From owner-freebsd-net@FreeBSD.ORG Fri Dec 14 10:58:48 2007 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CEDA616A418 for ; Fri, 14 Dec 2007 10:58:48 +0000 (UTC) (envelope-from vermaden@interia.pl) Received: from smtp4.poczta.interia.pl (smtp35.poczta.interia.pl [80.48.65.35]) by mx1.freebsd.org (Postfix) with ESMTP id CFB2E13C46A for ; Fri, 14 Dec 2007 10:58:47 +0000 (UTC) (envelope-from vermaden@interia.pl) Received: by smtp4.poczta.interia.pl (INTERIA.PL, from userid 502) id AB5913C51DE; Fri, 14 Dec 2007 11:58:46 +0100 (CET) Received: from f49.poczta.interia.pl (f49.poczta.interia.pl [10.217.2.49]) by smtp4.poczta.interia.pl (INTERIA.PL) with ESMTP id 377C93C51BA; Fri, 14 Dec 2007 11:58:46 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by f49.poczta.interia.pl (Postfix) with ESMTP id E873D45B819; Fri, 14 Dec 2007 11:58:45 +0100 (CET) Date: 14 Dec 2007 11:58:45 +0100 From: vermaden To: Eygene Ryabinkin MIME-Version: 1.0 Content-Type: TEXT/plain; CHARSET=ISO-8859-2 Content-Transfer-Encoding: QUOTED-PRINTABLE X-ORIGINATE-IP: 217.76.112.72 X-Mailer: PSE Message-Id: <20071214105845.E873D45B819@f49.poczta.interia.pl> X-EMID: f3a40acc Cc: freebsd-net@freebsd.org Subject: Re: default route X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Dec 2007 10:58:49 -0000 > Fri, Dec 14, 2007 at 11:20:32AM +0100, vermaden wrote: > > I already used tcpdump, if ICMP packet goes in thru 192.168/16 on rl1 > the > > response goes out on 10/24 on rl0. >=20 > And the destination MAC address of the ICMP reply that is going > through rl0 is? >=20 > What if you'll do two experiments: drop the default route and change > it to something in the 192.168/16? Will ping results be the same > or packets will be thrown out through another interfaces? >=20 > What FreeBSD version you're using? > --=20 > Eygene FreeBSD 6.3-PRERELEASE built from sources from a week ago, but after RC1 fo= r sure. zenek# uname -a FreeBSD zenek 6.3-PRERELEASE FreeBSD 6.3-PRERELEASE #0: Mon Nov 26 13:20:01= CET 2007 vermaden@siewa:/usr/obj/usr/src/sys/CUSTOM i386 CUSTOM is GENERIC with removed makeoptions DEBUG=3D-g and removed cpu I486_= CPU and cpu I586_CPU. BTW: I changed 192.168.0.0/16 to 169.254.169/24 which most hosts use in my = network. zenek# netstat -rfinet Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 10.0.0.1 UGS 0 716450 rl0 10/24 link#1 UC 0 0 rl0 10.0.0.1 00:90:27:5d:f7:3b UHLW 2 18729 rl0 963 10.0.0.2 00:15:17:23:c0:8a UHLW 1 353 rl0 999 10.0.0.7 00:e0:18:0d:d3:3d UHLW 1 3479223 rl0 1195 10.0.0.107 00:90:27:77:fd:98 UHLW 1 39945 rl0 715 10.0.0.119 00:02:b3:d0:bc:6a UHLW 1 96 rl0 821 localhost localhost UH 0 14 lo0 169.254.169/24 link#2 UC 0 0 rl1 169.254.169.24 00:06:29:99:02:9d UHLW 1 845 rl1 1099 169.254.169.44 00:90:cc:b6:18:1f UHLW 1 4 rl1 775 169.254.169.45 00:90:cc:c4:21:25 UHLW 1 6 rl1 584 zenek# ifconfig rl0: flags=3D8943 mtu 1500 options=3D8 inet 10.0.0.71 netmask 0xffffff00 broadcast 10.0.0.255 ether 00:90:cc:de:5e:0c media: Ethernet autoselect (100baseTX ) status: active rl1: flags=3D8843 mtu 1500 options=3D8 inet 169.254.169.171 netmask 0xffffff00 broadcast 169.254.169.255 ether 00:02:44:51:ae:80 media: Ethernet autoselect (100baseTX ) status: active zenek# route add default 169.254.169 route: writing to routing socket: File exists add net default: gateway 169.254.169: route already in table zenek# route add default 169.254.169.1 route: writing to routing socket: File exists add net default: gateway 169.254.169.1: route already in table When I ping 169.254.169.24 (Linux) from 169.254.169.171 (my FreeBSD box) I = get that on rl1: zenek# tcpdump -lvvni rl1 icmp tcpdump: listening on rl1, link-type EN10MB (Ethernet), capture size 96 byt= es 11:38:44.269250 IP (tos 0x0, ttl 64, id 6670, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.171 > 169.254.169.24: ICMP echo reques= t, id 64923, seq 96, length 64 11:38:44.270445 IP (tos 0x0, ttl 64, id 9072, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo reply,= id 64923, seq 96, length 64 11:38:45.283470 IP (tos 0x0, ttl 64, id 7317, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.171 > 169.254.169.24: ICMP echo reques= t, id 64923, seq 97, length 64 11:38:45.284662 IP (tos 0x0, ttl 64, id 9073, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo reply,= id 64923, seq 97, length 64 11:38:46.299274 IP (tos 0x0, ttl 64, id 8097, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.171 > 169.254.169.24: