[Haifux] State-dependent firewall and Gmail spam filtering
eli at billauer.co.il
Tue Jan 15 10:20:10 MSK 2013
I asked these two questions in a previous mail which you all ignored.
Which was probably because I mixed it with announcing that our server
has moved. So here we go again:
(1) For some reason, the server's firewall doesn't handle --state
RELATED, ESTABLISHED properly. In fact, this rule doesn't catch any
input packets at all, even when the server initiates a connection! In
particular, it doesn't let through answers to its own DNS queries (port
53) on UDP, which is elementary. The server is an openVZ VPS running
CentOS 5.6. Ideas?
(2) I've noted that administrative messages from mailman (the mailing
list manager), e.g. subscription confirmation messages, go to Gmail's
spam folder. The rDNS for haifux.org is set up properly, and still. From
what I understand, the mailing list messages themselves go by fine. Any
comments? Insights? I have reasons to believe this is a widespread
issue, but how is it solved?
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