TP-Link Archer C55 User Manual page 119

4. I want to build a WEB Server on the LAN, what should I do?
1) Because the WEB Server port 80 will interfere with the WEB management port 80 on the
router, you must change the WEB management port number to avoid interference.
2) To change the WEB management port number: Log in to the router, click the "Security"
menu on the left of your browser, and click "Remote Management" submenu. On the
"Remote Management" page, type a port number except 80, such as 88, into the "Web
Management Port" field. Click Save and reboot the router.

Note:
If the above configuration takes effect, you can visit and configure the router by typing
http://192.168.0.1:88
field of the Web browser. If the LAN IP of the modem connected with your router is
Archer C55
(the router's LAN IP address: Web Management Port) in the address
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AC1200 Wireless Dual Band Gigabit Router