I've gone ahead and added a PROXY flag to the MTTS standard, which allows proxy clients to identify themselves as proxies. I also added a Proxies subsection to the MTTS standard that details how to exchange IP address information over the NEW-ENVIRON telnet option.
The reason I picked NEW-ENVIRON is because the implementation burden is small compared to fully supporting GMCP or MSDP, and that MSDP was never intended to be used for this purpose.
The reason I picked NEW-ENVIRON is because the implementation burden is small compared to fully supporting GMCP or MSDP, and that MSDP was never intended to be used for this purpose.
http://tintin.sourceforge.net/mtts