Re: [cobalt-users] RAQ4R Lockup/Crash and Over Heating??

[Bruce Timberlake <bruce@xxxxxxxxxx>]

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> I know this may be a little extreme but is there any way to
> completely block traffic from a entire country code like .fr ??

Since FTP is triggered from an inetd connection, the easiest way to 
block entire TLDs is to use tcpwrappers and /etc/hosts.allow and 
/etc/hosts.deny.  In your /etc/hosts.deny file, you could put a line 
like:

in.proftpd: ALL: ALL

Which denies FTP from everyone. Then in /etc/hosts.allow you 
explicitly allow who will connect like this:

in.proftpd: ALL EXCEPT .fr

If you have multiple TLDs to block you could put:

in.proftpd: ALL EXCEPT .fr, .cn, .tw

Note: this only works for daemons spawned from inetd.  Things like 
httpd or sshd (standalone daemons) need other control mechanisms.

> A silly question but I don't remember how to run "TOP".  Can you
> give me a quick overview??

Run 'top' as any user (will only be able to kill your own jobs though; 
run as root to be able to control all jobs on the system).

Press '?' for help; it's all laid out there.  Useful keys are 'k' to 
kill a process (you give PID and signal to send), 'q' to exit top, 
'W' to write current settings to .toprc for current user so you don't 
have to re-enter them next time (you can set update refresh time, 
sort order, etc).

- -- 
Bruce Timberlake

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