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Cisco ACL
1.
Access Control List
2009 © Alexander Rybolovlev
2.
A TCP Conversation
SMTP 25 POP3 110 IMAP 143 HTTP 80 HTTPS 443 DNS 53 FTP-DATA 20 FTP 21 TFTP 69 SNMP 169 NTP 123
3.
4.
5.
Where To Place
ACLs
6.
Standard ACL [no]
access-list acl-num {deny|permit|remark} [ source [source-wildcard]] [log] access-list 2 deny 192.168.10.1 access-list 2 permit 192.168.10.0 0.0.0.255 access-list 2 deny 192.168.0.0 0.0.255.255 access-list 2 permit 192.0.0.0 0.255.255.255 Router# show access-lists Standard IP access list 99 10 permit host 192.168.99.0 20 permit host 192.168.98.0 Router#conf t Router(config)#no access-list 99 Router(config)#end Router#show access-lists Router# Router(config)#access-list 10 remark Acces_to_LAN Router(config)#access-list 10 permit 192.168.10.0 Router(config-if)# ip access-group {access-list-number | access-list-name} {in | out} Router(config)#access-list 1 permit ip 192.168.10.0 0.0.0.255 Router(config)#interface FastEthernet0/0 Router(config-if)#ip access-group 1 out
7.
Example
8.
Example
9.
Example
10.
Example
11.
Edit Standard ACL
#1 R1# show running-config | include access-list access-list 20 permit 192.168.10.100 access-list 20 deny 192.168.10.0 0.0.0.255 #2 access-list 20 permit 192.168.10.11 access-list 20 deny 192.168.10.0 0.0.0.255 #3 R1# conf t R1(config)# no access-list 20 R1(config)#access-list 20 remark Access for permit host 10.11 R1(config)# access-list 20 permit 192.168.10.11 R1(config)# access-list 20 deny 192.168.10.0 0.0.0.255
12.
Naming ACL Router(config)#
ip access-list [standart | extended] name Router(config-std-nacl)# [no] [num] {deny|permit|remark} … Router(config)#ip access-list standard Bumburum Router(config-std-nacl)#deny host 192.168.0.1 Router(config-std-nacl)#permit 192.168.0.0 0.0.0.255 Router#sh access-lists Standard IP access list Bumburum 10 deny host 192.168.0.1 20 permit 192.168.0.0 0.0.0.255 Router(config-if)# ip access-group {access-list-number | access-list-name} {in | out} Router(config-if)#ip access-group Bumburum out
13.
Edit ACL Router#
show access-lists {acl-num|name} Router#sh access-lists 99 Standard IP access list 99 10 permit host 192.168.9.9 20 permit host 192.168.9.11 Router(config)# ip access-list {standart | extended} {acl-num|name} Router(config-std-nacl)# [no] [num] {deny|permit|remark} … Router#sh access-lists standard 99 Router(config-std-nacl)#15 permit host 192.168.9.10 Router#sh access-lists 99 Standard IP access list 99 10 permit host 192.168.9.9 15 permit host 192.168.9.10 20 permit host 192.168.9.11
14.
Extended ACL R1(config)#
access-list 101 permit tcp any eq ?
15.
Example
16.
Example
17.
Example
18.
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