TCP Window Scaling issue
michael at supermathie.net
Thu Jul 24 16:35:02 UTC 2014
On 14-07-24 12:25 PM, Tony Finch wrote:
> Zach Hill <zach.reborn at gmail.com> wrote:
>> What's interesting is this is only affecting a single server and only
>> when traffic is going over the WAN circuit. Testing from Server A to any
>> server on it's network shows it is negotiating window scaling just fine.
> Check your firewall isn't buggering about with TCP options.
This, exactly. I diagnosed this issue a while back with our Checkpoint
firewall - it didn't understand TCP window scaling so it would blindly
zero out the field and cause nightmares.
Michael Brown | The true sysadmin does not adjust his behaviour
Systems Administrator | to fit the machine. He adjusts the machine
michael at supermathie.net | until it behaves properly. With a hammer,
| if necessary. - Brian
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