[tor-relays] Syslog: Kernel TCP: Too many orphaned sockets

[Green Dream]

It's related to /proc/sys/net/ipv4/tcp_max_orphans

"Maximal number of TCP sockets not attached to any user file handle, held
by system. If this number is exceeded orphaned connections are reset
immediately and warning is printed."

So, I'd start by checking the value of tcp_max_orphans (with "cat
/proc/sys/net/ipv4/tcp_max_orphans"). The widely distributed sysctl.conf
tweaks for Linux relays suggests a value of 262144. I think the default in
many distros may be 4096, perhaps too low for an Exit.

Some references:

https://serverfault.com/questions/624911/what-does-tcp-too-many-orphaned-sockets-mean
https://raw.githubusercontent.com/torservers/server-config-templates/master/sysctl.conf

If you need help making the sysctl tweaks let me know.
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