DNS 3

The address of an alternate DNS server to use

 

in case DNS Servers #1 and #2 are down or

 

very slow

Clone MAC

(Usually optional) Enter the MAC address of a

Address

device in the LAN network if you want to use

 

that address for Internet access instead of the

 

AP+4’s MAC address.

Enable uPNP

Select this check box to enable Universal Plug

 

and Play, which lets devices connect

 

automatically to one another over the LAN,

Enable Ping

Select this check box to allow someone to ping

Access on WAN

the AP+4 over the Internet . This is useful for

 

troubleshooting – it can allow a technician to

 

remotely ping the AP+4 to see if it is working.

 

In normal use, this option should be disabled

 

for security reasons.

Enable Web

Select this check box to allow someone to

Server Access on

remotely access the AP+4’s built-in HTTP

WAN

server. Web server access is useful for

 

troubleshooting – it can allow a technician to

 

remotely check the AP+4 configuration

 

settings. In normal use, this option should be

 

disabled for security reasons.

Enable IPsec

(PPTP/VPN only) Select this check box to let

passthrough on

network devices communicate via a Virtual

VPN connection

Private Network (VPN) using Internet Protocol

 

security (IPsec), in which sending and

 

receiving devices share a public key for

 

encryption and decryption. The AP+4 simply

 

passes the encrypted packets back and forth

 

between the VPN clients and the ISP’s VPN

 

server.

Enable PPTP

(PPTP/VPN only) Select this check box to

passthrough on

protect VPN communication via Point-to-Point

VPN connection

Tunneling Protocol. The AP+4 passes the

 

encrypted packets back and forth between the

 

VPN clients and the ISP’s VPN server.

Enable L2TP

(PPTP/VPN only) Select this check box to

passthrough on

protect VPN communication via Layer 2

VPN connection

Tunneling Protocol, an enhancement of PPTP

 

and L2F protocols. The AP+4 passes the

 

encrypted packets back and forth between the

 

VPN clients and the ISP’s VPN server.

Set TTL (Time to

Enter the number of hops a packet can make

Live timer) Value

before it is discarded.

Chapter 5. TCP/IP Settings

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