fedora-users October 2011 archive
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fedora-users: Re: Unable to ssh nodes with global IP

Re: Unable to ssh nodes with global IP

From: Reindl Harald <h.reindl_at_nospam>
Date: Tue Oct 25 2011 - 12:34:44 GMT
To: Community support for Fedora users <users@lists.fedoraproject.org>

Am 25.10.2011 14:28, schrieb Abu Attar Musharih:
> On Sat, Oct 22, 2011 at 7:12 PM, Andras Simon <szajmi@gmail.com> wrote:
>
>> Can you ping the machine? If yes, then are there traces in the logs
>> that show the connection attempts? (You can make iptables log those.)
>
> Above is another important point. I can not ping the machine.
> I am wondering how they do that. What port do they close?

ping has no port nor is it TCP
ping is ICMP Type 8
as log you machine does not accept this it can not be pinged

so it is not sure if the ISP, some router or the machine himself
does not accept ICMP

this are the last two lines of all my firewalls
the first does accept ping and the second reject all
ports not explicitly opened

iptables -A INPUT -p icmp --icmp-type 8 -j ACCEPT
iptables -A INPUT -j REJECT

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