script needed

[Shaw, Marco]

> #!/bin/bash
>  
> IPADDRLIST=`tail -50 /var/log/messages | grep "<line 
> pattern>" | awk '{print
> $<ip addr field number>}' | sort | uniq`
>  
> for IPADDR in $IPADDRLIST
> do
> 	IPADDRCNT=`tail -50 /var/log/messages | grep "<line 
> pattern>" | grep
> -c $IPADDR`
>  
> 	if [[ $IPADDRCNT -ge 10 ]]
> 	then
> 		EXISTS=`grep -c $IPADDR /etc/hosts.deny`
> 
> 		if [[ $EXISTS -eq 0 ]]
> 		then
> 			echo $IPADDR >> /etc/hosts.deny
> 		fi
> 	fi
> done

It's a slow Friday at work... ;-)

Sorry, I think I found another little problem.

Here: EXISTS=`grep -c $IPADDR /etc/hosts.deny`

You might grep for 10.10.10.10 in /etc/hosts.deny, which would
also match possibly an existing 10.10.10.100 entry by error.

I think you may have to go with changing this line to something like:

EXISTS=`grep -c "^${IPADDR}$" /etc/hosts.deny`

I realize your script is just supposed to be somewhat of a guide.

Sorry again, for the critiques (spelling?).

Marco