ICMP echo reques= t, id 64923, seq 98, length 64 11:38:46.299398 IP (tos 0x0, ttl 64, id 9074, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo reply,= id 64923, seq 98, length 64 11:38:47.312169 IP (tos 0x0, ttl 64, id 9030, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.171 > 169.254.169.24: ICMP echo reques= t, id 64923, seq 99, length 64 11:38:47.313374 IP (tos 0x0, ttl 64, id 9075, offset 0, flags [none], prot= o: ICMP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo reply,= id 64923, seq 99, length 64 ^C 8 packets captured 12 packets received by filter 0 packets dropped by kernel zenek# tcpdump -lvvni rl1 arp tcpdump: listening on rl1, link-type EN10MB (Ethernet), capture size 96 byt= es 11:38:53.320435 arp who-has 169.254.169.171 tell 169.254.169.24 11:38:53.320454 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:38:55.004282 arp who-has 169.254.169.1 tell 169.254.169.251 11:38:58.009399 arp who-has 169.254.169.1 tell 169.254.169.251 11:38:58.335180 arp who-has 169.254.169.171 tell 169.254.169.24 11:38:58.335194 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:39:01.015256 arp who-has 169.254.169.1 tell 169.254.169.251 11:39:03.354950 arp who-has 169.254.169.171 tell 169.254.169.24 11:39:03.354975 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 When I ping 169.254.169.171 (my FreeBSD box) from 169.254.169.24 (Linux) I = get this: zenek# tcpdump -lvvni rl1 icmp tcpdump: listening on rl1, link-type EN10MB (Ethernet), capture size 96 byt= es 11:43:41.451446 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 58691, seq 14, length 64 11:43:42.451201 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 58691, seq 15, length 64 11:43:43.450948 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 58691, seq 16, length 64 11:43:44.450697 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 58691, seq 17, length 64 11:43:45.450456 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 58691, seq 18, length 64 11:43:46.450199 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 58691, seq 19, length 64 ^C 7 packets captured 11 packets received by filter 0 packets dropped by kernel zenek# tcpdump -lvvni rl1 arp tcpdump: listening on rl1, link-type EN10MB (Ethernet), capture size 96 byt= es 11:43:59.836991 arp who-has 169.254.169.1 tell 169.254.169.251 11:44:00.447690 arp who-has 169.254.169.171 tell 169.254.169.24 11:44:00.447752 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:44:02.843485 arp who-has 169.254.169.1 tell 169.254.169.251 11:44:05.848340 arp who-has 169.254.169.1 tell 169.254.169.251 11:44:06.446182 arp who-has 169.254.169.171 tell 169.254.169.24 11:44:06.446215 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:44:08.853626 arp who-has 169.254.169.1 tell 169.254.169.251 11:44:11.861778 arp who-has 169.254.169.1 tell 169.254.169.251 11:44:12.445681 arp who-has 169.254.169.171 tell 169.254.169.24 11:44:12.445697 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:44:13.022591 arp who-has 169.254.169.111 tell 169.254.169.25 For Both FreBSD --> Linux ping and Linux --> FreeBSD ping the tcpdump -lvvn= i rl1 arp and tcpdump -lvvni rl1 icmp commands does not show any packets. zenek# route delete default delete net default zenek# route add default 169.254.169.1 add net default: gateway 169.254.169.1 zenek# netstat -rfinet Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 169.254.169.1 UGS 0 0 rl1 10/24 link#1 UC 0 0 rl0 10.0.0.1 00:90:27:5d:f7:3b UHLW 1 18729 rl0 1032 10.0.0.2 00:15:17:23:c0:8a UHLW 1 353 rl0 744 10.0.0.7 00:e0:18:0d:d3:3d UHLW 1 3614982 rl0 1180 10.0.0.107 00:90:27:77:fd:98 UHLW 1 47136 rl0 460 10.0.0.119 00:02:b3:d0:bc:6a UHLW 1 96 rl0 567 localhost localhost UH 0 14 lo0 169.254.169/24 link#2 UC 0 0 rl1 169.254.169.1 link#2 UHLW 2 0 rl1 169.254.169.24 00:06:29:99:02:9d UHLW 1 863 rl1 1197 169.254.169.44 00:90:cc:b6:18:1f UHLW 1 4 rl1 1123 169.254.169.45 00:90:cc:c4:21:25 UHLW 1 6 rl1 330 169.254.169.171 00:02:44:51:ae:80 UHLW 1 0 lo0 zenek# tcpdump -lvvni rl1 icmp tcpdump: listening on rl1, link-type EN10MB (Ethernet), capture size 96 byt= es 11:55:26.992028 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 17, length 64 11:55:27.991774 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 18, length 64 11:55:28.755811 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.25 > 169.254.169.102: ICMP echo request, id= 49508, seq 0, length 64 11:55:28.991538 