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