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View Full Version : [ubuntu] Sometimes connection timeout in FireFox and SSH



khosro
January 31st, 2011, 08:29 AM
Hi,
Since two weeks ago,at work,i have sometimes connection timeout in my Firefox to visit some website ,such as http://seamframework.org (http://seamframework.org/) in my laptop,but i can see website like Google.But i have not the same problem with other computer in our network(Their OS are either Ubuntu or Windows).And also when i want to SSH to our server(it is located outside of our country) i got the same error(connection timeout) and again i do not have problem when i use another computer in the same network.But at home i do not have such problems.I am really confusing ,why this problem occurred!!!!????:mad:
It is also to mention that ,i use different ISP in work and home,but i think ,it does not related to ISP because other computers at work in the same network that use the same ISP do not have this problem.
And also i have searched in forum to find a solution and i found some posts regarding this problem,but none of them helped me.

Khosro.

prshah
January 31st, 2011, 10:08 AM
sometimes connection timeout in my Firefox to visit some website,but i can see website like Google.

Hi, I had a similar problem, you can take a look at my (solved) post (http://ubuntuforums.org/showpost.php?p=4514356&postcount=12) on this for a possible solution; you could also review the entire thread (http://ubuntuforums.org/showpost.php?p=4514356).

Hope it helps:

khosro
January 31st, 2011, 12:44 PM
Hi,
Thank you.I read entire post and i changed MTU from 1500 to 1492 and also to 1400 but without any success.And i also changed MTU by this command :


sudo ifconfig eth0 mtu 1492
but without any success.

and this is my output :


root@khosro-laptop:~# tracepath www.seamframework.org
1: khosro-laptop 0.250ms pmtu 1492
1: 192.168.1.1 2.192ms asymm 2
1: 192.168.1.1 1.908ms asymm 2
2: 91.186.200.193 80.579ms
3: 10.0.0.229 56.086ms
4: 10.0.0.228 66.960ms
5: 10.0.0.226 89.971ms asymm 6
6: 10.0.0.225 77.636ms asymm 5
7: 10.10.10.1 81.298ms
8: 217.218.146.141 112.582ms
9: 195.146.63.253 69.351ms
10: ldn-b1-link.telia.net 214.645ms asymm 17
11: ldn-bb1-link.telia.net 230.350ms asymm 17
12: ash-bb1-link.telia.net 286.088ms asymm 18
13: atl-bb1-link.telia.net 316.231ms asymm 19
14: internap-ic-140160-atl-bb1.c.telia.net 305.708ms asymm 18
15: border11.tge4-1-bbnet2.acs.pnap.net 303.617ms asymm 18
16: qts-36.border11.acs.pnap.net 336.470ms asymm 14
17: no reply
18: no reply
19: no reply
20: no reply
21: seamframework.org 386.175ms !H
Resume: pmtu 1492
root@khosro-laptop:~#

It seems i must reinstall Ubuntu.


Khosro.