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 19, length 64 11:55:29.991277 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 20, length 64 11:55:30.991025 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 21, length 64 11:55:31.990778 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 22, length 64 11:55:32.990530 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 23, length 64 11:55:33.990275 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 24, length 64 11:55:34.990028 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 25, length 64 11:55:35.111973 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.25 > 169.254.169.108: ICMP echo request, id= 52580, seq 1024, length 64 11:55:35.531991 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.25 > 169.254.169.106: ICMP echo request, id= 52580, seq 7680, length 64 11:55:35.932022 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.25 > 169.254.169.104: ICMP echo request, id= 52580, seq 14336, length 64 11:55:35.934160 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.25 > 169.254.169.104: ICMP echo request, id= 52580, seq 14336, length 64 11:55:35.989777 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 26, length 64 11:55:36.592069 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.25 > 169.254.169.114: ICMP echo request, id= 52580, seq 25088, length 64 11:55:36.989532 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 27, length 64 11:55:37.990277 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 28, length 64 11:55:38.990028 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 29, length 64 11:55:39.989777 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 30, length 64 11:55:40.989529 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 31, length 64 11:55:41.989280 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 59972, seq 32, length 64 11:55:43.858700 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 1, length 64 11:55:44.858565 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 2, length 64 11:55:45.858313 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 3, length 64 11:55:46.858063 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 4, length 64 11:55:47.857815 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 5, length 64 11:55:48.857560 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 6, length 64 11:55:49.857312 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 7, length 64 11:55:50.857061 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 8, length 64 11:55:51.856811 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: IC= MP (1), length: 84) 169.254.169.24 > 169.254.169.171: ICMP echo request, id= 6725, seq 9, length 64 ^C 31 packets captured 71 packets received by filter 0 packets dropped by kernel zenek# tcpdump -lvvni rl1 arp tcpdump: listening on rl1, link-type EN10MB (Ethernet), capture size 96 byt= es 11:55:55.856789 arp who-has 169.254.169.171 tell 169.254.169.24 11:55:55.856835 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:55:57.693579 arp who-has 169.254.169.110 tell 169.254.169.25 11:55:58.429370 arp who-has 169.254.169.1 tell 169.254.169.251 11:55:58.693651 arp who-has 169.254.169.110 tell 169.254.169.25 11:55:59.693722 arp who-has 169.254.169.110 tell 169.254.169.25 11:56:01.437132 arp who-has 169.254.169.1 tell 169.254.169.251 11:56:01.745871 arp who-has 169.254.169.110 tell 169.254.169.25 11:56:01.855291 arp who-has 169.254.169.171 tell 169.254.169.24 11:56:01.855334 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 11:56:02.745943 arp who-has 169.254.169.110 tell 169.254.169.25 11:56:03.746020 arp who-has 169.254.169.110 tell 169.254.169.25 11:56:04.443491 arp who-has 169.254.169.1 tell 169.254.169.251 11:56:05.922217 arp who-has 169.254.169.110 tell 169.254.169.25 11:56:06.922271 arp who-has 169.254.169.110 tell 169.254.169.25 11:56:07.450864 arp who-has 169.254.169.1 tell 169.254.169.251 11:56:07.854791 arp who-has 169.254.169.171 tell 169.254.169.24 11:56:07.854810 arp reply 169.254.169.171 is-at 00:02:44:51:ae:80 tcpdump on rl0 still nothing. My question here, maybe I do something wrong here, maybe tell me what way i= t should be done to achieve the proper behaviour, thanks in advance for any suggesti= ons. Regards veramden ---------------------------------------------------------------------- Nie masz pomyslu na smaczne danie? Mnostwo smacznych przepisow na http://link.interia.pl/f1cac