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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Please list your resolv.conf and network manager settings.
Remember that you can manually override dns settings. If you followed some tutorial, along the lines that may have happened, it was suggested to try a live distro and check results, that is normally a great way to rule out some possibilities.
This can also give some more info on network troubleshooting.
Part of this seems like caching on the parts of webservers, why some websites load, don't load, or load faster. And I believe the content is likely one point of difference between IE and Chrome and/or Firefox.
One other thing to try is to install nmap(1) and check a site for http port accessibility from a given computer.
Code:
~/testcode$ nmap -p 80 mit.edu
Starting Nmap 5.21 ( http://nmap.org ) at 2014-05-16 07:50 EDT
Nmap scan report for mit.edu (23.66.166.151)
Host is up (0.016s latency).
rDNS record for 23.66.166.151: a23-66-166-151.deploy.static.akamaitechnologies.com
PORT STATE SERVICE
80/tcp open http
Nmap done: 1 IP address (1 host up) scanned in 0.18 seconds
Thanks for your help.
It is Friday night, I have some beers to drink, but here is some info if you can make any sense of it. I started Windows when I came home tonight. I could load bbc.co.uk and lufthansa.com, so I am ruling out a hardware problem.
Could my isp sneakily put anything anywhere on Fed 20 which would interfere? I have deleted all cookies lots of times
This resolv.confof my laptop. Can't give you the one from my office comp, but I suppose it is the same. This is Fed 20 I'm using now.
# Generated by NetworkManager
domain Home
search Home
nameserver 192.168.1.1
I cant get the command line: ethtool -t ethX [offline|online] to give an answer. What's wrong??
[pedro@pedro-bedro ~]$ ethtool -t eth0 [offline|online]
ethtool: bad command line argument(s)
For more information run ethtool -h
bash: online]: command not found...
[pedro@pedro-bedro ~]$ ethtool -t em2 [offline|online]
ethtool: bad command line argument(s)
For more information run ethtool -h
bash: online]: command not found...
[pedro@pedro-bedro ~]$
Ok, so I think you followed some guides or something is going on.
Can you run ifconfig -a
Seems weird to have em2 on a laptop. You definitely don't have 3 ethernet cards on that unles some settings changed by you.
Anyway, you have the router as dns, check the dns on your router.
The ethtool
Run it like
ethtool -t em2 online
You don't use [ ] or both options. Use only 1 at a time.
But with those tx and rx bytes, the computer didn't run long, but look at tx in ifconfig. The tx shows carier 1.
Run the system longer and watch that carrier count. That means your device is flapping and you need to figure out what is causing the flapping.
Could be drivers, chipset, cable. It could also be your network, so you can use eth tool to turn off auto negotiation experiment with different types of duplex etc, those can also cause issues
I will exclude isp because you had same issues in your office.
But the c600d has atheros. I don't know much about them, but i think it is fair to put them with the broadcom and realtek stuff. They don't always work that great.
Last edited by ericson007; 05-16-2014 at 09:46 AM.
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
search Home
This is also Ubuntu: I don't know why Fedora uses em2, I just installed it from a dvd which I downloaded from linuxquestions. Does the name of the interface matter?? It is 7am, I just started the computer. You said let it run a while, so I can repost later.
pedro@pedro-bedro:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:26:6c:b1:ae:88
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::226:6cff:feb1:ae88/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24519 errors:0 dropped:0 overruns:0 frame:0
TX packets:15945 errors:0 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:1000
RX bytes:30378064 (30.3 MB) TX bytes:1775441 (1.7 MB)
Things are getting worse. I cannot access linuxquestions.org now. I keep getting redirected to 404.union77.com/?city=nj
I ran nmap on Ubuntu, I can't paste the output right now, as this is windows, but it worked fine, no errors. Also scanned www.linuxquestions.org from Ubuntu. It gave me:
I have my laptop and my girlfriends laptop on my desk. I am trying to look up a word at mdgb.net
Using my laptop and Ubuntu, the lookups keep getting slower, then time out.
Using my girlfriends laptop and Windows 8 (I think it is 8), I get the word instantly. We are on the same, my only router at home.
This tells me, something is not right in Linux. What might that be??
I just tried shutting down the webpage, then re starting it. Now I can look the word up on my laptop.
---------- Post added 05-17-14 at 01:34 AM ----------
I have my laptop and my girlfriends laptop on my desk. I am trying to look up a word at mdgb.net
Using my laptop and Ubuntu, the lookups keep getting slower, then time out.
Using my girlfriends laptop and Windows 8 (I think it is 8), I get the word instantly. We are on the same, my only router at home.
This tells me, something is not right in Linux. What might that be??
I just tried shutting down the webpage, then re starting it. Now I can look the word up on my laptop.
I have my laptop and my girlfriends laptop on my desk. I am trying to look up a word at mdgb.net
Using my laptop and Ubuntu, the lookups keep getting slower, then time out.
Using my girlfriends laptop and Windows 8 (I think it is 8), I get the word instantly. We are on the same, my only router at home.
This tells me, something is not right in Linux. What might that be??
I just tried shutting down the webpage, then re starting it. Now I can look the word up on my laptop.
Maybe I have a hardware problem, but then, why would some pages load and others not? I just started Fed 20 using xfce and Konqueror. All my pages are loading ok using wifi.
Maybe I found the problem. I carried my laptop into the living room, and not using the ethernet cable, everything loads fine, tonight anyway. Maybe just the ethernet port is dodgy. I'm going to run on wifi the next few days, see if that's the problem. Still can't understand why some sites would load and others not though.
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