On 07/14/15 09:15, Mark Felder wrote:
> On Tue, Jul 14, 2015, at 07:36, Sydney Meyer wrote:
>> - Dropped/Stalled Connections with TCP Segmentation Offload and pf
>> enabled.
> TSO is a known issue. I've been turning it off for years to get FreeBSD
> to play nice on Xen.

More precisely *pf* is a known issue.  It's inserting TCP checksums
into TSO packets.  I reported this a long time ago and I don't know
why pf still hasn't been fixed.

Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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