linux-ipsec: Interoperability with Raptor 5 (Success!)

I don't know if this is useful information for anyone, but I have successfully established a VPN between RedHat 5.1 (kernel 2.0.34) running FreeS/WAN 0.91 and NT4 running Raptor 5. However, Pluto does not appear compatible with the Raptor IKE implementation. Unfortunately, I am not in control of the Raptor end of the tunnel to be able to continue testing Pluto.

With full debugging turned on, I'm getting the following messages, but it isn't preventing anything from working. I thought someone might find this information useful. (Note: The ip addresses have been replaced for security.):

Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: packet from xxx.xxx.
xxx.xxx received with spi=0x200 seq=3910 (iv)=0x450f0000baf0ffff iplen=88 esplen=5
6
Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: padlen=2, contents
: 1:100
Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: warning, decrypted
 packet from xxx.xxx.xxx.xxx has bad padding Jan 6 16:12:58 willy kernel:
Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: ...may be bad decr
yption -- not dropped
Jan 6 16:12:58 willy kernel: 2:131
Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: warning, decrypted
 packet from xxx.xxx.xxx.xxx has bad padding Jan 6 16:12:58 willy kernel:
Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: ...may be bad decr
yption -- not dropped
Jan 6 16:12:58 willy kernel:
Jan 6 16:12:58 willy kernel: klips_debug:esp3desmd596_input: packet decrypted f
rom 209.4.208.2: proto = 4, padding = 2
Jan 6 16:12:58 willy kernel: klips_debug:esp_rcv: new Jan 6 16:12:58 willy kernel: klips_debug: IP:hlen:20 ver:4 proto:4 saddr:xxx.xxx.
xxx.xxx daddr:yyy.yyy.yyy.yyy tlen:56 Received on Wed Jan 6 17:05:49 1999