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IP PBXs USER MANUAL
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Ensure VLAN IPs for VLAN1 and VLAN2 of WAN and LAN interfaces are in several different network segments.
12.3.5 VPN
Path:
System -> Network Settings -> VPN
VPN (Virtual Private Network) is mainly used for setting up long-distance and/or secured network connections. When used on the IPPBX
system, all phone calls made and received are encrypted so it secures your remote offices/extensions' phone services. Built-in VPN Server
on the IPPBX system is an easy way to set up a secured connection between other IPPBXs or IP phones. You don't need to build a
dedicated VPN server or buy a VPN router. This is also a workaround to avoid firewall issues when configuring remote VoIP client such as
SIP protocol which is notoriously difficult to pass through a firewall due to its random port numbers to establish connection.
IPPBX supports 4 VPN varieties, PPTP VPN, OpenVPN, IPsec and L2TP. On a IPPBX system you can only configure one VPN variety to work
in one role. In other words, on a IPPBX system you cannot configure OpenVPN , PPTP VPN, IPsec and L2TP to work at the same time or to
configure VPN server and client at the same time.
OpenVPN Server
OpenVPN is an open-source software application that implements virtual private network (VPN) techniques for creating secure