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Old 9th November 2010, 02:25
linus3x linus3x is offline
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Quick followup: I installed ISPConfig 3 on the production server. It's been up for about a week and I haven't seen the "dns: sendto() failed" error on that box at all so I suspect this was a development box/name server issue - just like till said.

BTW - the errors I saw when ISPConfig's firewall and fail2ban were both writing to iptables looked like this:

Code:
2010-11-02 22:24:33,124 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-ssh returned 100
2010-11-02 22:24:33,124 fail2ban.actions.action: ERROR Invariant check failed. Trying to restore a sane environment
Configuring fail2ban to use ip route instead of iptables fixed those errors right up.
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