Another minor thing you might run into is that servers don't reliably send DONT vs WONT and DO vs WILL when negotiating. A server (or client) should send `IAC

Another minor thing you might run into is that servers don't reliably send DONT vs WONT and DO vs WILL when negotiating. A server (or client) should send `IAC WILL <option>` to announce that it has a capability, and the other party will confirm/reject with DO or DONT. But some servers will send `IAC DO <option>` even though they are announcing a capability (like server-to-client compression). Telnet is fun and I like how simple it is. Kinda sad it's basically dead except for what feels like servers that nobody remembered to unplug.