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#229 fixed CUPS should not scan the local network for printers jdreed geofft

Reported by geofft, 15 years ago.


CUPS by default scans the local network for printers. While this seems at first glance to be either good or neutral. it's the case that lots of users have their personal laptops configured (incorrectly, arguably, but it still happens) to print to Athena printers and then share their local configuration of that printer.

For example, is seeing both a "tree-eater" (which I've locally configured because it's Kerberized; see ATN-28) and a "tree_eater", which someone in the dorm has set up. Users should not click an Athena cluster printer's name in the GUI and get some random laptop as their print server.

#240 fixed notify users they're in a chroot on sudo/su geofft

Reported by geofft, 15 years ago.


As I wrote to debathena@ on March 12,

We noticed on zephyr today that sudo has a lecture_file option that will cause it to print a custom message the first time you run sudo. I propose we use it to do something like

$ sudo aptitude install snes9x-x
Attention: You are on a Debathena cluster machine. Although you can use
sudo to become root, your access is restricted to a sandbox (chroot)
created when you logged in. If you install software or change
global settings, they will be reverted when you log out.

If you would like a permanent change to cluster machines, please
report a bug via the "sendbug" command.
Enter your Athena password below.

[sudo] password for geofft:

This would involve setting "Defaults lecture_file=(this warning) lecture=once" in /etc/sudoers.

Another option would be to do this with pam_echo in /etc/pam.d/sudo and /etc/pam.d/su. It has the advantage of also working for su, but making it warn you only once would be harder, so we'd probably have to say something shorter like "Warning: You are in a login sandbox. See  http://... for more information."

Another option would be for 'tellme root' to print the same warning to cover the 'su' case, although unless we change the root password nobody will notice...

After a brief discussion, we determined that sudo warns you once per session, rather than per account or whatever, so this has basically the right behavior.

I intend to go with the lecture_file approach soon, because it's an easy change, unless there's particular interest in having sudo and su use the same configuration. Comments on the wording?

#263 fixed debathena-afs-config: update-cellservdb has no manpage broder geofft

Reported by geofft, 15 years ago.


The update-cellservdb program in the debathena-afs-config package has no manpage.

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