George, i have the same problem .. > ppp_mppe.c:66: rc4.h: No such file or directory > ppp_mppe.c:67: rc4_enc.c: No such file or directory The solution is: [arf]$ cd ppp-2.3.8 [arf]$ cp linux/rc4.* /usr/src/linux/drivers/net/ and make modules SUBDIRS=drivers/net again ;) CarloX