Traceroute/Ping issues

rum · Posted: Sat Sep 14, 2002 3:37 pm Post subject: Traceroute/Ping issues

I have issues with performing a successful traceroute anywhere. Yet, I am still able to use the web and play games.

example:
traceroute slashdot.org
traceroute to slashdot.org (64.28.67.150), 30 hops max, 40 byte packets
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
etc..

also, on occasion I try to ping a website yet, i get no response.
Is this due to DoS prevention tatics?

ping slashdot.org
PING slashdot.org (64.28.67.150): 56 octets data

--- slashdot.org ping statistics ---
46 packets transmitted, 0 packets received, 100% packet loss

What must I set up to have these utilities work correctly?
_________________
Bad spellers of the world, untie!

rac · Posted: Sat Sep 14, 2002 5:02 pm Post subject:

It seems likely that there is a firewall somewhere upstream of you that drops these packets.
_________________
For every higher wall, there is a taller ladder

nemo_ · Posted: Thu Sep 19, 2002 1:06 am Post subject: /.

try pinging another site, slashdot always dropped pings for some reason

traceroutes not getting thru is definitely a firewall issue and since not a single host replies I guess it must be your local gateway

pilla · Posted: Thu Sep 19, 2002 1:49 am Post subject:

I think that dropping ICMP, ping, traceroute is in the current fashion, because of security issues....

sn1987a · n00b Joined: 30 Aug 2002 Posts: 26 Location: Houston Tx

Since you got not reply from anywhere, either you have a firewall on your machine filtering it out or you ISP is dropping them (or whoever your next hop is)

JWU42 · n00b Joined: 17 Aug 2002 Posts: 70 Location: Cornfields...

I have the same problem with this gentoo box. I am behind a Linksys router.

I am able to run traceroute to any of the machines on my lan. As soon as I go to the net (thru the router) I get no response.

What is weird, my other 3 win boxes run tracert just fine. I am not running ipchains...FWIW.

//Jeff

kashani · Posted: Thu Dec 12, 2002 2:18 am Post subject: tracert vs traceroute

Tracert on the Windows platform uses ICMP packets while traceroute for UNIX uses UDP packets. Therefore, yes, you will see different behavior between the two platfoms.

http://yunus.hacettepe.edu.tr/~bbm808/ping_tracert/birdseye.htm

Something that might help you troubleshoot is:

emerge tcptraceroute

kashani
_________________
Will personally fix your server in exchange for motorcycle related shop tools in good shape.

JWU42 · n00b Joined: 17 Aug 2002 Posts: 70 Location: Cornfields...

Thanks for the suggestion on tcptraceroute. Unfortunately it yields the same results as "traceroute" - get results on lan but not anything from the 'net.

I am guessing I need to change something in my router settings, just not sure what?!? :roll:

tdb · Posted: Fri Mar 14, 2003 6:46 pm Post subject:

I have the same problem. My Windows box can tracert just fine, but the linux one gives me all * * *'s. The solution is to use "traceroute -I hostname". This tells traceroute to use ICMP packets and not UDP packets. I guess it has something to do with the Linksys router. (I am behind one too)