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+# ICMP ECHO requests (ping)
+
+Some games rely on ICMP ECHO requests to detect network connectivity,
+or to measure connection ping.
+
+Proton supports sending ICMP ECHO requests using RAW sockets or DGRAM
+ICMP sockets, but the former requires elevated priviledges, and the
+latter may also be disabled by default.
+
+DGRAM ICMP sockets can be enabled for a given set of user groups by
+running the following command, and will stay enabled until next reboot:
+
+```
+sudo sysctl -w net.ipv4.ping_group_range="<low> <high>"
+```
+
+Where <low> (resp <high>) is lower bound (resp higher) of the user
+groups which will be allowed to create such sockets. It is possible to
+enable them for any group by using "0 4294967295".
+
+In order for the configuration to be persistent, it is possible to add
+the following line to `/etc/sysctl.conf` (or a file in `/etc/sysctl.d`):
+
+```
+net.ipv4.ping_group_range="<low> <high>"
+```