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Author Topic: Internet problems  (Read 4220 times)

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cem_devecioglu

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Re: Internet problems
« Reply #30 on: 29 January 2011, 22:32:01 »
Quote
Quote
this may be useful.. please check..
http://www.dslreports.com/faq/695


MTU is set to 1400 as per AOHell instructions .. :)

ideas finished :-/
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Taxi_Driver

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Re: Internet problems
« Reply #31 on: 30 January 2011, 09:30:07 »
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Quote
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flushdns done - several times..

No access to another router
:(

If you wish to borrow one Mr E to rule out your router.....i have a spare usb and a spare wifi one   :)


I might well take you up on that offer .. you around tomorrow ??

Will be late afternoon.....give me a ring if/when you want it  :y
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TheBoy

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Re: Internet problems
« Reply #32 on: 30 January 2011, 09:58:37 »
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OK .. understand now .. :)  Just stuck them in the router and rebooted .. off to try now ..

Don't understand the free proxie bit mind .. :(

free proxies hide your ip (not sure will work for your case) but may use an alternative route

also I ckecked the ip's from

http://www.ip-adress.com/whois/



seems BT server :-? 
I reconise that IP  :-[
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Grumpy old man

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Re: Internet problems
« Reply #33 on: 30 January 2011, 10:06:28 »
Right, you're all quick to blame the ISP, but it might not be (directly) their fault.

The ISPs only run small networks with links generally to the large hubs such as Telehouse and Telecity, and rely on larger transit providers, such as Level 3, from there on.

The transit providers tend to have resilient links, but as with all IT, generally relies on all the equipment cooperating properly. As always with IT, under failure conditions, reality doesn't always match the test conditions when the infrastructure was designed and tested. Been there, done that. Enjoyed it so much, its almost a weekly pleasure :(



Entwood - if the names are resolving to IPs, that (almost) rules out DNS issues.  You need to study the traceroutes to see if they are all going via the same transit, and stopping at same point.

Additionally, remember virtually all infrastructure routers will prioritise real traffic over icmp echo-request and icmp echo-reply, making ping and tracert less useful than some people believe.
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Grumpy old man

Plomien

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Re: Internet problems
« Reply #34 on: 30 January 2011, 10:51:10 »
Quote
Quote
Quote
this may be useful.. please check..
http://www.dslreports.com/faq/695


MTU is set to 1400 as per AOHell instructions .. :)

ideas finished :-/
AOHell used to be through Virgin at one point (I know route shows BT) but try setting MTU to 1450 which may sort it.
the issue looks to be setting on the pc or router rather than connection. Did you try another pc on the connection? also is it wired or wireless?
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bertiecbx550

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Re: Internet problems
« Reply #35 on: 30 January 2011, 10:56:22 »
failing that i`m sure TB wil let you borrow Sammy sledge..... ;D ;D ;D
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Entwood

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Re: Internet problems
« Reply #36 on: 30 January 2011, 11:12:00 »
Quote
Right, you're all quick to blame the ISP, but it might not be (directly) their fault.

The ISPs only run small networks with links generally to the large hubs such as Telehouse and Telecity, and rely on larger transit providers, such as Level 3, from there on.

The transit providers tend to have resilient links, but as with all IT, generally relies on all the equipment cooperating properly. As always with IT, under failure conditions, reality doesn't always match the test conditions when the infrastructure was designed and tested. Been there, done that. Enjoyed it so much, its almost a weekly pleasure :(



Entwood - if the names are resolving to IPs, that (almost) rules out DNS issues.  You need to study the traceroutes to see if they are all going via the same transit, and stopping at same point.

Additionally, remember virtually all infrastructure routers will prioritise real traffic over icmp echo-request and icmp echo-reply, making ping and tracert less useful than some people believe.


TB .. thanks for that ... I'm now completely bamboozled .... I thought I'd be clever and type up some that failed and some that worked ...

Example of those that fail : ...using tracert www.bt.com it resolves to

tracing route to www.bt.com [62.239.237.2] then does 12 hops and fails at 62.172.57.218

and it will do that everytime without changing, even after rebooting both router and computer, dns flush whatever

tracert www.moneyfacts.co.uk resolves to

tracing route to www.moneyfacts.co.uk [213.121.201.156]

does 11 hops and fails at 195.99.110.182

I then thought I'd do omegaowners.com as its a site that works .... but tracert failed after 11 hops !!!

So tracert doesn't seem to be telling me anything accurate .. :(

EDIT :

Only common feature is the fact they fail after 11/12hops .. that make any sense to anyone ??

EDIT2 : Young lady in India informs me that I'm the only person in the world with this problem. She has no idea what the problem could be and is 2escaliting" it .. but it could be 48 hours before I get a response.

Going to try a factory reset on the router. :(
« Last Edit: 30 January 2011, 11:47:38 by entwood »
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Entwood

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Re: Internet problems
« Reply #37 on: 30 January 2011, 11:49:46 »
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flushdns done - several times..

No access to another router
:(

If you wish to borrow one Mr E to rule out your router.....i have a spare usb and a spare wifi one   :)


I might well take you up on that offer .. you around tomorrow ??

Will be late afternoon.....give me a ring if/when you want it  :y


Looks like I might .. lost your phone number when I got back from Aus and faffed with the different sim cards ... could you PM it to me again and I'll give you a bell  :)
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Taxi_Driver

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Re: Internet problems
« Reply #38 on: 30 January 2011, 12:08:46 »
Quote
Quote
Right, you're all quick to blame the ISP, but it might not be (directly) their fault.

