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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: disabling SMTP
[3/28/2004 7:29 PM] Rob Nelson : Could you elaborate on this? I use PIX firewalls all over the place and don't seem to have a problem with SMTP or ESMTP.Check whether "smtp fixup" is enabled - and if it is, disable it using # no fixup protocol smtp 25 Test the results (from an outside host, using netcat / telnet to port 25) to see for yourself. Briefly, a pix doing "smtp fixup" - * Munges the smtp banner entirely with ***** (that breaks an rfc or two) * Disables ESMTP (so EHLO will not be accepted) * Munges several replies returned by the mailserver, turning them to XXX srs -- srs (postmaster|suresh)@outblaze.com // gpg : EDEDEFB9 manager, outblaze.com security and antispam operations
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