/ip firewall address-list
Firewall address lists allow a user to create lists of IP addresses grouped together under a common name. Firewall filter, mangle and NAT facilities can then use those address lists to match packets against them.
The address list records can also be updated dynamically via the action=add-src-to-address-list or action=add-dst-to-address-list items found in NAT, Mangle and Filter facilities.
Firewall rules with action add-src-to-address-list or add-dst-to-address-list works in passthrough mode, which means that the matched packets will be passed to next firewall rules.
|address (DNS Name | IP address/netmask | IP-IP; Default: )||A single IP address or range of IPs to add to address list or DNS name. You can input for example, '192.168.0.0-192.168.1.255' and it will auto modify the typed entry to 192.168.0.0/23 on saving.|
|list (string; Default: )||Name for the address list of the added IP address|
|timeout (time; Default: )||Time after address will be removed from address list. If timeout is not specified, the address will be stored into the address list permanently.|
Note: If the timeout parameter is not specified, then the address will be saved to the list permanently to the disk. If a timeout is specified, the address will be stored on the RAM and will be removed after a system's reboot.
The following example creates a dynamic address list of people that are connecting to port 23 (telnet) on the router and drops all further traffic from them for 5 minutes. Additionally, the address list will also contain one static address list entry of 126.96.36.199/32 (www.example.com):
/ip firewall address-list add list=drop_traffic address=188.8.131.52/32
/ip firewall address-list print Flags: X - disabled, D - dynamic # LIST ADDRESS 0 drop_traffic 184.108.40.206
/ip firewall mangle add action=add-src-to-address-list address-list=drop_traffic \ address-list-timeout=5m chain=prerouting dst-port=23 protocol=tcp /ip firewall filter add action=drop chain=input src-address-list=drop_traffic
/ip firewall address-list print Flags: X - disabled, D - dynamic # LIST ADDRESS 0 drop_traffic 220.127.116.11 1 D drop_traffic 18.104.22.168 2 D drop_traffic 10.5.11.8
As seen in the output of the last print command, two new dynamic entries appeared in the address list (marked with a status of 'D'). Hosts with these IP addresses tried to initialize a telnet session to the router and were then subsequently dropped by the filter rule.
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