Public
- Public
- Network
- Groups
- Popular
- People

Conversation

Notices

nixCraft 🐧 (nixcraft@mastodon.social)'s status on Monday, 12-Feb-2024 18:24:00 JST nixCraft 🐧

How SSH port became the default TCP/22
https://www.ssh.com/academy/ssh/port#the-story-of-getting-ssh-port-22
In conversation about a year ago from mastodon.social permalink
Attachments
1. To: Internet Assigned Numbers Authority Subject: request for port number Organization: Helsinki University of Technology, Finland Dear Sir, I have written a program to securely log from one machine into another over an insecure network. It provides major improvements in security and functionality over existing telnet and rlogin protocols and implementations. In particular, it prevents IP, DNS and outing spoofing. My plan is to distribute the software freely on the Internet and to get it into as wide use as possible. I would like to get a registered privileged port number for the software. The number should preferably be in the range 1-255 so that it can be used in the WKS field in name servers. I'll enclose the draft RFC for the protocol below. The software has been in local use for several months, and is ready for publication except for the port number. If the port number assignment can be arranged in time, I'd like to publish the software already this week. I am currently using port number 22 in the beta test. It would be great if this number could be used (it is currently shown as Unassigned in the lists). The service name for the software is "ssh" (for Secure Shell). Yours sincerely, Tatu Ylonen The next day, I had an e-mail from Joyce waiting in my mailbox: From: jkrey@ISI.EDU Re: request for port number Cc: iana@ISI.EDU Tatu, We have assigned port number 22 to ssh, with you as the point of contact. Joyce There we were! SSH port was 22!!!
  https://files.mastodon.social/media_attachments/files/111/917/776/580/231/248/original/6c455d6f4b29a33a.png
2. The story of the SSH port is 22.
  
  The SSH port is 22. This is the story of how it got that port number. And practical configuration instructions.
- ObjectVoice / Matthew Walker (objectvoice@mastodon.social)'s status on Monday, 12-Feb-2024 20:30:23 JST ObjectVoice / Matthew Walker
  in reply to
  
  @nixCraft ahh. Yes. That’s right. We used to connect to other machines using Telnet. EHLO.
  
  In conversation about a year ago permalink
- Expertenkommision Cyberunfall (expertenkommision_cyberunfall@mastodon.social)'s status on Tuesday, 13-Feb-2024 01:22:12 JST Expertenkommision Cyberunfall
  in reply to
  
  @nixCraft
  It always felt like and is now proven: Beta Test.
  
  In conversation about a year ago permalink

Public

Conversation

Notices

Feeds