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Old 09-22-2004, 07:22 AM   #1
terrylam77
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Registered: Sep 2004
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Smile traceroute and xtraceroute are not working


Hi, all Linux expert,

Can anyone please help me as my traceroute and xtraceroute are not working . Both give me no response.

1. * * *
2. * * *

I have no problem surfing internet.

I have a cable modem which connect to a Linksys router and then to my Linux PC. I heard that some expert in this forum say traceroute is using UDP by default. So is there any way that I can set it to TCP by default?


But for xtraceroute, how do I make it work ? is there anything that I can set to make it work?? currently I can see is only the globe and it always give me no response.

Please help! Thank you!

Terry
 
Old 09-22-2004, 12:35 PM   #2
Lleb_KCir
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Registered: Nov 2003
Location: Orlando FL
Distribution: Debian
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for starters you need to be root to run either of those IIRC, and second off with your linksys router do you have it configured for blackice? IIRC the blackice firewall that can be ran inside the linksys router will cause some issues with pings and tracerts etc...
 
Old 09-27-2004, 07:53 PM   #3
zoroirooni
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Registered: Sep 2004
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i have the exact same problem as terrylam77,

Here is my situation:
- I am using a Sony laptop running redhat 9.0
- I connect wirelessly to a Linksys router
- which is in turn connected to my adsl modem

I can ping fine, and I can do traceroute via command line. But when i put in the right IP in Xtraceroute it takes a very long time and I get no response:

1. * * *
2. * * *


I have read Lleb_KCir's answer but do not undrestand. Could you give me a bit more information as how to solve this issue?

thanks,


Zoro
 
Old 09-29-2004, 01:15 PM   #4
Lleb_KCir
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Registered: Nov 2003
Location: Orlando FL
Distribution: Debian
Posts: 1,765

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the Linksys routers have the ability to use BLACKICE as part of their firewall. this is a 3rd party software based firewall that normally runs on a windows OS

BlackICE

go there to read up more on that software. if you have blackice enabled in your linksys router it is possible that the software is blocking your traceroute requests. not saying that is the answere, but it is a possibility.

when you run xtracert in your RH box, are you being prompted for the root access? you should be, IIRC you need root level access to do that type of action. been a while since i ran the tracert inside the GUI on my RH9 box. nice tool btw.
 
Old 09-30-2004, 06:55 PM   #5
zoroirooni
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Registered: Sep 2004
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Aha

When I run the different "trace" tools, I am root. That inlcudes both traceroute and xtraceroute as a GUI.

I have even contacted Linksys, without any luck.

I am still working on the problem. Once i get an answer I will post it here. Cheers.

Zoro
 
Old 10-01-2004, 02:26 AM   #6
zoroirooni
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Registered: Sep 2004
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Unhappy still no go

I checked the linksys wireless router. It is the WRT51AB.

After loggin in, i looked around. could not find Blackice.

I simply do not undrestand what is going on!
 
Old 10-02-2004, 12:54 AM   #7
zoroirooni
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Registered: Sep 2004
Posts: 6

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Talking PROBLEM SOLVED!!!!!!!!

Well here we are...........

I finally got it to work....

The problem is in the fact that "traceroute" is using UDP.
The wireless linksys router blocks that by default.

So, by changing the UDP packet and having traceroute using ICMP, basically we can trace out of the network.

the command for changing UDP to ICMP is:

traceroute -I <destination IP>


Cheers,

Zoro Irooni
 
  


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