[docs] formatting

1 files changed, 26 insertions, 14 deletions

diff --git a/docs/sip-howto.md b/docs/sip-howto.md
index 4022e2d..ae27c14 100644
--- a/docs/sip-howto.md
+++ b/docs/sip-howto.md
@@ -7,35 +7,47 @@ stunnel configuration
 SIP2 has no encryption built-in. To encrypt traffic, we install stunnel both on
 the server (the one with the koha instance) and the client (the vpnweb node):
 
-  sudo apt-get install stunnel4
+```
+sudo apt-get install stunnel4
+```
 
 Set value to ENABLED in the config file:
 
-  /etc/default/stunnel4
+```
+/etc/default/stunnel4
+```
 
 Configure the server, see `docs/examples/stunnel.conf-server-sample`:
 
-  [sip2]
-  accept  = 6443
-  connect = 6001
-  cert    = /etc/stunnel/ssl/sip2-cert.pem
-  key     = /etc/stunnel/ssl/sip2-key.pem
+```
+[sip2]
+accept  = 6443
+connect = 6001
+cert    = /etc/stunnel/ssl/sip2-cert.pem
+key     = /etc/stunnel/ssl/sip2-key.pem
+```
 
 You will need to generate a certificate pair for this service. For a throwaway test deployment,
 you can look in the `test/simple-ca` folder.
 
 Now configure the client side (the box where the vpnweb instance is running). Create /etc/stunnel/sip.conf:
 
-  [sip2]
-  accept  = localhost:6001
-  connect = koha.example.org:6443
-  client  = yes
+```
+[sip2]
+accept  = localhost:6001
+connect = koha.example.org:6443
+client  = yes
+```
 
 Now you can start the service:
 
-  sudo /etc/init.d/stunnel4 start
+```
+sudo /etc/init.d/stunnel4 start
+```
 
 And configure vpnweb to connect to the local port:
 
-  export VPNWEB_SIP_HOST=localhost
-  export VPNWEB_SIP_PORT=6001  
+```
+export VPNWEB_SIP_HOST=localhost
+export VPNWEB_SIP_PORT=6001  
+```