From a902cf250c27fc3ac97cfadf5e60715605bbbffa Mon Sep 17 00:00:00 2001
From: pbldp <>
Date: Wed, 23 Jan 2002 19:43:26 +0000
Subject: [PATCH] Minor enhancements Modified Files:  	Linux+IPv6-HOWTO.lyx

---
 .../Peter-Bieringer/Linux+IPv6-HOWTO.lyx      | 138 +++++++++++++++++-
 1 file changed, 137 insertions(+), 1 deletion(-)

diff --git a/LDP/users/Peter-Bieringer/Linux+IPv6-HOWTO.lyx b/LDP/users/Peter-Bieringer/Linux+IPv6-HOWTO.lyx
index 6039eb53..91085dbf 100644
--- a/LDP/users/Peter-Bieringer/Linux+IPv6-HOWTO.lyx
+++ b/LDP/users/Peter-Bieringer/Linux+IPv6-HOWTO.lyx
@@ -49,7 +49,7 @@ on>
 <revhistory> 
 \layout SGML
 
-<revision> <revnumber>Release 0.18.1</revnumber> <date>2002-01-22</date> <authorin
+<revision> <revnumber>Release 0.18.2</revnumber> <date>2002-01-23</date> <authorin
 itials>PB</authorinitials> <revremark>See  
 \begin_inset LatexCommand \ref[revision history]{revision-history}
 
@@ -2217,6 +2217,11 @@ After you've prepared your system for IPv6, you sure want to use IPv6 now
  help you very fast.
 \layout Subsection
 
+
+\begin_inset LatexCommand \label{program-ping6}
+
+\end_inset 
+
 IPv6 ping
 \layout Standard
 
@@ -2780,6 +2785,134 @@ In this part of this HOWTO, more client specific issues are mentioned.
 \end_inset 
 
 .
+\layout Section
+
+FAQ (IPv6-ready system check)
+\layout Subsection
+
+Using tools
+\layout Subsubsection
+
+Q: Cannot ping6 to link-local addresses
+\layout Standard
+
+Error message: "
+\emph on 
+connect: Invalid argument
+\emph default 
+"
+\layout Standard
+
+Kernel doesn't know, which physical or virtual link you want to use to send
+ such ICMPv6 packets.
+ Therefore it displays this error message.
+\layout Standard
+
+Solution: Specify interface like: 
+\begin_inset Quotes sld
+\end_inset 
+
+ping6 
+\series bold 
+-I eth0
+\series default 
+ fe80::2e0:18ff:fe90:9205
+\begin_inset Quotes srd
+\end_inset 
+
+, see also 
+\begin_inset LatexCommand \ref[program ping6 usage]{program-ping6}
+
+\end_inset 
+
+.
+\layout Subsubsection
+
+Q: Cannot ping6 or traceroute6 as normal user
+\layout Standard
+
+Error message: 
+\begin_inset Quotes sld
+\end_inset 
+
+
+\emph on 
+icmp socket: Operation not permitted
+\emph default 
+
+\begin_inset Quotes srd
+\end_inset 
+
+
+\layout Standard
+
+This utilities create special ICMPv6 packets and send them out.
+ This is done by using raw sockets in the kernel.
+ But raw sockets can only be used by the 
+\begin_inset Quotes sld
+\end_inset 
+
+root
+\begin_inset Quotes srd
+\end_inset 
+
+ user.
+ Therefore normal users get such error message.
+\layout Standard
+
+Solution: If it's really needed that all users should be able to use this
+ utilites, you can add the 
+\begin_inset Quotes sld
+\end_inset 
+
+suid
+\begin_inset Quotes srd
+\end_inset 
+
+ bit using 
+\begin_inset Quotes srd
+\end_inset 
+
+chmod u+s /path/to/program
+\begin_inset Quotes srd
+\end_inset 
+
+, see also 
+\begin_inset LatexCommand \ref[program ping6 usage]{program-ping6}
+
+\end_inset 
+
+.
+ If not all users should be able to, you can change the group of the program
+ to e.g.
+ 
+\begin_inset Quotes sld
+\end_inset 
+
+wheel
+\begin_inset Quotes srd
+\end_inset 
+
+, add this power users to this group and remove the execution bit for other
+ users using 
+\begin_inset Quotes sld
+\end_inset 
+
+chmod o-rwx /path/to/program
+\begin_inset Quotes srd
+\end_inset 
+
+.
+ Or configure 
+\begin_inset Quotes sld
+\end_inset 
+
+sudo
+\begin_inset Quotes srd
+\end_inset 
+
+ for fullfilling your security policy.
+ 
 \layout Chapter
 
 
@@ -7949,6 +8082,9 @@ Revision history
 Releases 0.x
 \layout Description
 
+0.18.2 2002-01-23/PB: Add a FAQ on the program chapter
+\layout Description
+
 0.18.1 2002-01-23/PB: Move 
 \begin_inset Quotes sld
 \end_inset