Confirm response not using requested address

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Hi,

I have a server running gnugk with a network configuration a little tricky.
I'll explain the parts of the config that are rellevant.
I have eth1 using vlan (I think it would not change the problem if it were not using vlan...)
eth1.10 (vlan 10) has an IP Address 172.31.10.254/24
the lo has its usual address 127.0.0.1 but I added some aliases:
lo:0 address is 193.252.20.34
lo:5 address is 193.253.73.89

here is part ot the routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
172.26.0.0      172.31.10.1     255.255.0.0     UG    0      0        0 eth1.10

An endpoint (IP address 172.26.35.2) is requesting gatekeeper at 193.253.73.89
but the gnugk is responding with the confirm using 172.31.10.254 as the source IP address!

I can't use the option "Home=193.253.73.89" because I have other endpoints requesting at 193.252.20.34

Here is a capture showing the issue.
 

The answer should always use the IP address originaly used in the request.
This also should be the case on any future connexion (not only on request/confirm)

Thanks

--
Pascal Greliche


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Attachment: capture request_confirm.pcap
Description: Binary data

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