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Groups > comp.os.linux.networking > #2413
| From | billy <billy@is.invalid> |
|---|---|
| Newsgroups | comp.os.linux.networking, alt.comp.freeware, alt.internet.wireless |
| Subject | Re: Frustrated that I don't UNDERSTAND why my network times out |
| Followup-To | comp.os.linux.networking, alt.internet.wireless |
| Date | 2013-10-09 11:09 +0000 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <l33ds9$btr$1@speranza.aioe.org> (permalink) |
| References | <l2vumu$4bj$1@speranza.aioe.org> <uclcia-a42.ln1@llondel.org> <anvdiax31m.ln2@news.roaima.co.uk> |
Cross-posted to 3 groups.
Followups directed to: comp.os.linux.networking, alt.internet.wireless
Chris Davies wrote:
> You can test this with ping -M, as David Hough has suggested. You can
> also reduce your own MTU and see whether this "fixes" the problem. Try
> "ifconfig eth0 mtu 1400", and experiment with different values.
Hi Chris,
I appreciate your help as I'm trying to UNDERSTAND the problem,
which is that, for months on end, I can't connect via the web
to http://centos.org where a traceroute shows that the penultimate
connection is dropping me. (So I am forced to use TOR and all
works fine - albeit slowly.)
Then, for months at a time, I *can* connect to centos.org,
where the traceroute shows the connection going through.
Googling for what an MTU is, I see it's the max size of a packet:
http://en.wikipedia.org/wiki/Maximum_transmission_unit
Ethernet has an MTU limit, it appears, of 1500 bytes, so I can
see why you're suggesting 1400 bytes.
I don't have much ethernet in the picture though, as I'm on
a laptop connected by WiFi to my home broadband router which
itself is wired by POE to a rooftop antenna which goes over
WiFi about five miles to the WISP antenna where I lose control.
So, I assume you would want me to modify that command:
ifconfig eth0 mtu 1400
To:
"ifconfig wlan0 mtu 1400
Here's what ifconfig just reported:
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:a0:00:3a:4f:23
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:11 Memory:f2600000-f2620000
wlan0 Link encap:Ethernet HWaddr 00:a0:00:6a:9b:3d
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:267437 errors:0 dropped:0 overruns:0 frame:0
TX packets:167343 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:311152648 (296.7 MiB) TX bytes:29413063 (28.0 MiB)
So I ran the following:
# ifconfig wlan0 mtu 1400
# ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:a0:00:6a:9b:3d
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1400 Metric:1
RX packets:267437 errors:0 dropped:0 overruns:0 frame:0
TX packets:167343 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:311152648 (296.7 MiB) TX bytes:29413063 (28.0 MiB)
And, then I tried to connect via Firefox to centos.org, but it still
timed out.
Should I change the mtu even further down, say, to 1000 so that
Firefox can connect to http://www.centos.org?
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Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-08 03:32 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "Gary R. Schmidt" <grschmidt@acm.org> - 2013-10-08 15:37 +1100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 14:26 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Thomas Keusch <fwd+usenet-spam2013q4-1381444031@spam2013q4.bsd-solutions-duesseldorf.de> - 2013-10-10 22:32 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out David Hough <noone$$@llondel.org> - 2013-10-08 07:30 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-08 19:32 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-10-08 23:16 +0300
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 17:39 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-09 11:28 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 18:52 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-10-09 22:47 +0300
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 20:50 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 21:30 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 01:05 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 01:09 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 19:51 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 20:42 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out ~BD~ <~BD~@nomail.afraid.org> - 2013-10-09 22:09 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 01:07 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out ~BD~ <~BD~@nomail.afraid.org> - 2013-10-10 07:41 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 21:36 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-09 15:51 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-10 00:15 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:19 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:33 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 10:54 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 11:09 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "ps56k" <pschuman_no5pam_m3@interserv.com> - 2013-10-10 16:34 -0500
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-10 22:40 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "ps56k" <pschuman_no5pam_m3@interserv.com> - 2013-10-10 18:27 -0500
Re: Frustrated that I don't UNDERSTAND why my network times out Thad Floryan <thad@thadlabs.com> - 2013-10-10 16:49 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 00:40 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Thomas Keusch <fwd+usenet-spam2013q4-1381456101@spam2013q4.bsd-solutions-duesseldorf.de> - 2013-10-11 01:50 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 03:24 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out dyrmak <dyrmak@orange.fr.invalid> - 2013-10-11 08:50 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:26 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-11 16:03 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 20:19 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-11 20:38 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-10-11 21:34 +0300
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-11 00:00 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 11:18 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2013-10-09 15:16 +0300
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 17:41 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-09 19:22 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 21:18 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Rick Jones <rick.jones2@hp.com> - 2013-10-09 20:44 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 21:46 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:39 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Rick Jones <rick.jones2@hp.com> - 2013-10-10 01:30 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 01:32 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2013-10-09 22:25 -0400
