Client VPN not connecting

[StarZen]

I am having an issue with connecting to a client VPN. 

the machine is win 10 but i also tried to connect from a chromebook. Both can connect to other client vpns i have set up just fine

the client vpn is on a connection to comcast. not using comcasts hardware but a motorola SB6183.

meraki connects directly to motorola modem

as far as i can tell no VPN connection logs in the meraki. the VPN connection just times out

any ideas what to look for?

thanks

Mike

[ww]

Is comcast running nat?

If so, do the forward the vpn to to the meraki mx ip?

https://documentation.meraki.com/MX/Client_VPN/Guided_Client_VPN_Troubleshooting#Upstream_NAT.2Ffire...

[StarZen]

no NAT involved. motorola cable modem (no router) directly connected to cable internet. MX connected directly to cable modem

[StarZen]

i should probably mention the site i am trying to get the client VPN up and running is also a spoke to a site to site VPN

[Brash]

I don't know if it's applicable to Comcast, but check your ISP doesn't do Carrier Grade NAT (CG-NAT). That will prevent you from initiating inbound connections.

If you're manual port forwarding for your site-to-site, double check there's no port overlaps.
Site-to-site and Client VPN Port Overlap with Manual port Forwarding rules - Cisco Meraki