# The Strict mode of RFC3704 Reverse Path filtering breaks some pretty

# common and reasonable use cases.

#

# Notably, it makes it impossible for NetworkManager to do connectivity

# check on a newly arriving default route (it starts with a higher metric

# and is bumped lower if there's connectivity).

#

# Kernel's default is 0 (no filter), systemd configures a Loose filter since

# commit 230450d4e4f1 ('sysctl.d: switch net.ipv4.conf.all.rp_filter from 1

# to 2'). However, RHEL systemd package happens to default to Strict mode

# for historic reasons. Let's override it if we're doing connectivity

# checking.

# Source route verification

net.ipv4.conf.all.rp_filter = 0