Twin WAN Series – User Guide | v1
Options - Settings
NetBIOS Broadcast
This option is used to forward NetBIOS packets across the Internet from the remote side
to local side and vice versa. When enabled, the remote side computer can be reached by a
host name.
Auto Triggered
When enabled, the Twin WAN Gateway will attempt to connect to the remote gateway
without any user input.
Anti Replay
The Anti Replay mechanism works by keeping track of the sequence numbers in packets
as they arrive. This ensures the IP level security is in order.
Passive (Responder) Mode
When enabled, the logical tunnel state will remain idle until an attempt is made to
connect to the remote side. This setting will override the Auto Triggered option.
Check ESP Pad
When enabled, the Twin WAN VPN gateway will check the ESP (Encapsulating Security
Payload) padding of each packet. ESP is a key protocol in the IPsec (Internet Security)
architecture, which is designed to provide a mix of security services in IPv4 and IPv6.
(Refer to the RFC 2406 documentation for more information)
Allow full ECN
When enabled, this option will allow full Explicit Congestion Notification (ECN). ECN
is a standard proposed by the IETF that minimizes congestion on a network and
preventing the gateway from dropping data packets.
Copy DF Flag
When an IP packet is encapsulated as payload inside another IP packet, some of the outer
header fields can be newly written and others are determined by the inner header. Among
these fields is the IP DF (Do not fragment) flag. When the inner packet DF flag is clear,
the outer packet may copy it or set it. However, when the inner DF flag is set, the outer
header
MUST
copy it.
Set DF Flag
If the DF (Do not Fragment) flag is set, it means the fragmentation of this packet at the IP
level is not permitted.
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