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2 Replies Last post: Feb 17, 2010 10:05 PM by mparadis  
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mparadis
95 posts since
Oct 2, 2009

Feb 17, 2010 12:35 AM

opensbc alg

Someone on a mailing list was telling me that vyatta/opensbc is in fact ALG based. I have since been testing centos/opensbc with iptables. Can someone tell me if this is true, that opensbc amounts to an ALG firewall?
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joegen
519 posts since
Apr 28, 2007
1. Feb 17, 2010 6:47 PM in response to: mparadis
Re: opensbc alg
I don't think it would be appropriate to call a B2B UA as an ALG. ALGs are very generic beasts that merely rewrites contacts and vias to reflect the NAT binding. Advance ALGs might even support RTP proxying via SDP manipulation. However, unlike a B2BUA, ALGs normally do not preserve dialog states. If I were to code an ALG, i would see myself writing generic handlers for SIP messages that has one sole function of rewriting contacts and vias. That's a far cry from the complex behavior of an SBC.
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mparadis
95 posts since
Oct 2, 2009
2. Feb 22, 2010 8:26 AM in response to: joegen
Re: opensbc alg
I wonder if the person could have meant something else?

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