I cannot connect to resources in a Private Network via SSH bastion

Problem

I am unable to connect to a resource located inside a Private Network via the SSH bastion of a Public Gateway.

Cause

Underscores (_) or successive dashes (---) in the names of resources inside a Private Network are converted to a single dash (-) for technical reasons.

Solution

Replace underscores and successive dashes in the name of the resource you are trying to connect to by single dashes, as shown in the examples below.

Connecting to an Instance in a Private Network

# Failing SSH command
ssh -J bastion@192.168.0.1:61000 root@my-instance.my_private_network.internal

# Working SSH command
ssh -J bastion@192.168.0.1:61000 root@my-instance.my-private-network.internal

Connecting to a Kapsule cluster node in a Private Network

# Failing SSH command
ssh -J bastion@192.168.0.1:61000 root@my-k8s-cluster--prod--abc123

# Working SSH command
ssh -J bastion@192.168.0.1:61000 root@my-k8s-cluster-prod-abc123