The Telnet Screen - ZyXEL Communications P-660HW-Tx v3 User Manual

Chapter 18 Remote Management

18.3 The Telnet Screen

You can use Telnet to access the ZyXEL Device's command line interface. Specify
which interfaces allow Telnet access and from which IP address the access can
come.
To enable Remote Management from the WAN for Telnet access:
Go to Advanced > Remote MGMT > Telnet and set Access Status to ALL (or
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WAN & LAN or WAN & WLAN).
Note: IMPORTANT! If you choose WAN it will ONLY allow access from the WAN.
Next click on the Firewall link in Note3 of the screen. For WAN access: If you want
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to specify the source IP address for remote management, click on the Firewall
link. This will then redirect you to the main Firewall screen (Security >Firewall >
General).
Here you will choose the Custom option (please note that the Custom option will
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inherit the default firewall behaviour of the firewall option that was specified
previously (High or Medium, BUT NOT for Low as it blocks WAN to LAN access
but this can easily be changed).
Next go to the Rules tab and in Packet direction choose WAN to WAN/Router.
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Click the Add button.
In the Edit rule page that appears you may want to change the source address
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from Any. Otherwise in Service > selected services remove Any(TCP) and
Any(UDP) and move Telnet(TCP:23) from available services to selected
services. Now click on the Apply button.
Note: it is recommended if you are allowing WAN access even temporarily to change
the default password (in Maintenance > System > General).
To remove Telnet remote management:
Go to Advanced > Remote MGMT > Telnet and set Access Status to LAN,
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WLAN, WLAN & LAN or Disabled.
Next go to Security > Firewall > General. There will be a Rules tab if Custom
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is specified as the firewall option.
In Packet direction choose WAN to WAN/Router.
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Untick the Active tick box for your remote management rule and click the Apply
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button.
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P-660HW-Tx v3 User's Guide