James Carlson wrote:
No more or less so than it's possible to do the same via an Ethernet adapter.
> /dev/ppp provides a datalink layer interface to the system. The > security on such interfaces (in general) ought to be the same. So it is possible to dump UDP packets to /dev/ppp (and /dev/eth (and PPP packets to /dev/tty)). More or less... If I understand correctly, the only program that is supposed to use /dev/ppp is pppd, to establish the connection. After that the packets go there through the internal TCP/IP stack. And noone else should be messing with /dev/ppp normally. If so, does it sound like a feasible idea to hack the kernel to forbid opening the /dev/ppp device to other processes, once pppd is working? Another idea is to rename /dev/ppp to /dev/secretppp and hack pppd to use that instead? Other ideas to lock access to /dev/ppp? Thanks, jerald - To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
