document openvpn line length limit

diff --git a/src/practical_settings/vpn.tex b/src/practical_settings/vpn.tex
index a473c0a..18bb196 100644 (file)
--- a/src/practical_settings/vpn.tex
+++ b/src/practical_settings/vpn.tex
@@ -311,6 +311,9 @@ SHA256.
 
 \item[Limitations:] \mbox{}
 
+OpenVPN has a 256 character limit on configuration file line lengths;
+that limits then length of cipher suites.
+
 Note that the ciphersuites shown by \verb|openvpn --show-tls| are {\it
 known}, but not necessarily {\it
 supported} \footnote{\url{https://community.openvpn.net/openvpn/ticket/304}}.