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VRT-401 User Manual
66
Options
Respond to
ICMP
The ICMP protocol is used by the "ping" and "trace route" pro-
grams, and by network monitoring and diagnostic programs.
• If checked, VRT-401 will respond to ICMP packets received
from the Internet.
• If not checked, ICMP packets from the Internet will be ig-
nored. Disabling this option provides a slight increase in
security.
Allow IPsec
The IPSec protocol is used to establish a secure connection, and
is widely used by VPN (Virtual Private Networking) programs.
• If checked, IPSec connections are allowed.
• If not checked, IPSec connections are blocked.
Allow PPTP
PPTP (Point to Point Tunneling Protocol) is widely used by VPN
(Virtual Private Networking) programs.
• If checked, PPTP connections are allowed.
• If not checked, PPTP connections are blocked.
Allow L2TP
L2TP is a protocol developed by Cisco for VPNs (Virtual Private
Networks).
• If checked, L2TP connections are allowed.
• If not checked, L2TP connections are blocked.
Allow TFTP
firmware up-
grade
If enabled, TFTP (Trivial FTP) connections can be made to this
device.
• TFTP can be used to upgrade the firmware. This is normally
not required, and should not be enabled unless necessary.
• You must obtain the firmware upgrade file first; instructions
for using TFTP will be available with the upgrade.