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Just landed at my desktop this mail from James. There are months that i'm searching for a VoIP app to use with OpenVPN. Does anybody - and Jimmy also - has some links to point for? Gnomemeeting? Never used but, could it be deplyoed in a "WAN/LAN" environement also? TIA, RSalles > Leo Vetterli <leo.vetterli@xxxxxxxxxxx> said: > >> Does anybody know if openvpn supports UDP Tunneling? I mean that the UDP >> Protocol on a Sub-LAN is tunneled with Openvpn to the LAN? > > Absolutely. People commonly tunnel NFS or VoIP over OpenVPN. Since > OpenVPN > fully supports UDP as the tunnel carrier, when you are tunneling a UDP > application stream, you get the clean encapsulation semantics of UDP over > UDP. > > The one gotcha to keep in mind is that when OpenVPN encrypts and > encapsulates > a UDP packet, some security-related overhead is added to the packet size. > > The result is that the MTU is somewhat less than it would be over a direct > connection with no VPN involved. This can create a performance bottleneck > or > even lock up the connection if IP fragmentation is disabled by routers in > the > path. > > OpenVPN has a workaround for this: the --fragment option which does > fragmentation internally. This is really a last-resort for intractable > fragmentation problems since it exacts a performance penalty. Note that > the > --mssfix option does not work in this case -- it's designed to work only > with > TCP streams which are tunneled over OpenVPN. > > The best solution is to lower the UDP MTU used by the application which is > being tunneled to a level just below the fragmentation threshold. > > James > > > > ------------------------------------------------------- > This SF.Net email sponsored by: ApacheCon 2003, > 16-19 November in Las Vegas. Learn firsthand the latest > developments in Apache, PHP, Perl, XML, Java, MySQL, > WebDAV, and more! http://www.apachecon.com/ > _______________________________________________ > Openvpn-users mailing list > Openvpn-users@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/openvpn-users > -- "A well-written program is its own heaven; a poorly-written program is its own hell." TAO of Programming - Book 4 ____________________________________________ Openvpn-users mailing list Openvpn-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/openvpn-users |