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 03:48 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-10 05:10 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out ein <ein@no.spam> - 2013-10-10 13:24 +0200
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-10 10:31 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-10 17:37 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-11 00:01 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 20:21 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-10 21:04 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 01:18 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-11 00:03 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 00:57 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 01:07 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Richard Kettlewell <rjk@greenend.org.uk> - 2013-10-11 08:56 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:47 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:58 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Rick Jones <rick.jones2@hp.com> - 2013-10-10 01:24 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Bit Twister <BitTwister@mouse-potato.com> - 2013-10-09 12:23 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Chris Davies <chris-usenet@roaima.co.uk> - 2013-10-09 19:27 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 21:21 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 21:47 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 10:43 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 10:51 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out nemesis <nemesis@home.it> - 2013-10-09 08:14 -0300
Re: Frustrated that I don't UNDERSTAND why my network times out "p-0''0-h the cat (ES)" <super.pooh@furryfreeware.invalid> - 2013-10-09 12:24 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out nemesis <nemesis@home.it> - 2013-10-09 08:42 -0300
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 13:57 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "p-0''0-h the cat (ES)" <super.pooh@furryfreeware.invalid> - 2013-10-09 15:09 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 11:27 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out nemesis <nemesis@home.it> - 2013-10-09 08:58 -0300
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 18:44 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 19:58 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 21:23 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 21:38 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-09 16:14 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:30 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-09 18:02 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out Rick Jones <rick.jones2@hp.com> - 2013-10-10 01:37 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-10 03:17 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 20:03 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 20:06 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-09 21:27 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 22:15 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-10 00:35 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "p-0''0-h the cat (ES)" <super.pooh@furryfreeware.invalid> - 2013-10-10 09:15 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 01:40 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out nemesis <nemesis@home.it> - 2013-10-10 23:03 -0300
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:43 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out ~BD~ <~BD~@nomail.afraid.org> - 2013-10-11 16:11 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-11 04:11 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 04:19 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 04:25 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-11 04:45 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out ein <ein@no.spam> - 2013-10-11 08:06 +0200
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:32 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:41 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:48 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Richard Kettlewell <rjk@greenend.org.uk> - 2013-10-11 09:00 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:30 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out Rick Jones <rick.jones2@hp.com> - 2013-10-14 19:20 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "p-0''0-h the cat (ES)" <super.pooh@furryfreeware.invalid> - 2013-10-11 10:17 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out billy <billy@is.invalid> - 2013-10-11 14:23 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "p-0''0-h the cat (ES)" <super.pooh@furryfreeware.invalid> - 2013-10-11 22:46 +0100
Re: Frustrated that I don't UNDERSTAND why my network times out Scott Hemphill <hemphill@hemphills.net> - 2013-10-14 16:47 -0400
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-09 16:17 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "ps56k" <pschuman_no5pam_m3@interserv.com> - 2013-10-10 16:41 -0500
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-10 15:16 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-10 15:18 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out "ps56k" <pschuman_no5pam_m3@interserv.com> - 2013-10-13 14:34 -0500
Re: Frustrated that I don't UNDERSTAND why my network times out Mike Easter <MikeE@ster.invalid> - 2013-10-13 14:27 -0700
Re: Frustrated that I don't UNDERSTAND why my network times out "ps56k" <pschuman_no5pam_m3@interserv.com> - 2013-10-17 14:58 -0500
Re: Frustrated that I don't UNDERSTAND why my network times out "petrus bitbyter" <petrus.bitbyter@hotmail.com> - 2013-10-11 22:17 +0200
Re: Frustrated that I don't UNDERSTAND why my network times out "petrus bitbyter" <petrus.bitbyter@hotmail.com> - 2013-10-11 22:42 +0200
Re: Frustrated that I don't UNDERSTAND why my network times out unruh <unruh@invalid.ca> - 2013-10-11 21:16 +0000
Re: Frustrated that I don't UNDERSTAND why my network times out "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2013-10-11 18:15 -0400
Re: Frustrated that I don't UNDERSTAND why my network times out "petrus bitbyter" <petrus.bitbyter@hotmail.com> - 2013-10-13 02:04 +0200
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