[lvs-users] Real server refuses packets originated from itself and redirected by LVS

[Siim Põder]

Hi

Ondrej.Rajmon at cuzk.cz wrote:
> When RS1 connects to itself thru VIP, TCP connection is not
> established. Using tcpdump I can see that the SYN packet leaves an
> RS1's interface and immediately arrives back as it's redirected by
> LB. So it looks well and correctly. But when watching
> NAT-prerouting table, the packet doesn't appear there. It seems as
> the packet get lost somewhere between an input interface and the
> prerouting hook. I don't understand ... Can anybody explain that
> behaviour?

Is the rp_filter sysctl on by any chance?

Siim