Traceroute not working as expected...

J

Jasey

New member
Hi All,

I have a strange network issue, and cant think of how to describe it, so am having problems googling the issue. I have asked around a few friends at work, and nobody here knows what is going on.

My basic network setup is a PC into a netgear switch into a linksys wireless adsl modem. Everything seems to be working too, which makes the issue all the more strange.

If I traceroute to another machine on t'internet, I get results like below:

C:\Users\Jasey>tracert -d www.gmail.com

Tracing route to googlemail.l.google.com [64.233.183.83]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 10.0.1.1
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 64 ms 61 ms * 64.233.183.83
12 62 ms 60 ms 79 ms 64.233.183.83
:nuts:
Everything in the middle is not responding. No matter what remote machine is, I get the same, everything in the middle times out:

C:\Users\Jasey>tracert -d www.theregister.co.uk

Tracing route to www.theregister.co.uk [212.100.234.54]
over a maximum of 30 hops:

1 1 ms <1 ms <1 ms 10.0.1.1
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 51 ms 50 ms 116 ms 212.100.234.54
:nuts: :nuts: :confused:
This also happens when my mobile phone is connected to my wireless router over its 54g connection - so this has ruled out my PC.

Also, assuming I messed something up on my modem router, I restored the very original config from when I first installed the thing. Exactly the same results.

t'internet is working, news servers are working, torrents are working, when I enable the FTP service, I can FTP into my PC - everything is working, just missing middle hops in a traceroute.

Anyone know what on earth is going on? I emailed my ISP (Freedom2Surf), but they havent got back to me.

Thanks,

Mega :confused: Jase
 
I only used the -d to stop it trying to resolve names - its pretty slow as it stands. Needless to say, without the -d is exactly the same end result (but slower at getting to it)
 
Soong said:
I'd say your firewall (likely) or your ISP (less likely) is blocking ICMP requests
Click to expand...
I would have thought so too - except that ping works, and up until perhaps a month or so ago (but only discovered last night), traceroute worked. Like I said before, I have done a reset on my modem, restoring a config from initial set up, and its still borked :(
 
These might be bad DNS servers on the internet. If a route cannot be found it will pass it on to the next one. What is your DNS set to on your router?
 
I dont think it is DNS - I was using OpenDNS before I spotted this strangeness, and when I reset my router it reverted back to my ISP's default DNS servers - so I have are ruled out DNS servers...
 
caveman-jim said:
I suspect this as well, combined with Vista's Black Hole Router detection methods.
Click to expand...
I (think) I have ruled out Vista as being the issue. I used my Windows Mobile phone to do a tracert using the wireless part of my router - exactly the same problems where it can only see the first and last ip addresses on the route. If I use my Windows Mobile at work, it gets through fine.

I am beginning to wonder if Rad2owns is onto something :)

Anyway, I am going to scour the internet for the latest firmware for my router, and reflash it to completely zap it beyond the hard reset I did earlier. If this doesn't work, the surely it has to be my ISP???

[Update] I have just bought a cheapo ADSL modem off of Ebay - now if this one shows the same problems, then it is either my ISP (or GCHQ) messing on!

Thanks for all the help though!
 
Last edited:
Sorted...

Sorted...

Well - sort of sorted.

It must have been my modem/router, but I cant work out why? I bought an identical router off of t'ebay, flashed it to the latest version, and configured it identically to my current one - and this one works. I spent far too long last night comparing screens of options, and could not find anything different.

I'm going to have to put this down to an exhausted modem... It has now retired to the costal resort of Scarborough... (at least, the weee bin anyway)

Thanks for help and suggestions!
 
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