As discussed in https://gitlab.com/openconnect/openconnect/-/issues/254#note_661398964
Signed-off-by: Daniel Lenski <dlenski@gmail.com>
<h2>Connectivity</h2>
<p>Once authentication is complete, the VPN connection can be
-established. Both Legacy IP and IPv6 should be working.</p>
+established. Both Legacy IP and IPv6 should be working. However, some
+Pulse VPNs will not provide full IPv6 connectivity unless a recent
+version of the official Pulse client for Windows is spoofed (see
+<a href="https://gitlab.com/openconnect/openconnect/-/issues/254#note_661398964">comment
+on GitLab issue #254</a>. For example:</p>
+
+<pre>
+ ./openconnect --protocol=pulse --useragent "Pulse-Secure/9.1.11.6725" --os=win
+</pre>
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