Extreme Networks Altitude 4700 Series Product Reference Manual page 231

To configure manual key settings for the access point:
1 Select Network Configuration > WAN > VPN from the access point menu tree.
2 Refer to the VPN Tunnel Config field, select the Manual Key Exchange radio button and click the
Manual Key Settings button.
3 Configure the Manual Key Settings screen to modify the following:
NOTE
When entering Inbound or Outbound encryption or authentication keys, an error message could display
stating the keys provided are "weak". Some WEP attack tools invoke a dictionary to hack WEP keys based on
commonly used words. To avoid entering a weak key, try to not to produce a WEP key using commonly used
terms and attempt to mix alphabetic and numerical key attributes when possible.
AH Authentication
Altitude 4700 Series Access Point Product Reference Guide
AH provides data authentication and anti-replay services
for the VPN tunnel. Select the required authentication
method from the drop-down menu:
• None—Disables AH authentication. The rest of the
fields are not active.
• MD5—Enables the Message Digest 5 algorithm
requiring 128-bit (32-character hexadecimal) keys.
• SHA1—Enables Secure Hash Algorithm 1, requiring
160-bit (40-character hexadecimal) keys.
231