Date: Mon, 6 Feb 1995 18:21:14 -0800 From: Stephen Melvin <melvin@zytek.com> To: freebsd-questions@FreeBSD.org Subject: Source IP address trashed on some packets Message-ID: <199502070221.SAA04911@syzygy.zytek.com>
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Hello, I posted this question about a month ago and I'm still at a loss to determine the problem. I'd be grateful if anyone could at least point me in the right direction. How should I go about tracking it down? Thanks. Since I upgraded from 1.1 to 1.1.5.1, I'm having trouble with certain outgoing packets, specifically those from ping and traceroute. Other services seem to work fine. I ran tcpdump and determined that the problem is that the outgoing IP address is garbage. This may have something to do with the fact with an ioctl error message I get. Also note that in this particular setup I periodically invoke and then kill pppd (this since there is no demand dial and I'm anxious to try out iij-ppp by the way). Here is a sample log when I invoke pppd: ------- Feb 7 02:45:02 seine pppd[4348]: pppd 2.1.2 started by root, uid 0 Feb 7 02:45:25 seine pppd[4350]: Connect: ppp0 <--> /dev/tty02 Feb 7 02:45:28 seine pppd[4350]: local IP address 193.104.118.2 Feb 7 02:45:28 seine pppd[4350]: remote IP address 193.107.193.22 Feb 7 02:45:28 seine pppd[4350]: ioctl(PPPIOCSFLAGS): Inappropriate ioctl for device ------- Here are sample tcpdumps from a ping and a traceroute command showing the nonsensical source IP address. "ping 193.107.193.17" ------- 09:26:38.520605 86.0.26.0 > 193.107.193.17: icmp: echo request 09:26:39.533073 86.0.26.0 > 193.107.193.17: icmp: echo request 09:26:40.543428 86.0.26.0 > 193.107.193.17: icmp: echo request ------- "traceroute 193.107.193.17" ------- 09:21:50.003290 65.0.128.0.33881 > 193.107.193.17.33435: udp 12 [ttl 1] 09:21:55.013135 149.0.21.0.33881 > 193.107.193.17.33436: udp 12 [ttl 1] 09:22:00.022998 44.0.173.1.33881 > 193.107.193.17.33437: udp 12 [ttl 1] 09:22:05.033429 0.0.0.0.33881 > 193.107.193.17.33438: udp 12 09:22:10.043181 76.0.128.0.33881 > 193.107.193.17.33439: udp 12 09:22:15.052946 67.0.7.0.33881 > 193.107.193.17.33440: udp 12 ------- Thanks in advance for any suggestions. ------------ Steve Melvin melvin@zytek.com melvin@zytek.fr ---------------
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