Re: protocol violation: synchronization error

From: John Madden (no email)
Date: Wed Dec 01 2004 - 00:26:06 EST


> The disconnect on your end looks like a readable socket on their end, while
> the software could attempt to distinguish between EOF and premature data,
> the distinction is hardly critical, the connection is gone either way...

Right, I'm just suggesting they show a less-scary message.

> Now this is where you make a fatal mistake. Search the archives, the
> same issue (connection latency to ident enabled sites) was discussed
> rather recently. Port 113 must NOT be silently blocked by firewalls
> (or host packet screens) for SMTP client sending email to the Internet.
> Sadly, some sites continue to use the long obsolete ident protocol.

...And quite sad that even the latest releases of Exim apparently are.

FWIW, changing the rule to a reject rather than drop doesn't seem to improve
the latency. Perhaps I'll have to dig deeper into my ruleset.

John

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