Enable Telnet access on MacOS High Sierra

Lots of things changed under the hood in MacOS high sierra. One of those was to enable a sandbox like environment and to remove insecure communication protocols. This breaks things like console communication to the network modeling and virtualization platform Eve-NG . It’s fairly trivial to re-enable it, however. This can be accomplished by doing the following steps.

Install Homebrew . Open your favorite terminal application (I like to use iTerm2 (also installable via homebrew), but Terminal works fine.)

1. Reboot your Mac and hold the CMD + R keys 
2. When presented with the recovery options, click Utilities at the top and choose Terminal 
3. Type; csrutil disable 
4. Reboot as normal 
6. terminal and type; 
brew install telnet 
sudo ln -s /usr/local/bin/telnet /usr/bin/telnet 
7. Again, Reboot your Mac and hold the CMD + R keys 
8. When presented with the recovery options, click Utilities at the top and choose Terminal 
9. Type; csrutil enable 
10. Reboot as normal

You’re done. You can have telnet for your internal communication to Eve-NG consoles. Don’t use it to talk to production network gear, because it’s not 1998.

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Enable Telnet access on MacOS High Sierra

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