Cannot connect to *some* sites ... but my windoze box can see 'em all

[spock]

Just upgraded from FC2 to FC3. I now am able to connect to some sites correctly - e.g. fedoraforum.org is fine (I am entering this on the FC3 box).

BUT ... I cannot connect to others - e.g. www.redhat.com, www.atrpms.net ... my windoze boxes can see all the sites. (I have a 100bt LAN connected to a draytek rtr to a dsl line)

I have googled until my fingers bleed, but cannot see why this does not work.

I have looked at ethereal traces and the TCP SYN packet is the same for both connects - except the winoze box sets a bigger rx window.

I'm stumped - please help!

[ilja]

turn off ipv6
see : http://www.mozilla.org/releases/mozilla1.7/README.html

Users of Fedora Core 2 may experience unusually long delays in resolving hostnames. This results from the fact that IPv6 is enabled by default in Fedora Core 2. If you do not need IPv6 support (which is most likely the case), then it is advised that you disable it in the kernel. To do this run the following command as root: echo "alias net-pf-10 off" >> /etc/modprobe.conf You will need to reboot to have this take effect (or simply unload the ipv6 kernel module).


and http://www.redhat.com/archives/fedora-devel-list/2004-November/msg00758.html

[spock]

Thanks for reply - but ipv6 is already turned off - and has been for months!
From an ethereal trace, I can see the ipv4 connection being attempted (the SYN referred to in my post).
The question is why does redhat (for instance) reply to my windoze box, but not my FC3 box?

[Brian1]

Sounds odd but items to check or try.
Compare the DNS numbers between the two and see if they differ?
If using dhcp then I would enter DNS provided from dsl provider.
Turn off firewall and see if that has any effect.
Whats in /etc/resolv.conf file?

Brian1

[spock]

Sounds odd but items to check or try.
Compare the DNS numbers between the two and see if they differ?
If using dhcp then I would enter DNS provided from dsl provider.
Turn off firewall and see if that has any effect.
Whats in /etc/resolv.conf file?

Brian1
Hi Brian1 - thanks for taking the time to reply.

Indeed it sounds odd - both the windoze and the linux boxes resolve to the same IP numbers. I can see this from the ethereal traces - both boxes attempt to connect to the same IP number - the only difference is the window size set by the linux box is a lot smaller than the windoze one.

BTW, I am using the same DNS settings on windows and linux.

spock

[spock]

Looks like this problem was caused by my router ...

For some reason, it wassd filtering the linux packets out and not the windoze ones.

Thanks for the suggestions.