Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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I recently bought a new machine and put FC3 on it (old machine has RH9). I get my internet from DSL modem by ethernet (not PPPoE). It works fine on RH9. On FC3 I do get connected. All pings work fine, with proper DNS translation. But when I use a browser (browser independant) I can not get to some wesites (yahoo, google) and can get to others (slashdot, memepool) but very slowely. When I use an IP of a site I can't reach (obtained from a ping), I get the site fast, but of course with no images.
I've already done some troubleshooting and here is what I know.
Both machines set to DHCP with no retrievel of DNS from ISP. The DNS listings are the same. Yes I did check resolv.conf.
I have turned off the firewall and SELinux for troubleshooting purposes.
netstat -rn (old)
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
netstat -rn (new)
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
127.0.0.1 0.0.0.0 255.255.255.255 UH 0 0 0 lo
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
For some odd reason the new system doesn't add a loopback device to the netstat listing eventhough there is one in ifconfig. The one you see here was added manually by myself, but again this has no effect. The genmask is wrong/odd but I can't seem to control that.
Thinking it might be the MAC address, I installed a Windows (blech) HD next to my FC3 HD and loaded the ISP configuration software from it. Windows http works fine, no change in FC3. So it isn't hardware or MAC. It has to be a setting inside.
I'm using my rh9 box to send this. What am I missing?
I have a similar problem, i installed Fedora Core3 and i cannot get internet, i can ping all machines on my LAN, but i cant ping or visit ANY external pages. i have the DNS entries in ( not that this affects ping)
If u come up with a solution be sure and let me know, and i do the same likewise
I've tried some more troubleshooting with the same results.
I've tried changing OS'es - Gnoppix gets same results.
I tried Mandrake but it couldn't install (peice of $*@^). It couldn't find my onboard video or internet connection or circa early 90's Epson printer. Waste of $8 for the mail order disk IMHO.
I tried a different/new NIC (ethernet) card. Same results, MS Windows works fine, Linux gets bogged down. I made sure to reset the DSL modem to rule out MAC issues.
I'm starting to run out of ideas.
I tried a traceroute to yahoo on port 80 and it worked as would be expected (i.e. it konks out at the end).
FYI my dsl uses RFC 1483 if that makes any difference. Goggle just told me that RFC 1483 is just a ATM protocol. All the same, if rh9 can support it I have to imagine that fc3 can too.
Can anyone help me please? I got this nice pretty and new machine which is fairly useless to me now.
More strange toubleshooting findings. During a recent rash of needing to reset my DSL modem (dern DSL provider - always konking out) I tried my FC3 right after a successfull reset (which was done in Windows of course - 'I can't get myself clean'). So right away in FC3 I tried to go to yahoo (a page I couldn't get to), and it went there faster than lightning. Slashdot was still slow. I tried other websites that hadn't worked before and they didn't work. A reload of yahoo.com did work, but any other yahoo page wouldn't. I restarted my computer and found that it had returned to its usual behaviour - I couldn't even load yahoo. Argh.
So the problem remains unfixed. Anyone out there have any ideas of tools I could use to actually probe the data streams to see what is specifically being sent and specifically being not received? (Also any one know of a machine that I could get that would download the inteligence into my brain to help me understand these data streams - just kidding)
Okay - more troubleshooting. I installed rh9 on the new machine and it worked great !!! I getting closser. Then I used the same Gnoppix disk that I had used before and that worked!! Feeling lucky I installed fc3 - and - Nope.
I'm thinking there is something unique to fc3 that doesn't like my system. I'll have to shop around for something else. I'm collecting a rather large collection of useless distros. Anyone have any thoughts?
Add another wasted distro. Fedora Core 2 doesn't work either. I'm persuing a lead. It might be a 1.0.0.0 problem where it can't handle the www's. More research is needed.
I just had done a search based on my DSL modem (Actiontec) and found it. I had the worng DNS's in there. All I had to do was put the right ones in there and make sure that it didn't try to get them from the ISP again. Now it works perfect.
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