Date: Wed, 18 Mar 1998 15:46:11 -0500 (EST) From: Becca Anderson <becca@worldint.com> To: freebsd-questions@FreeBSD.ORG Subject: TCP/IP Problems Message-ID: <Pine.BSF.3.91.980318151944.2892A-100000@win3.worldint.com>
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I'm have a machine that is setting on my isp's backbone (PP200/128MB/FreeBSD2.2.5/Intel EtherExpress Pro/100B) running apache. Connections from users with a fast connection (128K or better) seem fine, however, slower users have difficulty getting files > 16k via ftp or http. I have tcp_extensions turned off. It looks like the machine sends around 10k of data then the connection hangs until the other side times out. DNS is working correctly. I'm lost. If anyone needs any more info than this, let me know. Thanks in advance for any help you can give. Below is some tcpdump output of trying to retrieve a file at http://209.69.145.130/afr_sch1.bmp The same file is also available at: ftp://209.69.145.130/afr_sch1.bmp This is from the machine at the isp: deepthroat.mintsol.com (named after a character from the X-Files) tcpdump -ifxp0 |grep wiretap tcpdump: listening on fxp0 10:20:44.279891 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: S 368704001:368704001(0) win 16384 <mss 1460> (DF) 10:20:44.280003 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: S 721590408:721590408(0) ack 368704002 win 17520 <mss 1460> (DF) 10:20:45.139778 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 1 win 17520 (DF) 10:20:45.139972 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: P 1:29(28) ack 1 win 17520 (DF) 10:20:45.141206 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1:1461(1460) ack 29 win 17520 (DF) 10:20:45.141230 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: P 1461:2049(588) ack 29 win 17520 (DF) 10:20:47.669507 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: P 1:29(28) ack 1 win 17520 (DF) 10:20:47.669559 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 2049:2921(872) ack 29 win 17520 (DF) 10:20:49.553603 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1:1461(1460) ack 29 win 17520 (DF) 10:20:51.019236 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 1461 win 17084 (DF) 10:20:51.019291 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1461:2921(1460) ack 29 win 17520 (DF) 10:20:51.019339 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 2921:4381(1460) ack 29 win 17520 (DF) 10:20:59.553591 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1461:2921(1460) ack 29 win 17520 (DF) 10:21:00.081829 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 2921 win 17520 (DF) 10:21:00.081885 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 2921:4381(1460) ack 29 win 17520 (DF) 10:21:00.081932 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 4381:5841(1460) ack 29 win 17520 (DF) 10:21:00.624770 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 4381 win 17520 (DF) 10:21:00.624849 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 5841:7301(1460) ack 29 win 17520 (DF) 10:21:00.624905 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 7301:8761(1460) ack 29 win 17520 (DF) 10:21:00.822207 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 5841 win 17520 (DF) 10:21:00.822378 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 8761:10221(1460) ack 29 win 17520 (DF) 10:21:05.053606 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 5841:7301(1460) ack 29 win 17520 (DF) 10:21:05.631533 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 7301 win 17520 (DF) 10:21:05.631613 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 7301:8761(1460) ack 29 win 17520 (DF) 10:21:05.631662 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 8761:10221(1460) ack 29 win 17520 (DF) 10:21:14.558077 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 7301:8761(1460) ack 29 win 17520 (DF) 10:21:16.351869 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 8761 win 17520 (DF) 10:21:16.351951 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 8761:10221(1460) ack 29 win 17520 (DF) 10:21:16.352004 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 10221:11681(1460) ack 29 win 17520 (DF) 10:21:17.022951 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 10221 win 17520 (DF) 10:21:17.023009 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 11681:13141(1460) ack 29 win 17520 (DF) 10:21:17.023055 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 13141:14601(1460) ack 29 win 17520 (DF) 10:21:34.559156 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 10221:11681(1460) ack 29 win 17520 (DF) 10:22:10.559970 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 10221:11681(1460) ack 29 win 17520 (DF) 10:22:11.221008 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 11681 win 17520 (DF) 10:22:11.221075 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 11681:13141(1460) ack 29 win 17520 (DF) 10:22:11.221126 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 13141:14601(1460) ack 29 win 17520 (DF) 10:23:12.584927 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: F 29:29(0) ack 11681 win 17520 (DF) 10:23:12.584970 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . ack 30 win 17520 (DF) 10:23:15.053608 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 11681:13141(1460) ack 30 win 17520 (DF) 10:23:15.646061 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: R 368704031:368704031(0) win 0 Here's the output from a 33.6k dialup ppp account running FreeBSD with tcp_extensions also turned off. tcpdump -ippp0 |grep deepthroat tcpdump: listening on ppp0 10:20:43.690944 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: S 368704001:368704001(0) win 16384 <mss 1460> (DF) 10:20:44.455771 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: S 721590408:721590408(0) ack 368704002 win 17520 <mss 1460> (DF) 10:20:44.455884 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 1 win 17520 (DF) 10:20:44.456267 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: P 1:29(28) ack 1 win 17520 (DF) 10:20:47.070583 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: P 1:29(28) ack 1 win 17520 (DF) 10:20:50.054307 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1:1461(1460) ack 29 win 17520 (DF) 10:20:50.070556 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 1461 win 17084 (DF) 10:20:51.792558 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1461:2921(1460) ack 29 win 17520 (DF) 10:21:00.062948 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 1461:2921(1460) ack 29 win 17520 (DF) 10:21:00.070572 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 2921 win 17520 (DF) 10:21:00.599882 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 2921:4381(1460) ack 29 win 17520 (DF) 10:21:00.670653 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 4381 win 17520 (DF) 10:21:00.856653 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 4381:5841(1460) ack 29 win 17520 (DF) 10:21:00.870660 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 5841 win 17520 (DF) 10:21:05.563859 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 5841:7301(1460) ack 29 win 17520 (DF) 10:21:05.670756 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 7301 win 17520 (DF) 10:21:15.120427 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 7301:8761(1460) ack 29 win 17520 (DF) 10:21:15.270557 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 8761 win 17520 (DF) 10:21:16.875160 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 8761:10221(1460) ack 29 win 17520 (DF) 10:21:17.070668 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 10221 win 17520 (DF) 10:21:17.796115 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 10221:11681(1460) ack 29 win 17520 (DF) 10:22:11.087219 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 10221:11681(1460) ack 29 win 17520 (DF) 10:22:11.270544 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: . ack 11681 win 17520 (DF) 10:22:12.009016 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 11681:13141(1460) ack 29 win 17520 (DF) 10:23:11.097218 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: F 29:29(0) ack 11681 win 17520 (DF) 10:23:12.782529 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . ack 30 win 17520 (DF) 10:23:15.578996 deepthroat.mintsol.com.http > wiretap.worldint.com.1057: . 11681:13141(1460) ack 30 win 17520 (DF) 10:23:15.579168 wiretap.worldint.com.1057 > deepthroat.mintsol.com.http: R 368704031:368704031(0) win 0 ------------------------------------------------------------------------------ Becca Anderson (becca@worldint.com) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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