TP-Link T1600G-18TS Configuration Manual page 557

Configuring ACL
4) Choose the menu ACL > Policy Config > Policy Create to load the following page.
Configure Rule 4 and Rule 5 to permit packets with source IP 10.10.70.0 and with
destination port TCP 53 or UDP 53 (DNS service port).
Figure 3-6 Configuring Rule 4
Figure 3-7 Configuring Rule 5
5) Choose the menu ACL > Policy Config > Policy Create to load the following page.
Configure Rule 6 to deny packets with source IP 10.10.70.0.
Configuration Example for ACL
Configuration Guide 534