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Avoid dropping of connection
Posted: Tue Mar 08, 2011 1:42 pm
by genlight
Is there a proper way to install openvpn server or what is the proper script so that if the wireless connection type changes it will not drop the connection.
Re: Avoid dropping of connection
Posted: Tue Mar 08, 2011 9:27 pm
by Douglas
genlight wrote:Is there a proper way to install openvpn server or what is the proper script so that if the wireless connection type changes it will not drop the connection.
If your connection changes, or rather, your IP.. the connection will always drop..
Re: Avoid dropping of connection
Posted: Thu Mar 10, 2011 12:29 am
by genlight
I think my Ip will not change because I am already connected with that on the server with the vpn connection. So I am isolating the cause of the problem on the connection signal type.
The situation here is that when the wireless modem signal type change from hsdpa to 3g or to wcdma or to any signal type or vice versa, the vpn connection will immediately drop.
Please kindly help me out guys about this problem.
Moreover, can you also guide me how I can make the vpn connection faster and with lowest latency possible. Thank you very much.
I am not very good using openvpn, I am a beginner reading and learning on this site. Some of what I do to solve my problem is googling but unfortunately not all answers to my question can be found there so I ask for your assistance and guidance guys.
Thank you in advance.
Re: Avoid dropping of connection
Posted: Thu Mar 10, 2011 7:06 am
by janjust
if your internet connection changes, i.e. your non-VPN IP changes, then the VPN connection will always be dropped - this is a security measure and there's very little you can do about it.
If you can switch from 3g to CDMA to etc without being assigned a new IP address (from the ISP) then the openvpn connection should survive short interruptions (especially when configured using 'proto udp').
Re: Avoid dropping of connection
Posted: Thu Mar 10, 2011 7:16 am
by genlight
someone told me to change my mtu to 1492 and lower my TTL in my server conf file so that it will help the dropping problem. do you agree?
What is the proper ttl for that? and where to edit that TTL.
Re: Avoid dropping of connection
Posted: Thu Mar 10, 2011 8:42 am
by janjust
AFAIK there is no concept of TTL (time to live) in openvpn; I don't know of any way to alter "the TTL" in the server config.
If dropped connections are your main concern then I'd start out with
(for UDP based connections). For TCP based connections I'd use
I'd avoid messing with the tun-mtu unless you absolutely have to.