TelnetProxy is a module built for parsing TELNET protocol commands and the negotiation process. It reads and parses COMMANDs on the client side, and sends them to the server if the local security policy permits. Arriving RESPONSEs are parsed as well and sent to the client if the local security policy permits. It is possible to manipulate options by using TELNET_OPT_POLICY. It is also possible to accept or deny certain options and suboptions.

The Telnet shell itself cannot be controlled, thus the commands issued by the users cannot be monitored or modified.