34D-Link DWR-555 User Manual
Section 3 - Configuration
Remote SPI will be included in the 
inbound  packet  transmitted  from 
WAN  side  of  remote  gateway.  It 
will be used to de-hash the coming 
packet and check its integrity. The 
value of remote SPI should be set 
in hex format.
Two algorithms can be selected: 3DES 
and DES. When the encapsulation 
protocol is set to AH, the encryption 
algorithm is unnecessary.
The  encryption  key  is  used  by  the 
encryption algorithm. Its length is 8 
bytes if encryption algorithm is DES 
or 24 bytes if 3DES. The key value 
should be set in hex format.
Two  algorithms  can  be  selected: 
SHA1 and MD5. But “None” also can 
be selected here for non-hashing operation.
This authentication key is used by the authentication algorithm. Its length is 16 bytes if authentication algorithm 
is MD5 or 20 bytes if SHA1. Its length will be 0 if no authentication algorithm is chosen. The key value should 
be set in hex format.
Remote SPI:
Encryption Algorithm:
 
Encryption Key:
Authentication Algorithm:
 
 
Authentication Key: