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by chasil6 hours ago |
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upvoteby dspillett6 hours ago|
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It is surprising how many times I see this content (this version might be marked “Published: Jun 19, 2026” but I've definitely seen those exact diagrams before, starting at least a few years ago, and the same content around them in many tutorials before that) without it being updated to mention jump-hosts.

Support was added to OpenSSH about a decade ago? Even on a low moving Linux distro like Debian/LTS everyone should have support by now.

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upvoteby 5 hours ago|
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upvoteby saltcured1 hours ago|
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For me, this is always used via ProxyJump rules in my ~/.ssh/config

It is also nice that it works recursively, so I can logically structure my rules so that the one for my regular targets say to use bastion1, then the rule for bastion1 says to go via bastion 2, etc.

I find this easier to reason about and maintain rather than juggling a bunch of these multi-step rules.

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upvoteby m348e9122 hours ago|
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>ssh -J user1@bastion1,user2@bastion2 targetuser@targethost

Are you using SSH key auth or password authenticating three times when you do this?

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upvoteby chasil1 hours ago|
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If you don't have an agent running with an accessible key, then you will get three password prompts, with suggestions for any default keys.

The final target is a pre-elliptic curve OpenSSH server, so legacy is enabled. I could probably have removed that for clarity.

  C:\Users\me\>ssh -J me@bhost1,me@bhost2 -o KexAlgorithms=diffie-hellman-group14-sha1 -o HostKeyAlgorithms=ssh-rsa -o MACs=hmac-sha1 oracle@target
  Enter passphrase for key 'C:\Users\me/.ssh/id_ed25519':
  me@host1's password:
  Enter passphrase for key 'C:\Users\me/.ssh/id_ed25519':
  me@host2's password:
  oracle@target's password:
  Last login: Wed Jun 24 13:29:55 2026 from bhost2
That client is Microsoft's port of OpenSSH.
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upvoteby saltcured1 hours ago|
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I always use keys in my SSH agent.

Because the jump mechanism works via use of TCP forwarding, each host authn step is talking "directly" to your client. Importantly, this means it still works without requiring "agent forwarding" for the connection you are making.

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