When I try to SSH to the devbox (10.10.20.20) in the OpenNXOS with N9Kv sandbox, the connections hangs. See the SSH -vvv output below. I can ping the 10.10.20.20 IP address as well as reach the management interfaces on the 4 NX-OSv instances so the VPN is working. Completing the SSH connection to that host is not working.
$ ssh -vvv root@10.10.20.20
OpenSSH_7.6p1, LibreSSL 2.6.2
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 10.10.20.20 port 22.
debug1: Connection established.
debug1: identity file /Users/millerte/.ssh/id_rsa type 0
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/millerte/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
debug3: fd 5 is O_NONBLOCK
debug1: Authenticating to 10.10.20.20:22 as 'root'
debug3: hostkeys_foreach: reading file "/Users/millerte/.ssh/known_hosts"
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
