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

[Tristan]

My default setting was 2048. I changed it to 200,000 for now. I haven't
really played with sysctl at all. The only change I've ever made in there
was for swappiness.

On Mon, Aug 1, 2016 at 8:04 PM, Green Dream <greendream848 at gmail.com> wrote:

> 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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>


-- 
Finding information, passing it along. ～SuperSluether
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