"Data Collation" Cisco [ACL]
Access-list{1) Standard access list: range: (1 to 99) check: Ipusage: access-list access-list-number {permit|deny} source [wildcard-mask]test conditions: Check all the address bits (Match all) an ip host address,i.e. 192.168.20.33 0.0.0.0//equivalent to: host 192.168.20.330.0.0.0 -> check all bitsTest conditions: Ignore all the address bits (Match any) any ip host address,i.e. 0.0.0.0 255.255.255.255//equivalent to: any255.255.255.255 - > ignore all bits#1 Permit my network only#access-list 1 permit 172.16.0.0 0.0.255.255 (implicit deny all - not visible in the list) (access-list 1 deny 0.0.0.0 255.255.255.255) #2 deny a specific host#access-list 1 deny 172.16.4.13 0.0.0.0 access-list 1 permit 0.0.0.0 255.255.255.255 (Implicit deny all) (access-list 1 deny 0.0.0.0 255.255.255.255) #3 deny a specific subnet#access-list 1 deny 172.16.4.0 0.0.0.255access-list 1 permit any (Implicit deny all) (access-list 1 deny 0.0.0.0 255.255.255.255) #VTY: allow Remote 172.16.10.3 to use vty a (config) #access-list 50 permit 172.16.10.3A (config) #line vty 0 4a (config-if) #access-class 50 in2) Extend access list: range: (100 to 199) check: tcp src_addr dest_ addr & protocol & portusage: access-list access-list-number { permit | deny&nbSP;} protocol source source-wildcard [operator port] destination destination-wildcard [ operator port ] #4 Deny FTP from subnet 172.16.4.0 to subnet 172.16.3.0 out of e0#access-list 101 deny tcp 172.16.4.0 0.0.0.255 172.16.3.0 0.0.0.255 eq 21access-list 101 deny tcp 172.16.4.0 0.0.0.255 172.16.3.0 0.0.0.255 eq 20access-list 101 permit Ip any any (Implicit deny all) (access-list 101 deny ip 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255) #5 deny only telnet from subnet 172.16.4.0 out of E0#access-list 101 deny tcp 172.16.4.0 0.0.0.255 &nbsP;any eq 23access-list 101 permit ip any any (Implicit deny all) 3) named acla (config) #ip access-list standard blocksalesa (config-std-nacl) #deny 172.16.40.0 0.0.0.255A (CONFIG-STD-NACL) #permit anya (config) #int f0/0a (config-if) #ip Access-group blocksales out}
"Data Collation" Cisco [ACL]