The ISPs only run small networks with links generally to the large hubs such as Telehouse and Telecity, and rely on larger transit providers, such as Level 3, from there on.

The transit providers tend to have resilient links, but as with all IT, generally relies on all the equipment cooperating properly. As always with IT, under failure conditions, reality doesn't always match the test conditions when the infrastructure was designed and tested. Been there, done that. Enjoyed it so much, its almost a weekly pleasure :(



Entwood - if the names are resolving to IPs, that (almost) rules out DNS issues.  You need to study the traceroutes to see if they are all going via the same transit, and stopping at same point.

Additionally, remember virtually all infrastructure routers will prioritise real traffic over icmp echo-request and icmp echo-reply, making ping and tracert less useful than some people believe.


TB .. thanks for that ... I'm now completely bamboozled .... I thought I'd be clever and type up some that failed and some that worked ...

Example of those that fail : ...using tracert www.bt.com it resolves to

tracing route to www.bt.com [62.239.237.2] then does 12 hops and fails at 62.172.57.218

and it will do that everytime without changing, even after rebooting both router and computer, dns flush whatever

tracert www.moneyfacts.co.uk resolves to

tracing route to www.moneyfacts.co.uk [213.121.201.156]

does 11 hops and fails at 195.99.110.182

I then thought I'd do omegaowners.com as its a site that works .... but tracert failed after 11 hops !!!

So tracert doesn't seem to be telling me anything accurate .. :(

EDIT :

Only common feature is the fact they fail after 11/12hops .. that make any sense to anyone ??

EDIT2 : Young lady in India informs me that I'm the only person in the world with this problem. She has no idea what the problem could be and is 2escaliting" it .. but it could be 48 hours before I get a response.

Going to try a factory reset on the router. :(

I think traceroute is giving you a 'red herring' Entwood.
I tried the same tests as you....

www.bt.com failed at the same point for me as well (altho their website works fine for me)

www.moneyfacts.co.uk also failed at the same point (again their website works fine for me)

omegaowners.com tho did work for me.....it got a timeout at hop 10 but then succeeded on hop 11

Points to note-
traceroute on www.bt.com and www.moneyfacts.co.uk both failed on a bt hub at birmingham/ilford on hop 11.

Pinging these sites doesnt work either.....so i suspect these web servers are set not to reply to pings.....and using traceroute, hop 11 is the actual web server and therefore not going to reply.
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Entwood

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Re: Internet problems
« Reply #39 on: 30 January 2011, 12:32:24 »
Makes sense TD .. but where to go from here ?? Done a full factory reset on the router. .. no change.

Next thing I'm going to try is using the phone a s a wireless point, see if the computer gets to those sites that way .... if it does its router or phone line ..

Probably ring you in 30 minutes or so asking to visit you and collect a router !!

:)
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cem_devecioglu

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Re: Internet problems
« Reply #40 on: 30 January 2011, 13:47:33 »
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failing that i`m sure TB wil let you borrow Sammy sledge..... ;D ;D ;D

best solution ;D ;D ;D
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cem_devecioglu

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Re: Internet problems
« Reply #41 on: 30 January 2011, 14:00:13 »
imo well explained and may be of some use
http://www.exit109.com/~jeremy/news/providers/traceroute.html

however, really using a different router and pc combination may give more hints.. if they fail also the supplied connection is definitely faulty..


seems you will be expert soon Entwood ;D :y
« Last Edit: 30 January 2011, 14:05:32 by cem_devecioglu »
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Entwood

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Re: Internet problems
« Reply #42 on: 30 January 2011, 14:11:07 »
Sorry for being so long... but latest attempts ...

Factory reset of router - No difference at all
Connect router to computer via ethernet cable - No difference at all

Connect Computer via USB tethering to phone - works perfectly
Connect laptop via USB tethering to phone - works perfectly

Connect laptop via phone Wi-Fi hotspot - works slowly but OK
Connect computer via phone wifi hotspot - get asked to supply a certificate all the time when trying to set up WPA (TKIP) which is what the phone is set to.

Move the whole caboodle to the front door and plug directly into the main BT socket - no difference

Seems to me the only things left are the router itself or the line.

About to phone Dave to borrow a router .. :)

Any more ideas gratefully accepted. I can't even do a "proper" search for an alternate ISP at the moment as half the sites I try I can't get to !!

p******off Disgruntled of Wiltshire.
« Last Edit: 30 January 2011, 14:24:16 by entwood »
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cem_devecioglu

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Re: Internet problems
« Reply #43 on: 30 January 2011, 14:37:52 »
Entwood , lastly you can make a test
with "Remote Traceroute Tools"

try back tracerouting your ip from australia , russia etc

but it seems to me that there are some firewalls or special setting at BT that stop trace route.

http://www.traceroute.org/#United%20Kingdom

there are many country sites that provide back trace..

you can get your ip from
http://www.whatismyip.com/


also a network analysing tool (trial for 10 days)

gives good info


you can download from here (if you can reach :-/)

http://www.pathanalyzer.com/download.opp
« Last Edit: 30 January 2011, 14:50:18 by cem_devecioglu »
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Entwood

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Re: Internet problems
« Reply #44 on: 30 January 2011, 15:00:02 »
Thanks Cem .. downloading now .. :)
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