nmap shows port filtered, but iptables/ipchains not running

Greetings all,

I ran an nmap of a machine that I am trying make an NFS server, and the
results showed that the machine's "priv-term-1", "sunrpc", "nfs" and a
bunch of "X11" ports are all filtered. The odd thing is that this
machine's ipchains service is turned off (and, regardless, all of the
chains are empty).

How else can ports be filtered in Linux, if the iptables/ipchains service
is not running?

Thanks,

Jeff

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In comp.os.linux.networking Jeff Krimmel <madscientistabc03@hotmail.com> suggested:
> Greetings all,

> I ran an nmap of a machine that I am trying make an NFS server, and the
> results showed that the machine's "priv-term-1", "sunrpc", "nfs" and a
> bunch of "X11" ports are all filtered. The odd thing is that this

You could try using 'rpcinfo/showmount' (man rpcinfo), which is
suited for this task.

> machine's ipchains service is turned off (and, regardless, all of the
> chains are empty).

> How else can ports be filtered in Linux, if the iptables/ipchains service
> is not running?

Perhaps:

man 5 hosts_access

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Michael Heiming (GPG-Key ID: 0xEDD27B94)
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On Sun, 27 Jun 2004 13:14:04 +0000, Michael Heiming wrote:

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>
> In comp.os.linux.networking Jeff Krimmel <madscientistabc03@hotmail.com>
> suggested:
>> Greetings all,
>
>> I ran an nmap of a machine that I am trying make an NFS server, and the
>> results showed that the machine's "priv-term-1", "sunrpc", "nfs" and a
>> bunch of "X11" ports are all filtered. The odd thing is that this
>
> You could try using 'rpcinfo/showmount' (man rpcinfo), which is suited
> for this task.

Both of these show an RPC error, even though the portmapper is running on
both machines.

>> machine's ipchains service is turned off (and, regardless, all of the
>> chains are empty).
>
>> How else can ports be filtered in Linux, if the iptables/ipchains
>> service is not running?
>
> Perhaps:
>
> man 5 hosts_access

Thanks, and the /etc/hosts.allow and /etc/hosts.deny files are both set up
to allow the appropriate connections.

Any other ideas?

Jeff

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In comp.os.linux.networking Jeff Krimmel <madscientistabc03@hotmail.com> suggested:
> On Sun, 27 Jun 2004 13:14:04 +0000, Michael Heiming wrote:
>> In comp.os.linux.networking Jeff Krimmel <madscientistabc03@hotmail.com>
>> suggested:
[..]
>> You could try using 'rpcinfo/showmount' (man rpcinfo), which is suited
>> for this task.

> Both of these show an RPC error, even though the portmapper is running on
> both machines.

Would you mind showing us the exact error message (cut&paste),
what does happen if you try 'rpcinfo -p localhost' on the nfs
server?

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Michael Heiming (GPG-Key ID: 0xEDD27B94)
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