ZyXEL Communications P-2802H(W)(L)-I Series - Manual (Page 263)

Chapter 19 Remote Management Configuration
P-2802H(W)(L)-I Series User’s Guide
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Figure 154 Device-specific Certificate
Click Ignore in the Replace Certificate screen to use the common ZyXEL Device certificate.
You will then see this information in the My Certificates screen.
Figure 155 Common ZyXEL Device Certificate
19.5 Telnet
You can use Telnet to access the ZyXEL Device. Specify which interfaces allow Telnet access
and from which IP address the access can come.
19.6 Configuring Telnet
Click Advanced > Remote MGMT > Telnet tab to display the screen as shown. Use this
screen to specify which interfaces allow Telnet access and from which IP address the access
can come.