Re: ISDN security ???

David Woodhouse (dwmw2@infradead.org)
Fri, 01 Feb 2002 10:15:56 +0000


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

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