Cisco 1812W - Integrated Services Router Wireless Configuration Manual page 101

Chapter 8 Configuring a Simple Firewall
Configure Access Lists
Perform these steps to create access lists for use by the firewall, beginning in global configuration mode:
Command
Step 1
access-list access-list-number {deny | permit}
protocol source source-wildcard [operator [port]]
destination
Example:
Router(config)# access-list 103 permit host
200.1.1.1 eq isakmp any
Router(config)#
Step 2 access-list access-list-number {deny | permit}
protocol source source-wildcard destination
destination-wildcard
Example:
Router(config)# access-list 105 permit ip
10.1.1.0 0.0.0.255 192.168.0.0 0.0.255.255
Router(config)#
Configure Inspection Rules
Perform these steps to configure firewall inspection rules for all TCP and UDP traffic, as well as specific
application protocols as defined by the security policy, beginning in global configuration mode:
Command or Action
Step 1
ip inspect name inspection-name protocol
Example:
Router(config)# ip inspect name firewall tcp
Router(config)#
Step 2 ip inspect name inspection-name protocol
Example:
Router(config)# ip inspect name firewall rtsp
Router(config)# ip inspect name firewall h323
Router(config)# ip inspect name firewall
netshow
Router(config)# ip inspect name firewall ftp
Router(config)# ip inspect name firewall
sqlnet
Router(config)#
OL-6426-02
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
Purpose
Creates an access list which prevents Internet-
initiated traffic from reaching the local (inside)
network of the router, and which compares
source and destination ports.
See the Cisco IOS IP Command Reference,
Volume 1 of 4: Addressing and Services
details about this command.
Creates an access list that allows network traffic
to pass freely between the corporate network
and the local networks through the configured
VPN tunnel.
Purpose
Defines an inspection rule for a particular
protocol.
Repeat this command for each inspection rule
that you wish to use.
Configure Access Lists
for
8-3