User's Manual

Table Of Contents
USR-G809 User Manual Technical Support:
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Jinan USR IOT Technology Limited www.pusr.com
40
Peer Subnet
IP/Mask:
255.255.255.0: IP/24
255.255.255.255: IP/32
192.168.55.0/24
Local GRE Interface IP
Address
Local GRE tunnel IP address
10.10.10.2
TTL
Set the TTL parameters(1~255)
255
MTU
Set the MTU(600~1450)
1450
6. Firewall
6.1. General Settings
Descriptions:
1. Input: Data packets access to the routers IP.
2. Output: Data packets sent by the routers IP.
3. Forward: Data forwarding between the interfaces, not go through the router.
4. Masquerading: WAN and 4G interface. The source IP address will be disguised before accessing the
external network.
5. MSS clamping: Limit the MSS packets, generally is 1460.
6.2. NAT
6.2.1.Masquerading
Masquerading will disguise the source IP address of the data packets to the WAN IP address of the router.