Re: TCP failed connection attempts

[Dan Van Der Ster <daniel.vanderster@xxxxxxx>]

On 27 Mar 2014 at 10:44:35, Sergey Malinin (hell@xxxxxxxxxxx) wrote:

sysctl has nothing to do with that since those are just counters. You can debug failed connections by logging connection resets:
iptables -I INPUT -p tcp -m tcp --tcp-flags RST RST -j LOG

Thanks for that… you helped me identify a host that was looping through many failed connections to our OSD servers. (It was a half-disabled ceph dashboard tool… my fault, probably).

But even after removing that host, I still see the failed connections counter increasing while there are no packets logged from above. 

So I’m still looking …

Cheers, Dan

-- Dan van der Ster || Data & Storage Services || CERN IT Department --

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