sorocco Posted July 11, 2007 Report Share Posted July 11, 2007 hello.. I am ON mandrake 10.1 , just installed few days back and it is now connected in my lan with 2 pc;s (windows xp pro ), my problem is when i try to give command traceroute any_WAN_IP ...it shows my adsl modem/router as first hoope and than ..*** ..for next forthcomming 30 hops. at the same time i am getting response from my windows pc no problem at all....ii am able to ping the same IP ..no DNS probllem ...any idea about this ? my lan connection is as : adsl modem/router (192.168.1.1 )--->> linksys access point (192.168.2.1) acting as DHCP --->> PC!,PC2 and Mandrake PC all the PC's are on DHCP. see the logs .. traceroute: unknown host google.comm [root@localhost root]# traceroute google.com traceroute: Warning: google.com has multiple addresses; using 72.14.207.99 traceroute to google.com (72.14.207.99), 30 hops max, 38 byte packets 1 192.168.1.1 (192.168.1.1) 1.541 ms 1.082 ms 1.048 ms 2 * * * 3 * * * 4 * * * [root@localhost root]# ping google.com PING google.com (64.233.187.99) 56(84) bytes of data. 64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=2 ttl=237 time=383 ms 64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=3 ttl=237 time=383 ms 64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=4 ttl=237 time=384 ms Thanks Quote Link to comment Share on other sites More sharing options...
ianw1974 Posted July 12, 2007 Report Share Posted July 12, 2007 As far as I know, this is normal nowadays for traceroute. Are you saying traceroute works in Windows but not in Linux? Or are you saying that Windows is working properly in that it can make DNS queries and access the internet? And that your Linux machine cannot? Quote Link to comment Share on other sites More sharing options...
sorocco Posted July 12, 2007 Author Report Share Posted July 12, 2007 you can see from log ..i am able to ping from my mandrake box but not traceroute ..and i can browse the net too.. with no problem at all....at the same time my windows xp machines are doing tracert ...why not mandrake ..???....i am reaching my default gateway (dsl modem/router ) but after gateway just stars.. Quote Link to comment Share on other sites More sharing options...
Greg2 Posted July 12, 2007 Report Share Posted July 12, 2007 It appears to be a firewall blocking the unsolicited UDP? Use ICMP ECHO instead of UDP datagrams, do traceroute -I google.com Quote Link to comment Share on other sites More sharing options...
sorocco Posted July 12, 2007 Author Report Share Posted July 12, 2007 thax.. its working now ..so every time i have to add this -I in command ..??? Quote Link to comment Share on other sites More sharing options...
Greg2 Posted July 13, 2007 Report Share Posted July 13, 2007 thax..its working now ..so every time i have to add this -I in command ..??? If you do cat /etc/services |grep traceroute you will find: traceroute 33434/tcp traceroute 33434/udp What's happening is that udp/ip is the default traceroute in Linux and Unix. From man traceroute: Traceroute utilizes the IP protocol ‘time to live'field and attempts to elicit an ICMP TIME_EXCEEDED response from each gateway along the path to some host. Your router is probably configured to discard all packets begging for "TIME_EXCEEDED", or discard all "TIME_EXCEEDED" ICMP traffic. You may be able to upgrade your router (gateway) firmware to correct this? Or call the manufacturer of the router and ask them for help in resolving this. Or you could just use the -I option. :) Quote Link to comment Share on other sites More sharing options...
sorocco Posted July 13, 2007 Author Report Share Posted July 13, 2007 thax greg2 .. right now i am not able to get you completly ..but its a nice explanation. Quote Link to comment Share on other sites More sharing options...
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