This may not belong in "stable", but since Postfix is one of the high-performance alternatives to sendmail.... Question is this -- I have sshguard protecting connections inbound, but Postfix appears to be ignoring it, which implies that it is not paying attention to the hosts.allow file (and the wrapper that enables it.) Recently a large body of clowncars have been targeting my sasl-enabled https gateway (which I use for client machines and thus do in fact need) and while sshguard picks up the attacks and tries to ban them, postfix is ignoring the entries it makes which implies it is not linked with the tcp wrappers. A quick look at the config for postfix doesn't disclose an obvious configuration solution....did I miss it? -- Karl Denninger karl at denninger.net <mailto:karl at denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2996 bytes Desc: S/MIME Cryptographic Signature URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20160725/faabccba/attachment.bin>
On Mon, 25 Jul 2016 18:48:25 +0200, Karl Denninger <karl at denninger.net> wrote:> This may not belong in "stable", but since Postfix is one of the > high-performance alternatives to sendmail.... > > Question is this -- I have sshguard protecting connections inbound, but > Postfix appears to be ignoring it, which implies that it is not paying > attention to the hosts.allow file (and the wrapper that enables it.) > > Recently a large body of clowncars have been targeting my sasl-enabled > https gateway (which I use for client machines and thus do in fact need) > and while sshguard picks up the attacks and tries to ban them, postfix > is ignoring the entries it makes which implies it is not linked with the > tcp wrappers. > > A quick look at the config for postfix doesn't disclose an obvious > configuration solution....did I miss it? >Don't know if postfix can handle tcp wrappers, but I use bruteblock [1] for protecting connections via the ipfw firewall. I use this for ssh and postfix. Regards, Ronald. [1] http://www.freshports.org/security/bruteblock/