wiki:xo_serial_access

Version 29 (modified by Jamie McClelland, 8 years ago) (diff)

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In XO/Bandcon Serial Console access

Note: if you are trying to connect to a server in our Telehouse facility, see our Telehouse serial access page; for Sunset Park see Sunset Park serial acess page.

Coming soon (sometime after 2012-06-09)! roy.mayfirst.org will replace paley as our console server. This transition is in progress. All serial connections are still running through paley.

Physical Setup

Console server: paley.mayfirst.org

  • Port 1: ochs.mayfirst.org (remote power)
  • Port 2: axiom (CritPath)
  • Port 3: luisa.mayfirst.org
  • Port 4: malaka.mayfirst.org
  • Port 5: ottorene.mayfirst.org
  • Port 6: ramona.mayfirst.org
  • Port 7: pietri.mayfirst.org
  • Port 8: nene
  • Port 9: finch
  • Port 10: clr
  • Port 11: pianeta (asm)
  • Port 12: shaw (tenant.net)
  • Port 13: zunzuncito (backup switch not in use)
  • Port 15: bufflehead (Riseup)
  • Port 16: kato (in use switch)
  • Port 22: franz (saharareporters)
  • Port 48: odetta.mayfirst.org (remote power)

Connecting to your serial console paley as sysadmin

You can also connect directly via paley with:

ssh sysadmin@paley.mayfirst.org
connect direct deviceport <servername>

To exit from a direction connect, type ESC-A (that's hit and release escape and then shift-a).

Connecting to roy via serial console

In addition - we have a serial line running from luisa's /dev/ttyUSB0 that goes to roy's built-in serial port 1, so that roy's console itself is remotely accessible, and logged. You can connect to roy's console with:

ssh -t roy-console@luisa.mayfirst.org cereal attach roy

sysrq

To get the sysrq menu (for raising skinny elephants), type ESC-B h (thats hit and release escape and then shift-B and then h to get the sysrq menu)

Creating a new serial line/user

These need to be improved - not sure how to do this via the command line - so far I'm doing this via the web interface at https://paley.mayfirst.org.

  1. Configure the device by going to Devices -> Device Port. Then select the port you want to configure and click configure
    • Provide a name (after the server name)
    • Check the box that says ssh in
    • Change Baud to 115200
  2. Configure the user by doing to User Authentication -> Local/Remote Users and click Add/Edit User
    • Enter a login (servername-console)
    • Create a password
    • Change the listen, data, and clear port settings to just the number of the port they should have access to
    • Enable web access
  3. Configure ssh key access
    • Place the user's public key on a server accessible by password-based scp
    • Edit the username portion of the ssh key line (that last part - separated by a space from the key). Change the username to be the username they will be logging in as on the console server. The portion after the @ sign can be anything (but must be included).
    • Via the web interface, click User Authentication -> SSH users
    • Leave host blank. Enter the target username in the user field
    • Fill out all fields in the Host and Login for import form.
    • Click apply