I'm trying some network programming using tun interfaces to tunnel WAN traffic through user-space programmes at each end, which will perform compression and other magic on tcp streams. The userspace programmes then communicate across the WAN, using less bandwidth than the uncompressed data would have. Looking at the documentation for twisted-pair and python-eunuchs it looks as if they haven't been maintained for years - eunuchs last changed about 5-6 years ago. Is it going to make my life easier to mock things up in Twisted, to get things algorithmically correct, before porting partly/entirely to C for performance (if necessary)? (I'm looking at supporting >10Mbit/s on Core2 processors, with >100 simultaneous connections.) If Twisted would cause me to spend a large amount of time wrestling with Twisted-pair/Eunuchs problems, I'm probably better of starting with C. (I'm familiar with both Twisted and C, but not the tun interface, nor the innerworkings of the tcp protocol yet - I was hoping that the source of twisted-pair might help educate me.) Has anyone used these packages recently (2.6 kernel)? Thanks, Chris. P.S. Can anyone recommend any good articles on using the tun interface and interpreting/processing tcp packets?