Changes between Version 4 and Version 5 of User Guide/Remote Access/SSH

Timestamp:

Oct 18, 2019, 1:00:42 AM (6 years ago)

Author:

msherman

Comment:

—

User Guide/Remote Access/SSH

@@ -279 +279 @@
   
 
-
-=== If you deleted the "@internal1" key from your profile ===
+=== Common SSH issues ===
+==== If you deleted the "@internal1" key from your profile ====
 
 As long as you have at least one public key configured in your profile, use your SSH client to connect to {{{gw.orbit-lab.org}}} and run the following commands there. You do not need to make a reservation in the scheduler for this.
@@ -299 +299 @@
 
 The internal key should now be restored.
+
+
+==== Common ssh options for nodes ====
+
+We'd like to do a few things for convenience:
+
+1. log into nodes as root by default
+1. allow forwarding of X11 applications
+1. Suppress annoying host key warnings
+
+First, log into any console, or gw.orbit-lab.org
+
+After logging in, create or modify the file at {{{~/.ssh/config}}}
+
+Add the following to the file
+
+{{{
+Host sdr?-md* sdr?-s?-lg* srv?-co* srv?-lg* node?-* node??-*
+  User root
+  UserKnownHostsFile /dev/null
+  StrictHostKeyChecking no
+}}}
+
+* Host: The Host line matches common naming conventions for nodes within the testbed
+* User: root is set to match the common default for baseline
+* !UserKnownHostsFile: is set to /dev/null to prevent saving new host keys for nodes
+* !StrictHostKeyChecking: disables the warning message. SSH complains when host keys for a dns name change. This is a useful security feature, but is inconvenient within the testbed, where the operating system on a trusted machine changes frequently. Do not set it as a wildcard default for public endpoints, or you will be vulnerable to spoofing or man in the middle attacks.
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