Re: [Openvpn-users] VPN clients disconnecting since 2.4

2017-07-19 Thread David Sommerseth
On 19/07/17 23:47, Geert Lorang wrote: > On 18/07/2017 10:45, Gert Doering wrote: >> This is most likely not a "2.3 -> 2.4" regression, but "old 2.3.x to >> more recent version". >> >> As the default cipher (BF-CBC) is considered weak today, if you do not >> renegotiate your keys ever so often, new

Re: [Openvpn-users] VPN clients disconnecting since 2.4

2017-07-19 Thread Geert Lorang
On 18/07/2017 10:45, Gert Doering wrote: This is most likely not a "2.3 -> 2.4" regression, but "old 2.3.x to more recent version". As the default cipher (BF-CBC) is considered weak today, if you do not renegotiate your keys ever so often, newer 2.3.x versions and 2.4 will set "reneg-bytes 64MB"

Re: [Openvpn-users] VPN clients disconnecting since 2.4

2017-07-18 Thread Gert Doering
Hi, On Mon, Jul 17, 2017 at 06:17:38PM +0200, Geert Lorang wrote: [..] > As soon as you start downloading some big(ger) files which utilize the > VPN quite heavily OpenVPN will prompt again for credentials after 1-5 > minutes and our users have to re-authenticate with their token as we use > a

Re: [Openvpn-users] VPN clients disconnecting since 2.4

2017-07-18 Thread David Sommerseth
On 17/07/17 18:17, Geert Lorang wrote: > Hi, > > Since Ubuntu 17.04 came out a few of our users have upgraded their > OpenVPN client to 2.4 but this seems to break compatibility with our > server which is still on 2.3 (latest Debian Jessie). I can reproduce > this problem on Windows as well with l

Re: [Openvpn-users] VPN clients disconnecting since 2.4

2017-07-17 Thread debbie10t
On 17/07/17 17:17, Geert Lorang wrote: Hi, If needed I can provide the entire configs. configs and logs at --verb 4 (sanitized) In advance of that, are you using (default) --cipher BF-CBC ? because that will force renegotiation after 64MB data. regards

[Openvpn-users] VPN clients disconnecting since 2.4

2017-07-17 Thread Geert Lorang
Hi, Since Ubuntu 17.04 came out a few of our users have upgraded their OpenVPN client to 2.4 but this seems to break compatibility with our server which is still on 2.3 (latest Debian Jessie). I can reproduce this problem on Windows as well with latest 2.4.3. As soon as you start downloading