peer may send protocol-reject messages to you, resulting in the above
message (since your pppd doesn't recognize the protocol number
either.)
+
+
+------------------------------------------------------------------------
+
+Q: I get a message saying something like "ioctl(TIOCSETD): Operation
+not permitted". How do I fix this?
+
+A: This is because pppd is not running as root. If you have not
+installed pppd setuid-root, you will have to be root to run it. If
+you have installed pppd setuid-root and you still get this message, it
+is probably because your shell is using some other copy of pppd than
+the installed one - for example, if you are in the pppd directory
+where you've just built pppd and your $PATH has . before /usr/sbin (or
+wherever pppd gets installed).
+
+
+------------------------------------------------------------------------
+
+Q: Has your package been ported to HP/UX or IRIX or AIX?
+
+A: No. I don't have access to systems running HP/UX or AIX. No-one
+has volunteered to port it to HP/UX. I had someone who did a port for
+AIX 4.x, but who is no longer able to maintain it. And apparently AIX
+3.x is quite different, so it would need a separate port.
+
+IRIX includes a good PPP implementation in the standard distribution,
+as far as I know.