In a setup with a main site and a remote site, we have a current, non-TP Link, site-to-site IPsec VPN connection. I have Webmin setup and use its System and Server Status' Remote Ping to let me know if a computer is running at the remote site. That worked.

  Now, I replaced the main sites firewall with the TL-R600VPN and the IPsec VPN connection appears to be up and running. I can manually ping computers at the remote site from the main site with expected results (no loss, average times) and can manually ping computers at the main site from the remote site - Even the main site's Webmin server. But Webmin's Remote Ping (behind the TL-R600VPN) still thinks the remote site is down. It also cannot detect sites outside of the VPN (like DNS server).

  I assumed if I could manual ping a client, Webmin would see the same.

  Log file does not give me a clue. What am I doing wrong? What can I check? Thanks.