Date: Mon, 6 Mar 2000 15:12:47 -0800 (PST) From: Bhishan Hemrajani <bhishan@cytosine.dhs.org> To: Randy Primeaux <randy@Cloudfactory.ORG> Cc: freebsd-questions@freebsd.org Subject: Re: NetMeeting or H.323 with ipfw & natd Message-ID: <200003062312.PAA04865@cytosine.dhs.org> In-Reply-To: <200003062217.OAA19618@relay.ultimanet.com> from Randy Primeaux at "Mar 6, 2000 02:08:14 pm"
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Actually, looking more closely at Netmeeting, you cannot find out what port it is running on. Take a look at this windows NAT help page: http://www.winroute.com/manual/v4.0r/index.htm They provide port numbers for numerous software products. You might want to try and ask them about what port netmeeting uses, if you really need to use it. I recommend www.icuii.com. Just redirect port 2000-2038 for the ports and it will work. --bhishan > I said: > > > Is it possible to configure natd to support H.323 videoconferencing > > > gateway for NetMeeting or cu-seeme? > > > Should I consider MBONE tools? > > Issue: I can transmit MS NetMeeting video/audio through ipfw/natd but > not receive. > > Bhishan Hemrajani writes: > > Find out the port that netmeeting uses, and redirect it > > with natd. > > Bhishan, > I currently run `/sbin/natd -interface ed0 -n ed0`. > > Are you suggesting?: > /sbin/natd -interface ed0 -n ed0 -redirect_port tcp 192.168.144.4:1503 1503 -redirect_port tcp 192.168.144.4:1720 1720 -redirect_port tcp 192.168.144.4:1731 1731 > > (I think the LDAP on 389 passes through OK. maybe.) > > Please be more specific. What tools could I use to figure this out? > I've noticed that the NetMeeting Software on Win98 picks up it's > nat'ed private address (192.168.144.4 /24). I don't know for fact, > but I suspect Z-end client tries to route back to this address, not my > public interface. (Using iVisit instead of NetMeeting resolved this > issue). Is it possible the source private-address is encapsulated > within the outgoing packet, or reported to the LDAP Internet Locator > Service directory? > > I show the folowing in my /etc/services table: > ldap 389/tcp #Lightweight Directory Access Protocol > ldap 389/udp #Lightweight Directory Access Protocol > ulp 522/tcp > ulp 522/udp > imtc-mcs 1503/tcp #Databeam > imtc-mcs 1503/udp #Databeam > > > According to > http://www.microsoft.com/windows/NetMeeting/Corp/reskit/Chapter4/default.asp: > > MS NetMeeting uses > Port Function Outbound Connection > 389 Internet Locator Service (ILS) TCP > 522 User Location Service TCP > 1503 T.120 TCP > 1720 H.323 call setup TCP > 1731 Audio call control TCP > Dynamic H.323 call control TCP > Dynamic H.323 streaming Real-Time Transfer Protocol (RTP) over UDP > > If you use a firewall to connect to the Internet, it must be > configured so that the IP ports are not blocked. > > To establish outbound NetMeeting connections through a firewall, the > firewall must be configured to do the following: > > * Pass through primary TCP connections on ports 389, 522, 1503, 1720, > and 1731. > * Pass through secondary TCP and UDP connections on > dynamically assigned ports (1024-65535). > > The H.323 call setup protocol dynamically negotiates a TCP port for > use by the H.323 call control protocol. Also, both the audio call > control protocol and the H.323 call setup protocol dynamically > negotiate UDP ports for use by the H.323 streaming protocol, called > the Real-Time Transfer Protocol (RTP). In NetMeeting, two UDP ports > are determined on each side of the firewall for audio and video > streaming, for a total of four ports for inbound and outbound audio > and video. These dynamically negotiated ports are selected arbitrarily > from all ports that can be assigned dynamically. > > NetMeeting directory services require port 389. Microsoft Internet > Locator Service (ILS) servers, which support the Lightweight Directory > Access Protocol (LDAP) for NetMeeting, also require port 389. > > Bhishan Hemrajani writes: > > Find out the port that netmeeting uses, and redirect it > > with natd. > > > > --bhishan > > > > > Is it possible to configure natd to support H.323 videoconferencing > > > gateway for NetMeeting or cu-seeme? > > > > > > Should I consider MBONE tools? > > > -- > > > Randy Primeaux > > > randy@cloudfactory.org http://cloudfactory.org/~randy > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > > > -- > Randy Primeaux > randy@cloudfactory.org http://cloudfactory.org/~randy/ > tranze@hyperreal.org http://hyperreal.org/~tranze/ > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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