iptables prints "Warning: wierd character in interface `ethX:Y' (No aliases, :, ! or *)." when using IP aliasing

Solution Verified - Updated 2010-01-06T15:08:49+00:00 -

Issue

Running "iptables -o ethX:Y" prints an error like this:

Warning: wierd character in interface `ethX:Y' (No aliases, :, ! or *).

However, "iptables -L" shows the rule is loaded correctly.

RHEL 5

At least one IP alias has been set on at least one interface.

iptables is used to force outgoing packet to go through an aliased interface.

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