You might want to use an overlay networking solution like https://wormhole.network https://wormhole.network Edit to add why: You'll have full reachability betw

You might want to use an overlay networking solution like https://wormhole.network https://wormhole.network Edit to add why: You'll have full reachability between pgbackup and your customer's servers without opening ports inbound on either side. Traffic is also encrypted :-) Disclaimer: I am part of Wormhole Network.