Manual:IP/SSH

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Revision as of 12:04, 15 June 2015 by Janisk (talk | contribs) (Settings: strong-crypto)
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Applies to RouterOS: v5

Summary

This menu controls if ssh server behaviour regarding port forward and authentication methods.

Settings

Property Desciption
forwarding-enabled (no|yes default:no) controls ssh port forwarding
always-allow-password-login (no|yes default:no) controls ssh authentication methods, if set to yes, does not remove form allowed methods password_login
strong-crypto (no|yes default:no) Introduces following changes in ssh configuration:
  • prefer 256 and 192 bit encryption instead of 128 bits
  • disable null encryption
  • prefer sha256 for hashing instead of sha1
  • disable md5
  • use 2048bit prime for Diffie Hellman exchange instead of 1024bit

Example

To use this feature from Linux host using OpenSSH client this command can be used:

 ssh reamoteuser@remotehost -L port:remotehost:remoteport

where:

  • remoteuser - user of router
  • remotehost - router address (if host name is used in -L settings, router should be able to resolve this name)
  • port - local port that your host will listen on
  • remoteport - port on the router

If user requires telnet to router, but you do not want to allow it to be plain text, Following can be done:

ssh admin@192.168.88.1 -L 3000:192.168.88.1:23

now when user uses telnet localhost 3000" it will log in the router using telnet over encrypted tcp connection.

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Note: we fully support SFTP v3 as described in draft-ietf-secsh-filexfer-02.txt other versions can cause problems