How do i use rc.*
 

I have a script for a linux router, its called rc.firewall, i need to put it in my startup script.

Im using rh8.

Thankyou

I cant even run the script. I named it rc.firewall, when i try to run rc.firewall. Its says command not found...

This is what it looks like...

****
# setting up modules we neet to support NAT and add protocols with unordinary behavior
modprobe iptable_nat
modprobe ip_conntrack

#make sure packet forwarding enabled by kernel
echo 1 > /proc/sys/net/ipv4/ip_forward

#flushing existing tables
iptables --flush


#enable connection tracking
iptables -I FORWARD -m state --state INVALID -j DROP
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT

#allowing ssh to this machine
iptables -A INPUT -p tcp -i eth1 --dport ssh -j ACCEPT
iptables -A INPUT -p tcp -i eth0 --dport ssh -j ACCEPT
iptables -t nat -A PREROUTING -i eth1 -p tcp --destination-port ssh -j DNAT --to 211.30.39.227

#enable loopback
iptables -A INPUT -i lo -p all -j ACCEPT
iptables -A OUTPUT -o lo -p all -j ACCEPT

# accept established connections
iptables -A INPUT -i eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT

#defend against port scans and DDOS attacks
#dealing with packets w/o syn flags when they are new
iptables -A FORWARD -i eth1 -p tcp ! --syn -m state --state NEW -j LOG --log-prefix "new no-SYN: "
iptables -A FORWARD -i eth1 -p tcp ! --syn -m state --state NEW -j DROP
iptables -A FORWARD -i eth1 -p tcp --tcp-flags ACK ACK -m state --state NEW -j LOG --log-prefix "New ACK: "

#enforcing TCP standards
iptables -A INPUT -p tcp --tcp-option \! 2 -j LOG --log-tcp-options --log-prefix "TCP standards not met: "
iptables -A INPUT -p tcp --tcp-option \! 2 -j REJECT --reject-with tcp-reset


#allowing all outbound traffic
iptables -A FORWARD --in-interface eth0 --out-interface eth1 -j ACCEPT

#rewrite all connections coming from private network to use eth1 addres and rewrite response
#appropriately

iptables -t nat -A POSTROUTING -o eth1 -j SNAT --to-source 211.30.39.227

iptables -P INPUT DROP
****

Take a look here:

http://www.redhat.com/docs/manuals/l...ual/ref-guide/

Hopt this gets you going again.

What errros do you see when you try to tun the script?
Is the script executable (for the user trying to execute it)?

A bit more info is needed to help you.

No it is not executable. I just copied the script text and saved it(it is the same script as i posted b4). Im not sure how to run scripts. The script is just a bunch of commands in a file named rc.firewall.

How can i run it normally? how can i add it to my startup?

Take a look at the url I gave you, this explains al there is to know about runlevels and how to automatically start programs when you enter a certain runlevel. I.e: you boot and end up with a graphical environment [gnome, kde,xfce etc], this is called rl5 (some distro's call it rl4). If you boot and end up with a command prompt (non-gui), you end up in rl3.

About executing scripts:

To make a script executable do the following:

chmod 750 <filename> Take a look at man chmod for details.

The above command gives read/write/execute rights to the owner of the file (the first rwx), read/execute rights to the group the file belongs to (second set of three: r-x) and the rest (world) has no rights (third three: ---).

If a file is not to be found in the $PATH setting, you need to give the (full) path, or cd to that path and execute it:

/some/strange/dir/my_little_program
or
cd /some/strange/dir/
./my_little_program

Hope this helps.

if we set the runlevel to 3 in the /etc/inittab then linux acts as if the GUI had never been installed, am i right?