Describe DNS1 and DNS2 environment variables.

[ppp.git] / pppd / pppd.8

diff --git a/pppd/pppd.8 b/pppd/pppd.8
index ecf01daf15657b6a090a3d9612ce93d15d9c98e6..bbe43a1c456a4874f0e6b8781cc46782fa680e87 100644 (file)
--- a/pppd/pppd.8
+++ b/pppd/pppd.8
@@ -1,5 +1,5 @@
 .\" manual page [] for pppd 2.4
-.\" $Id: pppd.8,v 1.73 2003/06/29 10:04:50 paulus Exp $
+.\" $Id: pppd.8,v 1.76 2004/01/15 05:09:00 paulus Exp $
 .\" SH section heading
 .\" SS subsection heading
 .\" LP paragraph
@@ -215,8 +215,11 @@ except that qualifiers which are inappropriate for a PPP link, such as
 \fBether\fR and \fBarp\fR, are not permitted.  Generally the filter
 expression should be enclosed in single-quotes to prevent whitespace
 in the expression from being interpreted by the shell. This option
-is currently only available under NetBSD or Linux, and then only
-if both the kernel and pppd were compiled with PPP_FILTER defined.
+is currently only available under Linux, and requires that the kernel
+was configured to include PPP filtering support (CONFIG_PPP_FILTER).
+Note that it
+is possible to apply different constraints to incoming and outgoing
+packets using the \fBinbound\fR and \fBoutbound\fR qualifiers.
 .TP
 .B allow-ip \fIaddress(es)
 Allow peers to use the given IP address or subnet without
@@ -831,7 +834,7 @@ Specifies a packet filter to applied to data packets being sent or
 received to determine which packets should be allowed to pass.
 Packets which are rejected by the filter are silently discarded.  This
 option can be used to prevent specific network daemons (such as
-routed) using up link bandwidth, or to provide a basic firewall
+routed) using up link bandwidth, or to provide a very basic firewall
 capability.
 The \fIfilter-expression\fR syntax is as described for tcpdump(1),
 except that qualifiers which are inappropriate for a PPP link, such as
@@ -840,8 +843,8 @@ expression should be enclosed in single-quotes to prevent whitespace
 in the expression from being interpreted by the shell.  Note that it
 is possible to apply different constraints to incoming and outgoing
 packets using the \fBinbound\fR and \fBoutbound\fR qualifiers. This
-option is currently only available under NetBSD or Linux, and then
-only if both the kernel and pppd were compiled with PPP_FILTER defined.
+option is currently only available under Linux, and requires that the
+kernel was configured to include PPP filtering support (CONFIG_PPP_FILTER).
 .TP
 .B password \fIpassword-string
 Specifies the password to use for authenticating to the peer.  Use
@@ -1553,6 +1556,14 @@ the connection.
 .TP
 .B LINKNAME
 The logical name of the link, set with the \fIlinkname\fR option.
+.TP
+.B DNS1
+If the peer supplies DNS server addresses, this variable is set to the
+first DNS server address supplied.
+.TP
+.B DNS2
+If the peer supplies DNS server addresses, this variable is set to the
+second DNS server address supplied.
 .P
 Pppd invokes the following scripts, if they exist.  It is not an error
 if they don't exist.