diff --git a/site.conf b/site.conf
index c4f81621a3feb14655d4b96d3ff64aa140bb38b0..eb0262738043dbbfb284b7c2f9f45fa681b7c06b 100644
--- a/site.conf
+++ b/site.conf
@@ -1,9 +1,9 @@
 {
-        hostname_prefix = 's',
+        hostname_prefix = 'ffs',
         site_name = 'Freifunk Stuttgart',
         site_code = 'ffs',
 
-        prefix4 = '172.21.24.128/25',
+        prefix4 = '172.21.0.0/18',
         prefix6 = 'fd21:b4dc:4b1e::/64',
 
         timezone = 'CET-1CEST,M3.5.0,M10.5.0/3', -- Europe/Berlin
@@ -58,7 +58,7 @@
                                 name = 'stable',
                                 mirrors = {
                                         'http://[fd21:b4dc:4b1e::a38:1]/gluon/stable/sysupgrade', -- gluongw
-                                        'http://172.21.24.129/gluon/stable/sysupgrade',  -- gluongw
+                                        'http://178.62.238.90/gluon/stable/sysupgrade',  -- gluongw
                                 },
                                 good_signatures = 1,
                                 pubkeys = {
@@ -69,7 +69,7 @@
                                 name = 'beta',
                                 mirrors = {
                                         'http://[fd21:b4dc:4b1e::a38:1]/gluon/beta/sysupgrade', -- gluongw
-                                        'http://172.21.24.129/gluon/beta/sysupgrade',  -- gluongw
+                                        'http://178.62.238.90/gluon/beta/sysupgrade',  -- gluongw
                                 },
                                 good_signatures = 1,
                                 pubkeys = {
@@ -80,7 +80,7 @@
                                 name = 'nightly',
                                 mirrors = {
                                         'http://[fd21:b4dc:4b1e::a38:1]/gluon/nightly/sysupgrade', -- gluongw
-                                        'http://172.21.24.129/gluon/nightly/sysupgrade',  -- gluongw
+                                        'http://178.62.238.90/gluon/nightly/sysupgrade',  -- gluongw
                                 },
                                 good_signatures = 1,
                                 pubkeys = {