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https://bro-tracker.atlassian.net/browse/BIT-1498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=24804#comment-24804
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Jon Schipp commented on BIT-1498:
---------------------------------
I think the ssh messages are helpful in debugging problems but you're right we
probably don't want to see the banner.
Some notes:
The banner prints when sshd_config is set to use the Banner option. Banner
happens before authentication. The motd is not printed when the PrintMotd
option is used.
root@manager:~# broctl start
starting manager ...
starting proxy-1 ...
starting worker-1 ...
starting worker-2 ...
This BANNER is displaying /etc/issue.net
Ubuntu 14.04.1 LTS
Stopping sshd on node1 will show banner and the informational ssh messages:
root@manager:~# broctl start
manager still running
proxy-1 still running
ssh: connect to host 10.1.1.20 port 22: Connection refused
This BANNER is displaying /etc/issue.net
Ubuntu 14.04.1 LTS
Error: cannot connect to worker-1
worker-2 still running
Stopping sshd on node1 while -q is set in ssh_runner.py yields a "Error: cannot
connect", not the ssh errors.
root@manager:~# broctl start
...
Error: cannot connect to worker-1
worker-2 still running
Shutting down the node will yield
root@manager:~# broctl start
...
ssh: connect to host 10.1.1.20 port 22: No route to host
Error: cannot connect to worker-1
> add '-q' to ssh execution in ssh_runner.py
> ------------------------------------------
>
> Key: BIT-1498
> URL: https://bro-tracker.atlassian.net/browse/BIT-1498
> Project: Bro Issue Tracker
> Issue Type: Patch
> Components: BroControl
> Affects Versions: 2.4
> Reporter: scampbell
> Assignee: Jon Schipp
> Priority: Trivial
> Labels: broctl
> Fix For: 2.5
>
>
> When using broctl in an environment with login banners, they will be
> displayed in the broctl command. In the event that they can not be
> configured away on the sshd end using '-q' avoids displaying the banner on
> the client side.
> The patch is trivial:
> --- a/BroControl/ssh_runner.py
> +++ b/BroControl/ssh_runner.py
> @@ -108,6 +108,7 @@ class SSHMaster:
> self.base_cmd = [
> "ssh",
> "-o", "BatchMode=yes",
> + "-q",
> host,
> ]
> self.need_connect = True
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