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From 54faef034bb2062ed8afa72e2c1be40ef7cc41c5 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 26 Jul 2019 09:25:09 +0200
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Subject: [PATCH] Revert "Revert "sysctl: Enable ping(8) inside rootless Podman
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containers""
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This reverts commit be74f51605b4c7cb74fec3a50cd13b67598a8ac1.
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Let's add this again. With the new sysctl "-" thing we can make this
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work.
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Resolves: #2037807
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(cherry picked from commit 0338934f4bcda6a96a5342449ae96b003de3378d)
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---
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sysctl.d/50-default.conf | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/sysctl.d/50-default.conf b/sysctl.d/50-default.conf
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index e0afc9c702..21ae1df13d 100644
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--- a/sysctl.d/50-default.conf
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+++ b/sysctl.d/50-default.conf
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@@ -33,6 +33,14 @@ net.ipv4.conf.all.accept_source_route = 0
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# Promote secondary addresses when the primary address is removed
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net.ipv4.conf.all.promote_secondaries = 1
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+# ping(8) without CAP_NET_ADMIN and CAP_NET_RAW
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+# The upper limit is set to 2^31-1. Values greater than that get rejected by
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+# the kernel because of this definition in linux/include/net/ping.h:
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+# #define GID_T_MAX (((gid_t)~0U) >> 1)
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+# That's not so bad because values between 2^31 and 2^32-1 are reserved on
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+# systemd-based systems anyway: https://systemd.io/UIDS-GIDS.html#summary
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+net.ipv4.ping_group_range = 0 2147483647
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+
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# Fair Queue CoDel packet scheduler to fight bufferbloat
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net.core.default_qdisc = fq_codel
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