Manage Ubiquiti Dream Machine Site To Site VPN Tunnels via SSH

1. Login to the UDM via SSH
   Default username: root
   ssh root@[UDM-IP]

2. Change directory to ipsec.d/tunnels
   cd /run/strongswan/ipsec.d/tunnels

3. List directories and edit the .config file
   ls
cat [ID].ipsec.s2s.config (To view the config)
   nano [ID].ipsec.s2s.config to edit the file in Nano
   vim [ID].ipsec.s2s.config to edit the file in vim

For troubleshooting created VPNs, refer to View UDM VPN Logs