Rosewill RNX-N4 User Manual
Page 62
Wireless Adapter
RNX-N4 User Manual
62
When a LAN application that uses a protocol other than UDP, TCP, or ICMP initiates a
session to the Internet, the router's NAT can track such a session, even though it does
not recognize the protocol. This feature is useful because it enables certain
applications (most importantly a single VPN connection to a remote host) without the
need for an ALG.
• Note: This feature does not apply to the DMZ host (if one is enabled). The DMZ host
always handles these kinds of sessions.
• Enabling this option (the default setting) enables single VPN connections to a remote
host. (But, for multiple VPN connections, the appropriate VPN ALG must be used.)
Disabling this option, however, only disables VPN if the appropriate VPN ALG is also
disabled.
• Application Layer Gateway (ALG) Configuration: Place a check in appropriate feature
boxes to enable them. . Some protocols and applications require special handling of
the IP payload to make them work with network address translation (NAT). Each ALG
provides special handling for a specific protocol or application. A number of ALGs for
common applications are enabled by default.
1.
PPTP: Allows multiple machines on the LAN to connect to their corporate
networks using PPTP protocol. When the PPTP ALG is enabled, LAN computers
can establish PPTP VPN connections either with the same or with different VPN
servers. When the PPTP ALG is disabled, the router allows VPN operation in a
restricted way -- LAN computers are typically able to establish VPN tunnels to
different VPN Internet servers but not to the same server. The advantage of
disabling the PPTP ALG is to increase VPN performance. Enabling the PPTP
ALG also allows incoming VPN connections to a LAN side VPN server (refer to
Advanced
→ Virtual Server).
2.
IPSec: (VPN) Allows multiple VPN clients to connect to their corporate networks
using IPSec. Some VPN clients support traversal of IPSec through NAT. This
option may interfere with the operation of such VPN clients. If you are having
trouble connecting with your corporate network, try disabling this option. Check
with the system adminstrator of your corporate network whether your VPN client
supports NAT traversal.
3.
RTSP: Allows applications that use Real Time Streaming Protocol to receive
streaming media from the internet. QuickTime and Real Player are some of the
common applications using this protocol.
4.
Windows/MSN Messenger: Supports use on LAN computers of Microsoft