On Wed, May 21, 2008 at 1:27 AM, Vlad GALU <[EMAIL PROTECTED]> wrote: > On 5/20/08, Cristian Bradiceanu <[EMAIL PROTECTED]> wrote: >> On Tue, May 20, 2008 at 7:20 PM, Jeremy Chadwick <[EMAIL PROTECTED]> wrote: >> > On Tue, May 20, 2008 at 06:30:58PM +0300, Cristian Bradiceanu wrote: >> >> I am trying to set up split routing on two Internet links, each with >> >> one IP address: >> >> >> >> em0 = wan1, $em0_gw gateway >> >> em1 = lan, NATed on em0 and em2 >> >> em2 = wan2, default gateway >> >> >> >> pass in on em0 reply-to (em0 $em0_gw) inet proto tcp from any to em0 >> flags S/SA keep state >> >> pass in on em0 reply-to (em0 $em0_gw) inet proto udp from any to em0 >> keep state >> >> pass in on em0 reply-to (em0 $em0_gw) inet proto icmp from any to em0 >> keep state >> >> >> >> wan2 connections are working correct, no pf rules for policy routing >> >> >> >> wan1 tcp connections to IP of em0 (e.g. ssh) stall when a large amount >> >> of data is sent (e.g. running dmesg or cat file). States are created >> >> correctly. When ssh stalls there are some icmp packets out on lo0 with >> >> source and destination ip address of em0, which I believe is not >> >> correct (set skip on lo0 does not help). Also tried with tcp ... >> >> modulate state but same result. >> > >> > modulate state is known to be broken: >> > >> > http://wiki.freebsd.org/JeremyChadwick/Commonly_reported_issues >> > >> > Regarding the "when large amounts of data is sent, the connection >> > breaks" issue: >> > >> > I've reproduced this a few times on our systems (using the exact same >> > method you do: dmesg, cat'ing large files, or scp'ing -- anything using >> > large TCP packets), and it's always been caused by improper pf(4) rules >> > where state was broken. In every case, the "state mismatch" counter >> > shown in pfctl -s info would increase. >> >> >> state-mismatch counter does not increase, all "Counters" are 0 except >> match (pfctl -si). When large amounts of data is sent the connection >> stalls and continues from time to time very slow; when it continues >> there are logged icmp packets out on lo0 from (em0) to (em0) which >> looks pretty weird to me. >> >> >> Cristian > > This may be a PMTUD issue. Make sure your ICMP packets can travel > back and forth unhindered and that there are no scrub rules that may > clear out the DF flag on them.
There's no no-df scrub flag, also no icmp filters. Cristian _______________________________________________ freebsd-pf@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-pf To unsubscribe, send any mail to "[EMAIL PROTECTED]"
