ICMP echo

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#1 Sat, 2016-10-08 22:19
mmix
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Hi, i have tested alpine awall with grc shieldsup.
https://www.grc.com/shieldsup

result was ping reply failed(ICMP Echo requests).

it would be useful if more example for awall configuration.

i can do this in iptables but i don't know how do this in awall.

--

Solicited TCP Packets: PASSED — No TCP packets were received from your system as a direct result of our attempts to elicit some response from any of the ports listed below — they are all either fully stealthed or blocked by your ISP. However . . .

Unsolicited Packets: PASSED — No Internet packets of any sort were received from your system as a side-effect of our attempts to elicit some response from any of the ports listed above. Some questionable personal security systems expose their users by attempting to "counter-probe the prober", thus revealing themselves. But your system remained wisely silent. (Except for the fact that not all of its ports are completely stealthed as shown below.)

Ping Reply: RECEIVED (FAILED) — Your system REPLIED to our Ping (ICMP Echo) requests, making it visible on the Internet. Most personal firewalls can be configured to block, drop, and ignore such ping requests in order to better hide systems from hackers. This is highly recommended since "Ping" is among the oldest and most common methods used to locate systems prior to further exploitation.

iptables -A OUTPUT -p icmp --icmp-type echo-request -j DROP

OR

iptables -A OUTPUT -p icmp --icmp-type 8 -j DROP