Index: head/usr.sbin/ppp/ppp.8
===================================================================
--- head/usr.sbin/ppp/ppp.8
+++ head/usr.sbin/ppp/ppp.8
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 25, 2009
+.Dd March 25, 2017
 .Dt PPP 8
 .Os
 .Sh NAME
@@ -265,7 +265,7 @@
 .It Supports client callback.
 .Nm
 can use either the standard LCP callback protocol or the Microsoft
-CallBack Control Protocol (ftp://ftp.microsoft.com/developr/rfc/cbcp.txt).
+CallBack Control Protocol (https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-CBCP/[MS-CBCP].pdf).
 .It Supports NAT or packet aliasing.
 Packet aliasing (a.k.a.\& IP masquerading) allows computers on a
 private, unregistered network to access the Internet.
@@ -3523,7 +3523,7 @@
 This command tells
 .Nm
 to punch holes in the firewall for FTP or IRC DCC connections.
-This is done dynamically by installing termporary firewall rules which
+This is done dynamically by installing temporary firewall rules which
 allow a particular connection (and only that connection) to go through
 the firewall.
 The rules are removed once the corresponding connection terminates.
@@ -5555,7 +5555,7 @@
 .It set rad_port_id Ar option
 When RADIUS is configured, setting the
 .Dq rad_port_id
-value allows to specify what should be sent to the RADIUS server as
+value specifies what should be sent to the RADIUS server as
 NAS-Port-Id.
 The
 .Ar option Ns No s