too many I/O wait events

[mimu]

Hello.
I updated my APU Board to pfSense 2.5.1.
On the start page i have a box showing the openVPN connections. I use two openVPN servers. On both there are connected clients. VPN is working, but on the second server the clients are not listed. The log (openVPN) says "Error: poll: too many I/O wait events".

What could be the reason?

[BigMikeSK]

@mimu Hello,
how did you resolve this issue? I have a similar problem.

Thank you.

[mimu]

@bigmikesk
Unfortunately, I have not found a solution so far...

[rbt]

check the concurrent connections limit

[mimu]

@rbt said in too many I/O wait events:

check the concurrent connections limit

This works. Value was 1, with 2 i can see the connection. But why?

[Gertjan]

@mimu
Like OpenVPN needs a 'command channel' and a 'data channel' ? ;)

[mimu]

Ok, but that also means that two clients could then connect?

[Gertjan]

@mimu

I'm using the OpenVPN server just as access for myself for remote administration.
So, multiple connections, for me, is a rare thing.

Still, I've set :

because : why not.

I guess (OpenVPN doc should explain more), as soon as a 'client' tries to connect, a 'slot' is allocated.
If you have many 'clients' that try, and these are just scripted scanners looking for less protected (NON TLS) VPN access, slots can allocated fast.
Again : I guess.

I've not (never) seen "I/O wait events" in my OpenVPN logs.
I'm using two OpenVPN servers , port 1194 and port 1195. Both are completely separated, and work fine both. Both servers use TLS, and no user+pasword.