At 09:23 PM 4/30/2002 +0100, you wrote: >On Tuesday 30 April 2002 9:14 pm, Andrew Greenburg wrote: > > > At 04:07 PM 4/30/2002 -0400, you wrote: > > >On Tue, Apr 30, 2002 at 02:58:23PM -0500, Andrew Greenburg wrote: > > > > Hi, > > > > > > > > I've been using an iptables-based firewall at the office for several > > > > months, and all of a sudden today I started having problems with > > > > opening network connections to UNIX hosts. The port opens, and then it > > > > sits there for about 60 seconds before it actually responds. After > > > > that, the connection works normally. My tcp/ip connections to NT-based > > > > servers work fine. There have been absolutely no changes to the > > > > configuration of the netfilter box. > > > > > > > > Any ideas? > > > > > >DNS?? > > > > Well, I've been trying to connect by IP address. > >No, I think what Ramin meant was "reverse DNS". > >Maybe the server is trying to do a reverse lookup on your IP address to see >if it can put a hostname into its logfiles ?
Could be, but I administer one of the boxes, and I haven't changed anything to that effect on it. I did see the identd requests come across when initiating an FTP connection, but I'm getting these connection lapses when connecting to services that don't trigger an identd request (including http). -- Andrew M. Greenburg | agreenbu @ in-span . net Systems Engineer | (317)234-1001 (317)234-1328 Indiana Web Academy | Phone Fax
