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    pritam_askme's Avatar
    pritam_askme Posts: 3, Reputation: 1
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    #1

    May 26, 2008, 12:34 AM
    What are the protocols used by VPN?
    What are the protocols used by VPN?
    Clough's Avatar
    Clough Posts: 26,677, Reputation: 1649
    Uber Member
    		  
    #2

    May 26, 2008, 01:12 AM
    I found some information on the following site that might be helpful to you. I hope that it is. VPN Protocols
    chuckhole's Avatar
    chuckhole Posts: 850, Reputation: 45
    Senior Member
    		  
    #3

    May 27, 2008, 10:36 AM
    What VPN are you using? Microsoft? Cisco? Are you using IPSec or PPtP? On some VPN clients such as Cisco, you can specify the high port. The VPN tunnel starts with port 500 and then uses IPSec over TCP (default) 1000 or you can use IPSec over UDP using NAT.
    ericmmonda's Avatar
    ericmmonda Posts: 2, Reputation: 1
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    #4

    Jun 4, 2008, 10:28 AM
    If you are using Windows VPN (PPTP) the port number is 1723. This VPN protocol also requires GRE (43) to be opened.
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