I have VPN working for users that connect to my internal network via the internet.I would also like then to be able to use their softphone to make calls to internal extension via Voip.
They are able to login to the VOIP server that is internal and make a call via VPN.When the phone rings each side cannot hear each other. Can I please have some help on what I might be missing out on please please.
More than likely the issue is related to an ACL or routing since this is a remote access problem. Verify that no ACLs for security are blocking UDP 16384 to 32767 for the RTP voice stream. Also verify that the VPN subnet range can route to the voice vlans since your softphone will be sending a directly to the IP Phone it's UDP stream and vice versa. Lastly make sure the Voice IP range and ports are in your VPN tunnel crypto ACLs.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...