Firewall Wizards mailing list archives
Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls
From: Frederick M Avolio <fred () avolio com>
Date: Wed, 27 Aug 2003 13:38:18 -0400
At 07:30 AM 8/27/2003 +0800, Bret Watson wrote:
OK maybe I forgot to give a detail..H.323 is the IP Telephony protocol.. Netmeeting uses it, but so does many other system, such as picturetel and cisco's stupidly expensive wifi IP phones..
Of course... This gets to my comments on asking the right question to determine the REAL REQUIREMENT. H.323 has many simultaneous connections. 2 or more are TCP. Up to 4 are UDP. All (except 1) are to ephemeral ports. Heck, you thought FTP was ugly! At least VoIP just needs H.323. NetMeeting (if we really mean NetMeeting) sucks in T.120 also. Even on a firewall that proxies all of these, you're talking 25 or so proxies for H.323 and 5 (whiteboarding, file transfer, chat, etc.) for T.120.
Fred Avolio Consulting, Inc. 16228 Frederick Road, PO Box 609, Lisbon, MD 21765, US +1 410-309-6910 (voice) +1 410-309-6911 (fax) http://www.avolio.com/ PGP Key Fingerprint: 928D 0903 934F 8CFA 6124 BBF6 0B45 93C7 3521 CEA0 _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Apple's iSight and Firewalls Jim Seymour (Aug 20)
- Re: Apple's iSight and Firewalls Bartek Krajnik (Aug 25)
- Setting up H323 IP telephony etc - was Re: Apple's iSight and Firewalls Bret Watson (Aug 26)
- Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Marcus J. Ranum (Aug 26)
- Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Paul Robertson (Aug 26)
- Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Frederick M Avolio (Aug 26)
- Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Bret Watson (Aug 27)
- Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Frederick M Avolio (Aug 27)
- Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Marcus J. Ranum (Aug 28)
- Setting up H323 IP telephony etc - was Re: Apple's iSight and Firewalls Bret Watson (Aug 26)
- Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Barney Wolff (Aug 27)
- Re: Re: Setting up H323 IP telephony etc - was Re: [fw-wiz] Apple's iSight and Firewalls Marcus J. Ranum (Aug 27)
- Re: Apple's iSight and Firewalls Bartek Krajnik (Aug 25)
- Re: Setting up H323 IP telephony etc - was Re: Apple's iSight and Firewalls Bartek Krajnik (Aug 28)
- <Possible follow-ups>
- RE: Apple's iSight and Firewalls Dave Killion (Aug 20)
- RE: Apple's iSight and Firewalls black (Aug 21)
- RE: Apple's iSight and Firewalls Dave Killion (Aug 21)