Re: ISDN security ???

[David Woodhouse]

Can anyone clarify the last paragraph?

--- index.html.orig	Fri Feb  1 09:51:46 2002
+++ index.html	Fri Feb  1 10:11:43 2002
@@ -1073,6 +1073,10 @@
 <A HREF="#s8-9">Why do I get unresolved symbols with __bad_ in the name?</A>
 </LI>
 
+<LI>
+<A HREF="#s8-10">Why do I get warnings about md5sum checks failing in the ISDN code?</A>
+</LI>
+
 </OL>
 
 <H4>
@@ -5182,6 +5186,34 @@
 </LI>
 
 </UL>
+</LI>
+
+<LI>
+<A NAME="s8-10"></A><B>Why do I get warnings about md5sum checks failing in the ISDN code?</B>
+<UL>
+
+<LI>
+<FONT COLOR="#0000FF">(DW)</FONT> These are harmless, and you can
+probably ignore them.
+<BR>
+In many countries, any equipment which is connected to the public 
+telephone networks must be tested and approved to ensure it behaves
+correctly. This requirement also extends to the software used to 
+implement the ISDN protocols with passive ISDN cards.
+<BR>
+The HiSax driver has passed these tests and been approved, but any
+modifications to the source mean that the approval process must be
+repeated. The md5sum checks are therefore present to indicate the 
+current approval status of the HiSax driver. An md5sum failure does
+not mean that your kernel download is corrupted; merely that someone
+has changed the source code since the last time it was certified and
+the md5sums of the approved files updated. 
+<BR>
+It's rumoured that the requirement for certification of ISDN software
+is being relaxed in many countries, so this approval process is
+unnecessary. You should check for yourself the status of such rules in
+your country. Certainly, I've never heard of anyone actually getting 
+prosecuted or otherwise reprimanded for using a modified Linux ISDN stack. 
 </LI>
 
 </OL>

--
dwmw2