Yes, this would be possible as long as the needed TCP ports were open on the firewall. Which ports to open would be determined by how you intend to use your TS8, but some common ones might be 23 (telnet), 80 (http), 2000+port numbers (ascii telnet tunnel directly to serial port), 2100+port numbers (binary telnet tunnel directly to serial port), 2500+port number (ssh tunnel directly to serial port), 771 (realport), and 1027 (encrypted realport).