Does the device support VPDN

The device supports DNS proxy. The DNS proxy forwards DNS request and response packets between a DNS client and DNS server. The DNS client on a LAN considers the DNS proxy as the DNS server and sends DNS request packets to the DNS proxy. The DNS proxy forwards DNS request packets to the DNS server, and sends DNS response packets from the DNS server to the DNS client, to implement domain name resolution. When the DNS server's IP address changes, you only need to change the DNS proxy configuration without changing the configuration of each DNS client. This simplifies network management.

The device must connect to video phones to support voice and video services. The device supports only the following IP phones: -MIEEGXP14001 -MIEEGXP14501 -MIEEGXP21001 -MIEEGXP21101 -MIEEGXP21201

VPDN uses the following tunneling protocols: - Point-to-Point Tunneling Protocol (PPTP) - Layer 2 Forwarding (L2F) - Layer 2 Tunneling Protocol (L2TP) The AR supports L2TP, but does not support PPTP or L2F. However, it can forward PPTP and L2F packets. L2TP has advantages of both PPTP and L2F and is widely used. It is used when a single or a few terminals remotely connect to an intranet through a public network.

Fat APs do not support WLAN roaming. AC+Fit AP networking support WLAN roaming. V200R003 and earlier versions support only intra-AC roaming, while V200R005 and later versions support both intra-AC and inter-AC roaming. Depending on whether a STA roams within the same subnet, WLAN roaming is categorized as Layer 2 roaming (on the same subnet) and Layer 3 roaming (on different subnets). Layer 2 roaming is classified into fast roaming and non-fast roaming according to security policies used by STAs. Only when the security policy is WPA2-802.1x and STAs support fast roaming technology, fast roaming can be achieved.