IP TABLES ( FIREWALL ) - 1

Iptables / Firewall is Kernel Level Firewall

Its used Hardware Firewall

Iptables is package

rpm   -qa  |  grep  -i  iptable ------check iptable install or not

/etc/init.d/iptables status  ----check iptable service status

TASK

No one access my pc – i want to block all the traffic / network  ---its load on ram (temporary )

# iptable    -A   I NPUT  –s   0.0.0.0/0.0.0.0   –j   REJECT     ---its load on ram (temporary )

#  service iptables save    --- for persist / permanent  rules

Iptable  ----   it’s a command  / utility / tool

A         ------ Appended / ADD

INPUT  ----- chain

s   ------    Source

0.0.0.0/0.0.0.0   ----- network

INPUT –s 0.0.0.0/0.0.0.0  --- rules

j  --------- jump

REJECT  ----- Action /  Target

D   ----   Destination

F   ------   Flush

# ipitables  -L   -----check rules

# iptable    -A   I NPUT  –s   192.168.1.94/32   –j   REJECT    --  block only 94 ip

#  service iptables save    --- for persist / permanent  rules

# ipitables   -F   ----- to remove all rules but temporary

#  service iptables save    --- for persist / permanent  iptables

# iptables    -D   I NPUT  2   ---- Delete 2^nd no of rules