Re: UDP 1194 usage by several NAT devices

Michael <[email protected]>
Newsgroups gmane.comp.security.firewalls.m0n0wall
Message-ID <[email protected]>
Hello Jakob,

An mar., juin 29, 2010, Jakob Schwienbacher schrieb:
>On 29 June 2010 11:42, Michael <[email protected]> wrote:
>> [...]
>>
>> If I swap the m0n0wall router out for a cheap home router that does
>> full cone NAT then all devices can connect to the OpenVPN server.
>>
>> [...]
>>
>> The router (and NAT) configuration:
>>
>>  M0n0wall 1.32 embedded
>>
>>  Services: Proxy ARP       - No entries
>>  Firewall: NAT: Inbound    - No entries
>>  Firewall: NAT: Server NAT - No entries
>>  Firewall: NAT: 1:1        - No entries
>>
>>  Firewall: NAT: Outbound   - ...
>>    X 'Enable advanced outbound NAT'
>>    Interface   Source          Destination   Target
>>    WAN         192.168.1.0/24  *             * (no portmap)
>>
>> With this config I can connect one OpenVPN device, but the others
>> fail to connect. There are no other problems, NAT or otherwise.
>>
>Do you need the "Advanced outbound NAT" enabled? I have it just
>disabled and everythig works fine.
>
Good question. At least after I disable that, more than one device
can connect to the OpenVPN server, so the problem is solved.

The only question now is that I have a gut feeling that 'Advanced
outbound NAT' was enabled in the first place for a good reason.
That means I'll keep testing and hopefully discover that it can
be left disabled on my network.

Regards and thanks a lot,
Michael
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