There might not be a gateway configured, and as you have upped the config you should know :-)
So its eitherthe one you configured or the old one (ok which could also be none).
If its the old one it will not work if it would be outside the subnet range.
SSH v1 is not supported, so you want to use SSH v2.
Thats might help you as well:
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: Server accepts key: pkalg ssh-dss blen 434
I would do NAT on the interface towards the VCS that could also help and next
time consider having remote access to the serial port and be careful what to paste into the box