Re: SNMP Informs sent from snmpd do not work if firewall is enabled on the machine

Dave Shield <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <[email protected]>
On 6 June 2011 11:48, Dattaram Porob <[email protected]> wrote:
> "iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT" is
> already present in the firewall configuration but still it does not
> work :(

Sorry - I'm not thinking straight.
SNMP traffic is typically UDP-based, rather than TCP,
so no, that wouldn't help.


> Any other suggestions?

Try adding an entry to accept traffic from port 162 on the trap
receiver.   Something like

    -A INPUT -p udp --sport 162   -s {IP}   -j ACCEPT

where {IP} is the IP address of the receiving host.

Dave

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