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I'm setting up an LVS using tunnelling, and I'm having trouble
seeing/getting the responses from the real-server(s).
For the time being, I'm using one director and just one real-server.
These are leased servers in a remote datacenter.
The setup is as follows:
director RIP = 88.198.41.117 (plus subnet 88.198.198.120/29)
LVS VIP = 88.198.198.122
real server RIP = 88.198.7.133
My test-client is at 217.8.220.94
On the client, I'm using telnet <VIP> 25 and I've got postfix running on
the real server listening on the VIP.
Using tcpdump:
1. I see the request arriving on the real server over the tunnel link.
2. On the real server I see the response being sent.
3. I see no responses back on my client.
The connection between the real server and the client is fine.
What am I missing here? Are the responses from my real server somehow
being blocked because they have a source address of <VIP>? Or is this
a plain routing problem?
/Per Jessen, Zürich
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