Date: Mon, 13 Jul 2015 12:11:43 +0300 From: Alexey Pereklad <technical@at-hacker.in> To: Kristof Provost <kp@FreeBSD.org> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD 9.3: Looks like a bug in pf NAT while translating ICMP packets of type 3 Message-ID: <55A380CF.2030503@at-hacker.in> In-Reply-To: <20150707123320.GF3135@vega.codepro.be> References: <559BC04F.70107@at-hacker.in> <20150707123320.GF3135@vega.codepro.be>
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Hi. I checked if I can reproduce this issue with -CURRENT. Well, -CURRENT has the same problem. Here is my test lab: # uname -a FreeBSD test-BSD-01.hyperv.local 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r285351: Fri Jul 10 14:49:08 MSK 2015 root@test-BSD-01.hyperv.local:/usr/obj/usr/src/sys/GENERIC amd64 Here is dump on LAN interface: # tcpdump -npi hn1 host 172.16.129.18 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on hn1, link-type EN10MB (Ethernet), capture size 262144 bytes 11:43:25.506775 IP 172.16.129.18.29490 > 208.67.220.220.53: 9125+ A? freebsd.org. (29) 11:43:25.570851 IP 208.67.220.220.53 > 172.16.129.18.29490: 9125 1/0/0 A 8.8.178.110 (45) 11:43:25.571635 IP 172.16.129.18 > 208.67.220.220: ICMP 172.16.129.18 udp port 29490 unreachable, length 36 Dump on external WAN interface at the same moment: # tcpdump -npi hn0 \(udp and port 53\) or icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on hn0, link-type EN10MB (Ethernet), capture size 262144 bytes 11:43:25.741672 IP 213.208.xx.yy.55677 > 208.67.220.220.53: 1319+ A? ya.ru. (23) 11:43:25.795961 IP 208.67.220.220.53 > 213.208.xx.yy.55677: 1319 3/0/0 A 93.158.134.3, A 213.180.193.3, A 213.180.204.3 (71) 11:43:25.796700 IP 172.16.129.18 > 208.67.220.220: ICMP 213.208.xx.yy udp port 55677 unreachable, length 36 So I've created bugreport: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201519 07.07.2015 15:33, Kristof Provost пишет: > On 2015-07-07 15:04:31 (+0300), technical account <technical@at-hacker.in> wrote: >> I have an issue with pf in FreeBSD 9.3. Looks there is something wrong >> with pf's NAT while processing ICMP packets of type 3 (destination >> unreachable). >> > Can you check if this also happens on CURRENT? > > If so, please create a bug on bugs.freebsd.org/bugzilla and cc me > (kp@FreeBSD.org). > You've already gathered the information required for a good bug report. > > I'll try to take a look at it when I find some time. >
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