Re: [gentoo-server] Detect where a connection drop occurs

[Mateusz Arkadiusz Mierzwinski <mateuszmierzwinski@gmail.com>]

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Hi,

1. netstat -ant
2. if returns 0.0.0.0:548 its ok
3. else: check your service if it's connected to VPN interface only.

4. Traceroute to HOST not PORT. Port pinging can be blocked by your
Internet Provider.
5. Check Your IPtables rules if You don't block any ports or set connlimit,
rejects etc.: iptables -L
6. Check Your IDS software like Prelude/Snort.

Best regards,
MM


2013/2/22 Vinícius Ferrão <viniciusferrao@if.ufrj.br>

> Hello dudes,
>
> I've configured an service and I know it's working normally through TCP
> port 548. But I'm only able to connect to it using a VPN connection.
>
> I need to debug it detecting where (in which hop) the connection is being
> dropped.
>
> Any ideias on how to do that?
>
> I've tried tcptraceroute without success:
>
> sudo tcptraceroute www.mydomain.com 548
> Selected device en0, address 172.16.144.115, port 49302 for outgoing
> packets
> Tracing the path to www.mydomain.com (146.164.36.7) on TCP port 548
> (afpovertcp), 30 hops max
>  1  172.16.144.1  0.769 ms  0.598 ms  0.686 ms
>  2  * * *
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> Thanks in advance,
>
>
>  *Vinícius Ferrão*: Administrador de Sistemas
> www.ferrao.eti.br | +55 (21) 8888-2619
>
>

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