Totally agree with Jiri. An ALG unnecessarily brings up the price of the ADSL modem as well.
--- Dhiraj Bhuyan Network Security Specialist, BT Exact Business Assurance Solutions
Tel: +44 1473 643932 Mob: +44 7962 012145 Email: dhiraj.2.bhuyan@bt.com
-----Original Message----- From: serusers-bounces@iptel.org [mailto:serusers-bounces@lists.iptel.org]On Behalf Of Jiri Kuthan Sent: 30 July 2004 10:46 To: andres@telesip.net; serusers@lists.iptel.org Subject: Re: [Serusers] Broken "SIP Aware" Router
At 11:40 PM 7/29/2004, Andres wrote:
We have started having problems with customers in BellSouths ADSL network. New customers are being given the Westell ADSL modem which appears to be "SIP Aware". But the implementation is terribly broken.
Well, I think that Application-Level-Gateways (ALGs) is _fundamentally_ broken concept with very negative impact on interoperability, security and software engineering.
There will be attempt to create an effort documenting these issues in the upcoming IETF meeting; till this effort brings fruits it will take some time. Some enlighted vendors are aware of this: Cisco/Linksys gave up on the idea to introduce SIP awareness in residential routers.
Thank you for your report.
-jiri
-- Jiri Kuthan http://iptel.org/~jiri/
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