Is it possible to connect to Linux VPS via VPN running on another Linux VPS at all? I have 2 Debian VPS boxes. The first one runs openvpn only. The second one is production. I entered the IP address of the one that runs openvpn into the second one iptables' rules, allowing it to connect -A INPUT -s 1.1.1.1/32 -p tcp -m tcp --dport 22 -j ACCEPT. However, it always times out and won't connect. For testing purposes I flushed all the iptable rules but it still won't connect. The box that runs openvpn is working fine. The second production box is also working fine. Now how do I connect my running openvpn box to my production box via SSH? I can also connect from my machine at home to both boxes OK. I thought that all that my production box needed was to allow the IP address through iptables but... it appears to be not the case. Would highly appreciate any pointers / suggestions / help at all. Many thanks in advance.
# Generated by iptables-save v1.8.2 on Mon Jul 19 11:23:12 2021
*nat
:PREROUTING ACCEPT [109935:17664249]
:INPUT ACCEPT [3374:238825]
:OUTPUT ACCEPT [256:14081]
:POSTROUTING ACCEPT [256:14081]
COMMIT
# Completed on Mon Jul 19 11:23:12 2021
# Generated by iptables-save v1.8.2 on Mon Jul 19 11:23:12 2021
*mangle
:OUTPUT ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:MARK - [0:0]
:FORWARD ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
COMMIT
# Completed on Mon Jul 19 11:23:12 2021
# Generated by iptables-save v1.8.2 on Mon Jul 19 11:23:12 2021
*filter
:INPUT ACCEPT [515175:66884905]
:FORWARD ACCEPT [1015130:1311622928]
:OUTPUT ACCEPT [1014840:1315160290]
-A INPUT -s 1.1.1.1/32 -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j DROP
COMMIT
# Completed on Mon Jul 19 11:23:12 2021
