On 31.10.2017 02:57, Viktor Dukhovni wrote: > I am using FreeBSD 11.1 as the O/S for my DANE/SMTP adoption scanner. > The system has an IPv4 static IPv4 and also a corresponding 6to4 > address on stf0. > > The system is stable when I run IPv4-only scans, but crashes quickly > as soon as I start a bulk scan that also connects to the IPv6 addresses > of remote SMTP servers. Indeed after getting the destination address > of the connection that caused the panic (see below) I can now reproduce > the problem at will with just: > > $ nc 2a01:5b40:0:2201::1 25 > > since hardware checksums don't seem to play along with ipfw and NAT. > The scans run on the machine itself, not an internal node. > > #9 0xffffffff80c82b84 in ip6_output (m0=0xfffff80049f8e000, opt=<value > optimized out>, ro=0xfffff80329e90530, flags=<value optimized out>, > im6o=<value optimized out>, ifpp=0x0, inp=<value optimized out>) at > /usr/src/sys/netinet6 Hi,
can you show your nat rules? Also what will show following commands in kgdb: f 9 i lo p *ifp p *ro p *m -- WBR, Andrey V. Elsukov
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