Motorola NVG510 User Manual download pdf (Page 15)

Firewall – Advanced Settings – Allowing Ping

Page 15

By default the U-verse RG does not reply to Ping or

Trace and does not allow those to be passed thru the

firewall from the WAN side.

To enable Ping and Trace two settings must be

changed. This can be done on the Settings / Firewall /

Advanced Configuration page

Stealth Mode – Remove the check mark. This settings

by default means the RG does not itself respond to

ICMP queries.

Block Ping – Remove the check mark. This setting is

what will allow Ping and Trace commands through the

firewall from the LAN side.

NOTE – at this time the consistency of the replies even

with these settings will vary.

A note about ping and trace – the standard form of IP Ping

and Trace use ICMP requests.

ICMP requests are quite often not answered or answered with

a very low priority. Actual data traversing the same hop has a

higher priority and does not experience the same delay. So

for example in a trace today you may see time outs but the

trace completes. The time outs do not indicate a problem but

instead indicate only that those hops are configured not to

reply to ICMP requests. Also if the destination device is set to

not reply then a ping or trace can time out and still not be an

accurate indicator of if there is a problem.

This is mentioned to keep in mind not to use this as your only

or even primary trouble indicator.

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Motorola NVG510 User Manual Page 15