Specifications
Frame Relay Sub-Interface Config Command Set Command Reference Guide
414 © 2003 ADTRAN, Inc. 61950860L1-35D
Create the access list (this is the packet selector):
(config)#
ip access-list extended InWeb
(config-ext-nacl)#
permit tcp any host 63.12.5.253 eq 80
Create the access policy that contains the access list
InWeb
:
(config)#
ip policy-class UnTrusted
(config-policy-class)#
permit list InWeb
Associate the access list with the ethernet 0/1 interface:
(config)#
interface frame-relay 1.16
(config-fr 1.16)#
access-policy UnTrusted
Technology Review
Creating access policies and lists to regulate traffic through the routed network is a four-step process:
Step 1:
Enable the security features of the ADTRAN OS using the ip firewall command.
Step 2:
Create an access list to permit or deny specified traffic. Standard access lists provide pattern
matching for source IP addresses only. (Use extended access lists for more flexible pattern
matching.) IP addresses can be expressed in one of three ways:
1. Using the keyword any to match any IP address. For example, entering deny any will effectively
shut down the interface that uses the access list because all traffic will match the any keyword.
2. Using the host <A.B.C.D> to specify a single host address. For example, entering permit
196.173.22.253 will allow all traffic from the host with an IP address of 196.173.22.253.
3. Using the <A.B.C.D> <wildcard> format to match all IP addresses in a “range”. Wildcard masks
work in reverse logic from subnet mask. Specifying a one in the wildcard mask equates to a
“don’t care”. For example, entering deny 192.168.0.0 0.0.0.255 will deny all traffic from the
192.168.0.0/24 network.
Step 3:
Create an access policy that uses a configured access list. ADTRAN OS access policies are used to
permit, deny, or manipulate (using NAT) data for each physical interface. Each ACP consists of a
selector (access list) and an action (allow, discard, NAT). When packets are received on an interface,
the configured ACPs are applied to determine whether the data will be processed or discarded.
Possible actions performed by the access policy are as follows:
allow list <access list names>
All packets passed by the access list(s) entered will be allowed to enter the router system.
discard list <access list names>
All packets passed by the access list(s) entered will be dropped from the router system.
Usage Examples (Continued)