On Fri, 18 Jan 2002, Keith Morse wrote: > On Thu, 17 Jan 2002, Mike Burger wrote: > > On 17 Jan 2002, Bret Hughes wrote: > > > On Thu, 2002-01-17 at 16:05, Mike Burger wrote: > > > > On 17 Jan 2002, Bret Hughes wrote: > > > > > > > > > On Thu, 2002-01-17 at 14:21, Mike Burger wrote: > > > > > > I've got a weird problem. > > > > > > > > > > > > One of my systems can not connect to a remote host...while every other > > > > > > system on the network can. > > > > > > > > > > > > Now, I thought that maybe it was a matter of the IP being blocked/filtered > > > > > > at the remote end...but at the time, the system was acting as a mail > > > > > > server, and a masquerading firewall...so all connections to the remote end > > > > > > looked like they were coming from the same IP. Yet, connections directly > > > > > > from the system in question were failing (even when had run "service > > > > > > iptables stop"). > > > > > > Bummer. Just one last thought. Are you sure you are running iptables? > > > default is to build a firewall with ipchains. Had to ask. > > > > Yup...running IPtables. But the same machine, when connected directly to > > the net without the firewall running still had the same problem. > > When the word weird pops up, then it's time to get tcpdump running on the > affected interfaces and hopefully on a host between the two endpoints that > can see the traffic flowing between them. Also try other services such as > ssh, ftp, telnet, http and compare the tcpdump outputs you are monitoring.
nah, that's overkill :) he should try looking at the MTU on the host with problems, and seeing if it is set larger than the MTU's on the other hosts. If the other host's firewall blocks MTU path discovery (read: broken) then that host won't be able to connect. Is this a windows box having the problem? -- \ \/ / _ |~\ _ In God We Trust. All Others Pay Cash. > < / \|\ /|+-< | | "The world is a comedy to those that think, / /\ \\_/| \/ ||__)|_| a tragedy to those who feel." - Horace Walpole _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
