Hello All, I seem to be having an interesting problem with some web sites I try and visit, particularly http://www.pbs.org and http://www.half.com (ie, these are the ones I recall having problems with). Specifically, when I try and view these pages from my desktop machine, they refuse to load, and eventually give up. When I view them from my router/NAT machine, I see them fine.
Some details: I have a simple two-machine network. Machine A is connected via 1 NIC (an NE2000 if it matters) to a DSL modem, and thus to my ISP, and via another (D-Link with the Tulip driver) to a hub and thus to my desktop machine, B. A is running Linux kernel 2.4.13i, with netfilter and NAT compiled into the kernel, and is up-to-date with Debian's testing distribution. iptables is version 1.2.5 Machine A and B both have static IP addresses, machine A using the IP assigned by my ISP and 192.168.0.1 internally, and B using 192.168.0.10. I used tcpdump to try and capture details of an attempted connection with www.pbs.org from my desktop and from the router. While I do not know much about TCP, it seems that in both cases a connection is established (I do receive ACK packets from www.pbs.com in both cases), but machine A also receives several PUSH packets where machine B does not. Both connections are also cleanly killed with FIN packets and the requisite ACK. I can provide tcpdump data that I collected if anyone will find it useful, or I can get more if people want to suggest useful flag combinations to try. This problem does not affect every web server I try and visit. It seems only a small percentage do not wish to talk to me. However, I am finding this slightly irritating, and am hoping someone can clear up this problem for me. Also, I plan on extending my network by several machines soon, and would like to not have this problem with them as well. I hope I've given enough data for people to point me in the right direction (although I also hope this isn't too _much_ data). Thank you for all your help. John Cater [EMAIL PROTECTED]
