jfj writes: > My question now is, if it is possible to attack this by > sending data directly to the PPP layer. Can one open > /dev/ppp, construct a UDP packet, encapsulate this into > a PPP packet, write it to some /dev/ppp device and reach > some internet host? 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. (Note that you wouldn't want to "encapsulate" it as PPP. That's what the PPP driver itself does. If you were to open /dev/ppp for such a hack, you'd transmit raw IP packets, much in the same way you would if you opened an Ethernet driver.) -- James Carlson 42.703N 71.076W <carlsonj@xxxxxxxxxxxxxxx> - 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
