Re: IPSec tcp session stalling ( me too ) ...

2005-10-24 Thread Volker
Yvan, >>2) a gif tunnel > > No, and that's the main difference for now: I *never* used Gif > interfaces. And that's the point. When not using a gif interface to pass traffic through the IPSec tunnel, I don't see any trouble at all and everything works fine. As soon as a gif interface is invo

Re: IPSec tcp session stalling ( me too ) ...

2005-10-23 Thread Volker
Yvan, as far as I'm not totally wrong on the MTU issue, I've already checked that. On the other side, if it's an MTU issue, wouldn't the stream break at the first oversized packet? I mean the scp session is sending around 56k of data through the stream and then the session stalls. My gnetcat test

Re: IPSec tcp session stalling ( me too ) ...

2005-10-23 Thread VANHULLEBUS Yvan
On Sat, Oct 22, 2005 at 10:01:46PM +0100, Volker wrote: [] > Is anybody else here with deep TCP + IPSec knowledge able to get a look > into this? Any known issues? Is there anything I might also check out? > Is there a 64k limit with IPSec? :( IPSec works, even for huge datas sessions: I'm usi

Re: IPSec tcp session stalling ( me too ) ...

2005-10-22 Thread Matthew Grooms
Matthew Grooms wrote: Volker, ipfw is enabled. I use purely IPSEC so I would agree that GRE isn't the > problem. This behavior is 100% reproducible for me. If traffic is > forwarded from the host providing the ESP protection or if the Sorry, this should have read ... > problem. This behavior

IPSec tcp session stalling ( me too ) ...

2005-10-22 Thread Matthew Grooms
Volker, I have noticed the same problem. In my case, it only seems to happen when the traffic is being forwarded across interfaces and pf or ipfw is enabled. I use purely IPSEC so I would agree that GRE isn't the problem. This behavior is 100% reproducible for me. If traffic is forwarded

Re: IPSec tcp session stalling ( me too ) ...

2005-10-22 Thread Volker
Matthew, thanks for your reply. Glad to hear that I'm not the only one experiencing this problem. So the problem is IPSec + firewall but not related to pf or ipfw. Is it IPSec + bandwidth management?? I've tried a different test setup and just pushed a bunch of (/dev/random) data over a tcp conne