[lvs-users] IPVS stops tunneling with ipip on SSL traffic causing session failures

[Phillip Moore]

Thank you for the suggestion.

We didn't have the netfilter module loaded at all so I don't think it
would have having any impact. However I loaded it and set this setting
and it didn't change the behavior.
The ip_conntrack_tcp_be_liberal setting wasn't available on our kernel
version looks like I can't find a module to load to enable that.

We did find something interesting. If we add additional headers to the
working http request we can make it fail.

WORKS: curl -H "X:1" http://10.64.96.10/healthcheck
FAILS:  curl -H "X:12" http://10.64.96.10/healthcheck

190 bytes works, 191 bytes fails with the failure to tunnel problem.


Phillip Moore


On Fri, Aug 28, 2015 at 2:42 PM, Julian Anastasov <ja at ssi.bg> wrote:

>
>         Can you test with enabled nf_conntrack_tcp_be_liberal
> or ip_conntrack_tcp_be_liberal sysctl value in director?
> May be packets are dropped by conntrack because packets
> from reply direction are not seen.