ENDIAN Firewall - Endian <-> Juniper IPSec VPN tunnel

Hi all

First post here. Before I get into the nitty-gritty, I do not consider myself to be an Endian guru by any means, so please bare with me.

We're trying to configure an Endian <-> IPSec Net-to-Net tunnel, but so far, it's just not working. From Endian (the UI I have access to), it does end up showing as "Connected" eventually, but looking at /var/log/endian/ipsec/ipsec.log though, it does not appear too happy at all.

Before I get to the technical bits and pieces, has anyone ever managed to successfully do an IPSec Endian <-> Juniper Net-to-Net tunnel? If so, can you please advise?

The technical details:

Endian version: 3.0.devel running on 2.6.32 kernel
Authentication type: PSK
IKE encryption: 3DES
IKE group type: DH group 2
IKE version: 1
IKE integrity: SHA1
IKE lifetime: 24 hours
ESP encryption: 3DES
ESP group type: DH group 2
ESP integrity: SHA1
ESP lifetime: 24 hours

As mentioned before, Endian shows this as "connected" eventually, but the connectivity just isn't there. Of the more ominous looking log entries are:

peer not responding, trying again (153/0)
received retransmit of request with ID 2354
357634, but no response to retransmit
received unknown vendor ID:
[IKE] no matching CHILD_SA config found

I've tried all combos of configs I could think of, but I've exhausted my options at this point. I'm thinking that there is either something in the Juniper side that's not quite right (which I cannot confirm as I do not have access to it), or the Endian version we have needs updating, or Endian <-> Juniper IPSec Net-to-Net tunneling is simply not possible.

If there's anyone out there that can perhaps offer any advice, I'd appreciate it.

Thanks in advance.