I am developing an application which takes the information of interfaces from one system, and adds it in the routing tabel of another system. It is sort of a routing protocols but my particular domain is the ForCES (Forwarding and Control Element Separation) topic. All is working fine except for the behaviour of the ioctl() call. I am using VMware and Fedora Core-4 as one guest and Fedora Core-5 as the other. Windows XP is the guest for vmware. When I add interfaces on the Fedora Core-4 system, they are addedd successfully in the routing table as routing entries, with all proper routing table column entries. But when I try to run that same portion of the code on Fedora Core-5, although the routes are added, but in the routing table they are marked as REJECT with an ( ! ) exclamation mark, under the flags column. It even does not show the gateway for that routing entry. 1) When does the system (I assume the kernel) mark a routing entry as REJECTed? 2) Does the route command use the same ioctl() function call? I have seen a few error messages with ioctl() command options returned. 3) Could there be a difference between the two impelmentations (usages) of the ioctl(), on Fedora Core 4 and 5 ? This is the last portion of my application, and I would be more than glad to get it solved. Thank you, Abid Ghufran.