A traceroute to shows the following: listsrv:~ # traceroute www.nwmissouri.edu traceroute to info1.nwmissouri.edu (198.209.246.4), 30 hops max, 40 byte packets 1 core4-mfr.cmsu.edu (153.91.24.157) 51 ms 2 ms 1 ms 2 cmsufire-b.cmsu.edu (153.91.210.251) 1 ms 1 ms 1 ms 3 morenet-gw.cmsu.edu (153.91.251.254) 2 ms 2 ms 2 ms 4 kc-r10-01-atm3-0-3-102-aal5.mo.more.net (150.199.51.49) 33 ms 36 ms 37 ms 5 nwmsu-atm2-0-101-aal5.gw.more.net (150.199.50.174) 99 ms 42 ms 59 ms 6 info1.nwmissouri.edu (198.209.246.4) 482 ms !H 157 ms !H 71 ms !H
The ouput from tcpdump has the following: listsrv.cmsu.edu.1926 > info1.nwmissouri.edu.http: S [ECN-Echo,CWR] What does " S [ECN-Echo,CWR]" mean? James Johnson Email: [EMAIL PROTECTED] Systems Programmer Voice: 660-543-8065 Central Missouri State University Fax: 660-543-8123 ----- Original Message ----- From: "Eddie Chen" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, February 21, 2003 1:20 PM Subject: Re: Routing question > You can do a traceroute on that IP address or tcpdump. Most likely > a filter is set on the router or firewall. > > "tcpdump -i ctc0 -w /home/echen/tcpdump.trace" & --- run in > background > > start you ftp /telnet > > do "ps" and kill the process(tcpdump) > > tcpdump -vvv -r /home/echen/tcpdump.trace > > /home/echen/trace.listing > > You should found ICMP type 03 in the trace and from there it will > tell you which router > > > > James Johnson > <[EMAIL PROTECTED] To: [EMAIL PROTECTED] > msu.edu> cc: > Sent by: Linux Subject: Routing question > on 390 Port > <[EMAIL PROTECTED] > arist.edu> > > > 02/21/2003 > 06:18 PM > Please respond > to Linux on 390 > Port > > > > > > > We have Linux machine running a listserv that is unable to reach > a specific ip address. I can not ftp telnet or e-mail to this address > from Linux. This address is external to our network. I can reach other > addresses that are external to our network from Linux. > > I can, however, reach this address from VM. > > Any thoughts as to why this is happening? > > We are running z/VM 4.2, SUSE 7.0 and using an OSA Express > Gigabit card. > > James Johnson Email: [EMAIL PROTECTED] > Systems Programmer Voice: 660-543-8065 > Central Missouri State University Fax: 660-543-8123 > > > > > > ----------------------------------------- > This message and its attachments may contain privileged and confidential information. If you are not the intended recipient(s), you are prohibited from printing, forwarding, saving or copying this email. If you have received this e-mail in error, please immediately notify the sender and delete this e-mail and its attachments from your computer. >
