EnGenius Technologies ESR-9710 User Manual download pdf (Page 60)

ESR-9710 Wireless N Gigabit Router Version 1.0

 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.

o 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).

o 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.

o 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.

o Windows/MSN Messenger: Supports use on LAN computers of Microsoft

Windows Messenger (the Internet messaging client that ships with Microsoft

Windows) and MSN Messenger. The SIP ALG must also be enabled when

the Windows Messenger ALG is enabled.

o FTP: Allows FTP clients and servers to transfer data across NAT.

o H.323 (Netmeeting): Allows H.323 (specifically Microsoft Netmeeting) clients

to communicate across NAT server.

o SIP: Allows devices and applications using VoIP (Voice over IP) to

communicate across NAT. Some VoIP applications and devices have the

ability to discover NAT devices and work around them. This ALG may

interfere with the operation of such devices. If you are having trouble making

VoIP calls, try turning this ALG off.

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EnGenius Technologies ESR-9710 User Manual Page 60