questions about /tmp

I've been having problems with script kiddies lately and have been finding random things in /tmp /var/tmp and have found something in /dev/shm

my question is what can I do to not allow things to be executed from those locations. my problem is that when layeredtech set up the server they set everything up on one partition so I'm not able to pass options for /tmp in /etc/fstab

this is what my /etc/fstab looks like.

# This file is edited by fstab-sync - see 'man fstab-sync' for details
LABEL=/ / ext3 defaults,usrquota,grpquota 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/hda2 swap swap defaults 0 0


does anybody have any suggestions for me?

 

 

 

 

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