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Old 06-07-2011, 05:39 PM
Jorge Fábregas
 
Default Help with network

On 06/07/2011 01:23 PM, Eric Tanguy wrote:
> I can run telnet 192.168.1.14 5900 from local but not from another
> computer on the same network.

Maybe there's an ALLOW rule for traffic coming from the loopback...

> How can i know where the problem come from ?

Check your firewall rules. Try:

iptables -L -n

...and post it here if you don't mind.


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Jorge
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Old 06-07-2011, 05:46 PM
Eric Tanguy
 
Default Help with network

Le 07/06/2011 19:39, Jorge Fábregas a écrit :
> On 06/07/2011 01:23 PM, Eric Tanguy wrote:
>> I can run telnet 192.168.1.14 5900 from local but not from another
>> computer on the same network.
> Maybe there's an ALLOW rule for traffic coming from the loopback...
>
>> How can i know where the problem come from ?
> Check your firewall rules. Try:
>
> iptables -L -n
>
> ...and post it here if you don't mind.
>
>
> --
> Jorge
$ sudo iptables -L -n
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state
RELATED,ESTABLISHED
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW
udp dpt:137
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW
udp dpt:138
ACCEPT udp -- 0.0.0.0/0 224.0.0.251 state NEW
udp dpt:5353
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW
udp dpt:137
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW
udp dpt:138
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW
tcp dpt:139
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW
tcp dpt:445
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW
tcp dpt:22
REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with
icmp-host-prohibited

Chain FORWARD (policy ACCEPT)
target prot opt source destination
REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with
icmp-host-prohibited

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

So it seems that the configuration i made with system-config-firewall is
not here ?

Thanks
Eric

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Old 06-07-2011, 05:54 PM
JB
 
Default Help with network

Eric Tanguy <eric.tanguy <at> gmail.com> writes:

> ...
> I can run telnet 192.168.1.14 5900 from local but not from another
> computer on the same network.
>
> How can i know where the problem come from ?
> Thanks
> Eric
>

Perhaps ?
/etc/hosts.allow
/etc/hosts.deny

JB



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Old 06-07-2011, 11:08 PM
Jorge Fábregas
 
Default Help with network

On 06/07/2011 01:46 PM, Eric Tanguy wrote:
> So it seems that the configuration i made with system-config-firewall is
> not here ?

Exactly. I don't see anything related to tcp/5900 and udp/5900 there.
Actually the proper command to show all the details would have been:
iptables -L -n -v The third "ACCEPT" there (within the INPUT chain)
would make one believe it will allow everything but that's probably the
line related to the loopback interface. Check with the -v option.

I suggest you stop the firewall for a moment while doing your test. That
way you'll know for sure if it's the firewall that stopping you (and not
any network related service like xinetd etc).

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Jorge
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