For starters, PING is ICMP not UDP and not port based. As I recall, NistNet will only deal with a PING if all traffic between two IPs is 'filtered'.
The NistNet system needs to be viewed as a router between two subnets. You are involving the NistNet system directly in your data flow for the ping. I can recall many attempts of the 2+ years I've followed this list where folks have wanted to run NistNET on one end of the filtered connection. I can't recall anyone reporting success. I think the way that NISTNet grabs packets is not compatible with what you are trying to arrange. Ping is not going to ever deal with ports so your basic desire won't work. You might, stress 'might', be able to use machine B as both ends but you would have to establish two subnets. Even then it is likely that the linux system will just ignore your desire and route within the system. Hardware is REALLY cheap these days ... if you have an experiment worth conducting you are better off setting up 3 machines with two endpoints and NistNet. You might beable to run Xen on a dual physical interface system with appropriate network bridging and interface binding so that the xen system DomUs could be your endpoints and perhaps NistNet. On Thu, 3 Aug 2006, lu jeff wrote: > Hi All: > here is my enviroement ,I have installed nistnet, assumed it workable. > > machine A: 192.168.1.252 run nistnet on it > machine B: 192.168.1.189 here I use udp port 10000 and 10002 > > I wanna ping or make a call in tis way: > mach B :10000.udp -->mach A --> mach B: 10002.udp > > so I setup entry: > cnistnet -a 192.168.1.189:10000.udp 192.168.1.252 --delay 200 > cnistnet -a 192.168.1.252 192.168.1.189:10002.udp > > and then I use cnistnet -u > > but when I ping from 192.168.1.189 , the time is about 1ms, does it mean > nistnet not workable? > > even I use etherreal to capture the packet, there is not packet from > 252 to > 189? > > what's happend? > > any suggestion is welcome! > > > thanks, > Jeff > > nistnet@antd.nist.gov > > > _______________________________________________ > nistnet mailing list > nistnet@antd.nist.gov > http://www-x.antd.nist.gov/mailman/listinfo/nistnet > _______________________________________________ nistnet mailing list nistnet@antd.nist.gov http://www-x.antd.nist.gov/mailman/listinfo/nistnet
