Pre-shared Keys Changing

Hello MrOven ,

Thank you for reaching out to the community, if you make any changes on the VPN configurations then the users will need to re-download the config file once again in order to connect it successfully !!

Thanks for answering, the connection is a site-to-site, I already have 2 configured with the same preshared key and I need to add others with a different preshared key. My question is: will i lost or will the other site-to-site connection get modified, after applying the nw site-to-site connection?

MrOven No, for Site-to-Site VPN, if you update the PSK then ensure the remote peer appliance has the same PSK. 

And it does not effect the another running IPsec tunnel until that IPsec's tunnel remote PSK has been changed !! 

Ipsec works in phase 1 and phase 2. 

Phase 1: PSK

Phase 2: Own key.

This means, if you have an green tunnel, it will use Phase2. You can change the key. But if you disconnect and reconnect, the PSK is needed. If this is changed, the tunnel will stay down.

SFOS will use the same PSK for all Wildcard Tunnel (Remote tunnel: *) 

Thanks to both for the help :)