you must specify the table.

with -t modif
  ----- Original Message ----- 
  From: M. Ahmad Ijaz 
  To: netfilter@lists.netfilter.org 
  Sent: Thursday, April 08, 2004 8:57 AM
  Subject: newbie question


  hi,

  I just wanna know few things , i have installed red hat 9, iptable is installed.

  Now the thing is, i didnt know at first that i have to load the modules, i was getting the message

  iptables: No chain/target/match by that name

  so after couple of searches i did find some help and i manage to apply few commands i.e.

  modprobe ip_tables
  modprobe ip_conntrack
  modprobe iptable_nat
  modprobe ip_conntrack_ftp
  modprobe ip_nat_ftp

  iptables -P INPUT ACCEPT
  iptables -P OUTPUT ACCEPT
  iptables -P FORWARD DROP
  iptables -A INPUT -p icmp --icmp-type 8 -j DROP 


  all the above commands are accepted at command prompt, but when i try to use this command

  iptables -A PREROUTING -s xxx.xxx.xxx.xxx/yyy.yyy.yyy.yyy -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080 where xxx is any IP and yyy is the subnet mask, it returns me the same message i.e. 
  iptables: No chain/target/match by that name

  So it also give the same message with POSTROUTING.


  also i dont wana load the modules and the commands each time the system starts, so when i type the commands i used iptables-save command to save tat, also is there ne possibility where i can store the command and execute when system startsup