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sblantipodi
PostPosted: Fri Jun 19, 2009 3:51 pm 
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Location: Italy
Hi,
I have a linode running CentOS 5.3...

When I try to
traceroute a domain name I got this error:
traceroute to mentadent.it (162.61.224.225), 30 hops max, 40 byte packets
send: Operation not permitted

and on whois I got this one:
whois mentadent.it
[Querying whois.nic.it]
[Unable to connect to remote host]


why?
thanks!
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Vance
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PostPosted: Sat Jun 20, 2009 1:28 am 
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Traceroute works for me from Atlanta on CentOS 5.3. Don't have whois installed, but I can ping whois.nic.it though.
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waldo
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PostPosted: Sat Jun 20, 2009 1:40 am 
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Both work for me in Fremont. I'd take a look at your firewall settings.

Are you able to ping www.google.com?
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sblantipodi
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PostPosted: Sat Jun 20, 2009 4:22 am 
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waldo wrote:
Both work for me in Fremont. I'd take a look at your firewall settings.

Are you able to ping www.google.com?


I can ping it but I cannot traceroute it or whois it.
Please help.
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Deckert
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PostPosted: Sat Jun 20, 2009 6:21 am 
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Hi,

Definitely take a look at your firewall. Traceroute uses ICMP and high UDP-port probes to do its thing. Maybe try dropping your firewall for a few seconds, do the traceroute, then re-enable your firewall.

--deckert
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sblantipodi
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PostPosted: Sat Jun 20, 2009 1:23 pm 
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Deckert wrote:
Hi,

Definitely take a look at your firewall. Traceroute uses ICMP and high UDP-port probes to do its thing. Maybe try dropping your firewall for a few seconds, do the traceroute, then re-enable your firewall.

--deckert


you are right thanks :)
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marcus0263
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PostPosted: Thu Jun 25, 2009 9:50 pm 
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To save on the headaches I use tcptracroute :wink:

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sblantipodi
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PostPosted: Fri Jun 26, 2009 7:40 am 
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marcus0263 wrote:
To save on the headaches I use tcptracroute :wink:


is there something similar also for whois?
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Stever
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PostPosted: Fri Jun 26, 2009 11:45 am 
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sblantipodi wrote:
marcus0263 wrote:
To save on the headaches I use tcptracroute :wink:


is there something similar also for whois?

Whois uses tcp or udp already. Make sure you have outgoing port 43 open in your firewall.
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marcus0263
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PostPosted: Fri Jun 26, 2009 3:31 pm 
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Stever wrote:
sblantipodi wrote:
marcus0263 wrote:
To save on the headaches I use tcptracroute :wink:


is there something similar also for whois?

Whois uses tcp or udp already. Make sure you have outgoing port 43 open in your firewall.

Better yet just do a "whois" on your own workstation, not your server ;)

Why open another port on your server when you don't need to?

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sleddog
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PostPosted: Fri Jun 26, 2009 8:09 pm 
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marcus0263 wrote:
Stever wrote:
sblantipodi wrote:
marcus0263 wrote:
To save on the headaches I use tcptracroute :wink:


is there something similar also for whois?

Whois uses tcp or udp already. Make sure you have outgoing port 43 open in your firewall.

Better yet just do a "whois" on your own workstation, not your server ;)

Why open another port on your server when you don't need to?


Well it's an outgoing port. Seems to me that if you're that concerned about blocking outgoing traffic, then something nasty must be happening inside your VPS. But I could be misunderstanding this discussion....
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marcus0263
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PostPosted: Sat Jun 27, 2009 9:50 am 
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sleddog wrote:
marcus0263 wrote:
Stever wrote:
sblantipodi wrote:
marcus0263 wrote:
To save on the headaches I use tcptracroute :wink:


is there something similar also for whois?

Whois uses tcp or udp already. Make sure you have outgoing port 43 open in your firewall.

Better yet just do a "whois" on your own workstation, not your server ;)

Why open another port on your server when you don't need to?


Well it's an outgoing port. Seems to me that if you're that concerned about blocking outgoing traffic, then something nasty must be happening inside your VPS. But I could be misunderstanding this discussion....

Nah it's just a case of why open the port when you don't need to? Just do the whois on your workstation

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