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Gre tunnel throughput
I currently have a gre tunnel using one of my additional ip on my Ovh vps to protect a non ddos protected server at a other host the ping between two server is 12ms.
The issue am having is poor network speed incoming on the remote end of the tunnel but the upload speed via the tunnel is ok.
Back-end server -> Ovh vps -> internet is fine but Internet -> Ovh -> Back-end server is slow less than 100KB/s.
All testing was done of a different vps which is not a part of the tunnel
scp transfer pulling file from back-end server via tunnelled ip
root@deadpool:~# scp ryan@***:test.zip ~ 100% 292MB 10.4MB/s 00:28
Fine as Ovh vps is only 100Mbps
Scp transfer pushing a file to the back-end server via tunnelled ip
root@deadpool:~# scp test.zip ryan@****:~ 2% 6800KB 67.3KB/s 1:12:23 ETA^ test.zip
Crap network speed
If i do a scp download or upload using the back-end server ip and not going via the tunnel the speed is 73.0MB/s.
Anymore got any idea's how to increase the throughput Internet -> tunnel as 67.3KB/s is not very useful.
Comments
It seems you have some MTU problems. Have a look at http://techbackground.blogspot.de/2013/06/path-mtu-discovery-and-gre.html
Thanks i will look into that later, any idea why a mtu issue would only effect one way of the tunnel not both.
Iv'e played around with the mtu still the same on Internet -> tunnel -> back-end
I've put the mtu back to which the gre tunnel defaulted to
If anymore is able to give advice which is able to fix the speed issue on the gre tunnel they can have $25 paypal to them.
OVH you said ? It's possible they rate limited GRE to deal with IOT DDOS attacks.
Francisco
It's possible if so its a bit funny to just rate limit it one way, i might open a ticket later with ovh.
@Francisco
I've opened a ticket with Ovh, if Gre protocol is rate limited outgoing, do you know of any other way i can tunnel between the 2 server i what to be able to use any tcp/udp ports via the tunnel.
Ryan
You could try using a VPN to link the two? I suggest Tinc.
I've managed to fix the issue by switching to a ipip tunnel forgot about them similar to gre tunnel but speed is fine both way but thanks for the idea to use tinc anyway.