Hi, On Thu, Mar 05, 2015 at 01:57:30PM +0100, Marine B wrote: > I'am currently facing a problem using OpenVPN. > > We are using tun over tcp. > > When our client are using FTP(Maybe also for some other protocols) to > transfer some file, the file transfer is somtimes stopped and on my log I > got the following error: > MBUF: mbuf packet dropped > MBUF: mbuf packet dropped > MBUF: mbuf packet dropped > MBUF: mbuf packet dropped > > This is a problem and I would like to know who had the same problem and if > anybody know how to fix this.
If the underlying TCP connection stalls (due to packet loss and retransmits),
OpenVPN cannot push more data through it - so if there is more data coming
in from the tun interface, OpenVPN will have to drop it.
In general, TCP-over-TCP is a bad idea, so tun over UDP is preferred.
gert
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