Brocade Virtual ADX Security Guide (Supporting ADX v03.1.00) User Manual
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Brocade Virtual ADX Security Guide
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Configuring numbered and named ACLs
2
The first entry permits ICMP traffic from hosts in the 10.157.22.x network to hosts in the
10.157.21.x network.
The second entry denies IGMP traffic from the host device named “rkwong” to the 10.157.21.x
network.
The third entry denies IGRP traffic from the 10.157.21.x network to the host device named
“rkwong”.
The fourth entry denies all IP traffic from host 10.157.21.100 to host 10.157.22.1.
The fifth entry permits all packets that are not explicitly denied by the other entries. Without this
entry, the ACL would deny all incoming IP traffic on the ports to which you assign the ACL.
The following commands apply ACL 102 to the incoming traffic on port 1/2 and to the incoming
traffic on port 4/3.
Here is another example of an extended ACL.
The first entry in this ACL denies TCP traffic from the 10.157.21.x network to the 10.157.22.x
network.
The second entry denies all FTP traffic from the 10.157.21.x network to the 10.157.22.x network.
The third entry denies TCP traffic from the 10.157.21.x network to the 10.157.22.x network, if the
TCP port number of the traffic is less than the well-known TCP port number for Telnet (23), and if
the TCP port is not equal to 10. Thus, TCP packets whose TCP port numbers are 5 or are greater
than 23 are allowed.
The fourth entry denies UDP packets from any source to the 10.157.22.x network, if the UDP port
number from the source network is 5 or 6 and the destination UDP port is 7 or 8.
The fifth entry permits all packets that are not explicitly denied by the other entries. Without this
entry, the ACL would deny all incoming IP traffic on the ports to which you assign the ACL.
The following commands apply ACL 103 to the incoming traffic on ports 2/1 and 2/2.
Virtual ADX (config)#access-list 102 perm icmp 10.157.22.0/24 10.157.21.0/24
Virtual ADX (config)#access-list 102 deny igmp host rkwong 10.157.21.0/24
Virtual ADX (config)#access-list 102 deny igrp 10.157.21.0/24 host rkwong
Virtual ADX (config)#access-list 102 deny ip host 10.157.21.100 host
10.157.22.1
Virtual ADX (config)#access-list 102 deny ospf any any
Virtual ADX (config)#access-list 102 permit ip any any
Virtual ADX (config)#int eth 1/2
Virtual ADX (config-if-1/2)#ip access-group 102 in
Virtual ADX (config-if-1/2)#exit
Virtual ADX (config)#int eth 4/3
Virtual ADX (config-if-4/3)#ip access-group 102 in
Virtual ADX (config)#write memory
Virtual ADX (config)#access-list 103 deny tcp 10.157.21.0/24 10.157.22.0/24
Virtual ADX (config)#access-list 103 deny tcp 10.157.21.0/24 eq ftp 10.157.22.0/24
Virtual ADX (config)#access-list 103 deny tcp 10.157.21.0/24 10.157.22.0/24 lt
telnet neq 5
Virtual ADX (config)#access-list 103 deny udp any range 5 6 10.157.22.0/24 range 7
8
Virtual ADX (config)#access-list 103 permit ip any any