Unable to reach a systemd socket unit from outside but locally works
Issue
- Unable to reach a systemd socket unit from outside but locally works
- telnet from external users fails with "Connection refused"
Environment
- Red Hat Enterprise Linux 7
- Network service controlled by
systemd.socketunit - IPv4 address used to contact system with IPv6 enabled
- IPv4-mapped address disabled with
net.ipv6.bindv6onlykernel tunable (sysctl)
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