Date: Fri, 3 Mar 2017 18:21:34 +0100 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: Nagy =?UTF-8?B?TMOhc3psw7M=?= Zsolt <gandalf@shopzeus.com> Cc: freebsd-questions@freebsd.org Subject: Re: TCP connection stalled Message-ID: <20170303182134.106d613d@fabiankeil.de> In-Reply-To: <485311bf-1e19-b439-c569-b6230d264e16@shopzeus.com> References: <485311bf-1e19-b439-c569-b6230d264e16@shopzeus.com>
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--Sig_/rqgGIeJ=4oQfJwHrhNwpc6m Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Nagy L=C3=A1szl=C3=B3 Zsolt <gandalf@shopzeus.com> wrote: > Hello, I have this setup: >=20 > Remote computer <---> Internet <-----> Gateway <----> NAT-ed local > network <---> Internal computer >=20 > The gateway is a 11.0-RELEASE-p8 running natd + ipfw. [...]=20 > If I try to copy something to a remote server with this command: >=20 > scp local_file user@remote_computer:~ >=20 > Then the following happens: the first few 100K data goes through > quickly, then the connection becomes stalled. I have tried different > remote computers on different ports, but the result is always the same. > I have also tried passive mode FTP instead of SCP with the same result: > stalled. >=20 > If I do the same from the internal computer behind NAT, then all uploads > and downloads are fast and responsive. The connection is stalled only > when I connect from the gateway (or to the gateway). (E.g. copy from > internal computer -> remote computer is fast and reliable.) [...] > But there was no effect at all. SCP and FTP connections are both > stalled. (I can send an example tcpdump if required, but I could find > nothing special in that.) >=20 > What else can cause this? What should I look for? You may be affected by this regression: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209680 You could check the "vmstat -z" output and try the patches. Fabian --Sig_/rqgGIeJ=4oQfJwHrhNwpc6m Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQTKUNd6H/m3+ByGULIFiohV/3dUnQUCWLmmHwAKCRAFiohV/3dU nTgWAJ9jPvJvLzZVHhzq+kQToCl37p3r7wCfcMGkegwpmJ5J0AvzFTXXqUXVf0Y= =InJl -----END PGP SIGNATURE----- --Sig_/rqgGIeJ=4oQfJwHrhNwpc6m--
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