Hmm, every IPSec-compliant-client should work. ASL is using FreeSWAN. So every product that is compatible with FreeSWAN should work with ASL, too.
I know that - Cisco Pix - Bintec - Multitec - Checkpoint - Symantec - Sonic
is working. But I do not know if every version of these firewalls are working. Maybe only a several version is working. Some of them are not compliant with PFS. So disable PFS if you have trouble.
Hmm, every IPSec-compliant-client should work. ASL is using FreeSWAN. So every product that is compatible with FreeSWAN should work with ASL, too.
I know that - Cisco Pix - Bintec - Multitec - Checkpoint - Symantec - Sonic
is working. But I do not know if every version of these firewalls are working. Maybe only a several version is working. Some of them are not compliant with PFS. So disable PFS if you have trouble.