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Chapter 23    Remote Management
139
If an outside user attempts to probe an unsupported port on your Router, an ICMP response packet 
is automatically returned. This allows the outside user to know the Router exists. Your Router 
supports anti-probing, which prevents the ICMP response packet from being sent. This keeps 
outsiders from discovering your Router when unsupported ports are probed. 
Figure 101 Maintenance > Remote MGMT > ICMP
 
Table 85   Maintenance > Remote MGMT > ICMP
LABEL
DESCRIPTION
Respond to Ping 
on
The Router will not respond to any incoming Ping requests when Disable is selected. 
Select LAN to reply to incoming LAN Ping requests. Select WAN to reply to incoming 
WAN Ping requests. Otherwise select LAN & WAN to reply to both incoming LAN and 
WAN Ping requests. 
Secured Client IP 
Address
A secured client is a “trusted” computer that is allowed to send Ping requests to the 
Router.
Select All to allow any computer to send Ping requests to the Router.
Choose Range to just allow the computers with an IP address in the range that you 
specify to send Ping requests to the Router.
 
23.8  SSH/SCP/SFTP Screen
Secure Shell (SSH) is a secure communication protocol that combines authentication and data 
encryption to provide secure encrypted communication between two hosts over an unsecured 
network. The following file transfer methods use SSH:
• Secure Copy Protocol (SCP) is a secure way of transferring files between computers. It uses port 
22.
• SSH File Transfer Protocol or Secure File Transfer Protocol (SFTP) is an old way of transferring 
files between computers. It uses port 22.
You can use SSH to securely access the Router’s command line interface. Specify which interfaces 
allow SSH access and from which IP address the access can come.