[Serusers] Firewall and NAT

[Jiri Kuthan]

I think mediatrix has had sip support since long time, perhaps it is
just about firmware upgrade. Unfortunately, several people here on
the mailing list questioned its interoperability cpabilities.

-jiri

At 06:18 PM 7/23/2003, Director General: NEFACOMP wrote:
>I have got an H323 Mediatrix FXO gateway. It is not SIP based. May I use it
>with SER?
>
>
>Thanks
>Emery
>----- Original Message -----
>From: "Klaus Darilion" <darilion at ict.tuwien.ac.at>
>To: "Rich Adamson" <radamson at routers.com>; <serusers at lists.iptel.org>
>Sent: Wednesday, July 23, 2003 15:38
>Subject: RE: [Serusers] Firewall and NAT
>
>
>I think its this way:
>
>FXO-interface: connects to the PSTN network an behaves like a normal phone
>the PSTN network.
>
>FXS-interface: connects to phone and behaves like a PSTN network to the
>phone (acts as a power supply for the phone).
>
>Simple scenario:
>
>Analog Phone <---> FXS + PC <----VoIP----> PC + FXO (=Gateway) <---->PSTN
>
>
>regards,
>Klaus
>
>-----Original Message-----
>From: Rich Adamson [mailto:radamson at routers.com]
>Sent: Wed 23.07.2003 14:23
>To: serusers at lists.iptel.org
>Cc:
>Subject: Re: [Serusers] Firewall and NAT
>> >We are using Check Point firewall I configured this
>> >server to allow both way in/out and NATED with public
>> >IP.
>> >For testing purpose I kept all ports opened in the
>> >firewall, for this particular server. I don’t why I am
>> >not able to register it.
>
>Might take a closer look at the Checkpoint to see if it is
>doing Port Address Translation (PAT) in addition to NAT.
>If I recall correctly, the older versions of Checkpoints
>software did PAT, which caused folks problems when an app
>wanted to use specific tcp/udp port numbers (for example,
>when trying to use an non-checkpoint VPN box on the inside
>of the checkpoint).
>
>> >Which is better PSTN gateway. We are looking at 1 to 2
>> >FXS port at this time for testing purpose.
>>
>> ? FXS is a PSTN-phone-2-IP gateway, isn't it? The most
>> popular is cisco's ata.
>
>Think the FXS is a Foreign Exchange interface intended to tie
>a ser-accessible gateway to a telephone/pbx line (not to a
>telephone instrument).
>
>
>
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--
Jiri Kuthan            http://iptel.org/~jiri/