China that's ALL in my black-hole routing table. I recognize that can only= > go so far, but it did indeed help for a good while. >=20 > Any other solution(?) that anyone could help me with here? I'm simply > looking for a simple way to stop these and/or determine where they're comi= ng > from. (No other log shows where they originate from.) >=20 > I'm not even certain if I'm USING SASLAUTHD, so is there a way I can > determine where these scripts are coming from so I can easily add their IP= > to the black-hole route? >=20 > Thanks SO much in advance, and if I posted in the wrong place, please acce= pt > my sincerest apologies - even a one liner where to start to figure out whe= re > these are originating from would be a great help! >=20 > Jan 12 00:02:27 rmx saslauthd[978]: do_auth : auth failure: > [user=3Dups] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth e= rror] > Jan 12 00:16:00 rmx saslauthd[980]: do_auth : auth failure: > [user=3Dups] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth e= rror] > Jan 12 00:29:36 rmx saslauthd[981]: do_auth : auth failure: > [user=3Dfedex] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth= error] > Jan 12 00:35:03 rmx saslauthd[966]: do_auth : auth failure: > [user=3Dstudent] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM au= th error] > Jan 12 00:43:07 rmx saslauthd[979]: do_auth : auth failure: > [user=3Dfedex] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth= error] > Jan 12 00:56:47 rmx saslauthd[978]: do_auth : auth failure: > [user=3Dphone] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth= error] > Jan 12 01:10:23 rmx saslauthd[980]: do_auth : auth failure: > [user=3Dphone] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth= error] > Jan 12 01:24:04 rmx saslauthd[981]: do_auth : auth failure: > [user=3Dnoreply] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM au= th error] > Jan 12 01:24:56 rmx saslauthd[966]: do_auth : auth failure: > [user=3Dsupport] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM au= th error] > Jan 12 01:37:48 rmx saslauthd[979]: do_auth : auth failure: > [user=3Dnoreply] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM au= th error] > Jan 12 01:51:20 rmx saslauthd[978]: do_auth : auth failure: > [user=3Dttest] [service=3Dsmtp] [realm=3D] [mech=3Dpam] [reason=3DPAM auth= error] >=20 > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"= --Apple-Mail-BD7F3473-28F8-499F-8288-E34684D16357 Content-Type: application/pkcs7-signature; name=smime.p7s Content-Disposition: attachment; filename=smime.p7s Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIUOTCCBjAw ggUYoAMCAQICAwaijjANBgkqhkiG9w0BAQsFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx ODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50IENB MB4XDTEzMDUxODA4NTA0OFoXDTE0MDUxOTIyMDk0N1owSDEfMB0GA1UEAwwWamhlbGxlbnRoYWxA ZGF0YWl4Lm5ldDElMCMGCSqGSIb3DQEJARYWamhlbGxlbnRoYWxAZGF0YWl4Lm5ldDCCASIwDQYJ 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