Cisco VPN :: Initiate VPN From Router On Local LAN Behind ASA 5540?

We currently have an ASA with site to site VPN and anyconnect VPN being utilized. We received a third party  cisco router which will  be used to initiate their own site to site VPN from inside our local LAN to their LAN through our ASA.
 
1. Would NAT Traversal be required on our ASA? 5540(config)#crypto isakmp nat-traversal

2. Would the ports listed below interfere with ports for site to site VPN and anyconnect VPN?

SSH
- allow access from xxxxx on TCP Port 22
ICMP
- allow access from xxxxx - protocol 1
ISAKMP
- allow access to xxxxx on UDP Port 500, also add UDP 4500 for NAT-T

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