If your question is about telnet to port 443, we cannot disable it. The reason is for Telnet and SSL connection the first packet is a TCP SYN on port 443 and the firewall will respond with SYN-ACK as the service (VPN) is enabled. From the TCP handshake packets the firewall cannot determine if it is telnet or VPN negotiation. It is the case with telnet to any application service.
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