This can be achievded by doing dynamic updation of rule. When-ever any change in your desination address then change the rule with new value without staring or stoping iptable service command. --- kavitha <fd99127@xxxxxxxxx> wrote: > Hi, > > We are trying to modify the TCP protocol a little > but so that when a packet arrives at a router, it > would be possible to read a particular field (lets > say options or the reserved field) of the > packet(that would give the actual path that the > packet needs to take) and populate the destination > ip address of that packet with the new ipadress read > from this reserved field. I know that using dnat you > can change the destination ipaddress of the packet > but in my problem, I would not knwo the destination > ipaddress prior (it would be dynamic) and it would > change with every packet - so I would not be able to > use a static ip address in the iptables rule. So I > wanted to know if there is anyt way to get around > this , or if iptables would not provide a solution > to thsi problem at all . I knwo this can be done > using raw sockets but adding a single line (as in > iptables) seems to be a better proposition than > writing pages of code. Basically, I want to know if > there is a way to dynamically configure > the destination ipaddress that a packet is being > routed to by mapping certain other bits of the same > packet coming in. > > It would really help if someoen can provide some > information in this regard. Any pointers too would > really be useful.I looked at the man pages and > searched the internet but was not able to come > across any rela examples where such a thing may have > been used. > > Thanks for your time! Please let me know if you need > more clarifications! > Kavitha > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs
