diff --git a/callback.php b/callback.php
index aaf56f089..939ec9383 100644
--- a/callback.php
+++ b/callback.php
@@ -16,7 +16,7 @@ $enabled = dbFetchCell("SELECT `value` FROM `callback` WHERE `name` = 'enabled'"
 if ($enabled == 1) {
 
     if (dbFetchCell("SELECT `value` FROM `callback` WHERE `name` = 'uuid'") == '') {
-        dbInsert(array('name'=>'uuid','value'=>uniqid()),'callback');
+        dbInsert(array('name'=>'uuid','value'=>guidv4()),'callback');
     }
     $uuid = dbFetchCell("SELECT `value` FROM `callback` WHERE `name` = 'uuid'");
 
diff --git a/doc/Installation/Installation-(Debian-Ubuntu).md b/doc/Installation/Installation-(Debian-Ubuntu).md
index e05bd87d7..5810b271e 100644
--- a/doc/Installation/Installation-(Debian-Ubuntu).md
+++ b/doc/Installation/Installation-(Debian-Ubuntu).md
@@ -42,7 +42,7 @@ This host is where the web server and SNMP poller run.  It could be the same mac
 
 Install the required software:
 
-    apt-get install libapache2-mod-php5 php5-cli php5-mysql php5-gd php5-snmp php5-pear php5-curl snmp graphviz php5-mcrypt php5-json apache2 fping imagemagick whois mtr-tiny nmap python-mysqldb snmpd mysql-client php-net-ipv4 php-net-ipv6 rrdtool git
+    apt-get install libapache2-mod-php5 php5-cli php5-mysql php5-gd php5-snmp php-pear php5-curl snmp graphviz php5-mcrypt php5-json apache2 fping imagemagick whois mtr-tiny nmap python-mysqldb snmpd mysql-client php-net-ipv4 php-net-ipv6 rrdtool git
 
 The packages listed above are an all-inclusive list of packages that were necessary on a clean install of Ubuntu 12.04/14.04.
 
diff --git a/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md b/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md
index fb338cb2e..a39f6d43b 100644
--- a/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md
+++ b/doc/Installation/Installation-Lighttpd-(Debian-Ubuntu).md
@@ -37,7 +37,7 @@ Change `127.0.0.1` to the IP address that your MySQL server should listen on.  R
 
 Install necessary software.  The packages listed below are an all-inclusive list of packages that were necessary on a clean install of Debian 7.
 
-    apt-get install lighttpd php5-cli php5-mysql php5-gd php5-snmp php5-cgi php5-pear php5-curl snmp graphviz mysql-server mysql-client rrdtool sendmail fping imagemagick whois mtr-tiny nmap ipmitool php5-mcrypt php5-json python-mysqldb snmpd php-net-ipv4 php-net-ipv6 rrdtool git
+    apt-get install lighttpd php5-cli php5-mysql php5-gd php5-snmp php5-cgi php-pear php5-curl snmp graphviz mysql-server mysql-client rrdtool sendmail fping imagemagick whois mtr-tiny nmap ipmitool php5-mcrypt php5-json python-mysqldb snmpd php-net-ipv4 php-net-ipv6 rrdtool git
 
 ### Cloning ###
 
diff --git a/includes/defaults.inc.php b/includes/defaults.inc.php
index ed0b2569a..7cee0e712 100644
--- a/includes/defaults.inc.php
+++ b/includes/defaults.inc.php
@@ -600,7 +600,7 @@ $config['distributed_poller_memcached_host']             = 'example.net';
 $config['distributed_poller_memcached_port']             = '11211';
 
 // Stats callback system
-$config['callback_post']                                 = 'http://lathwood.co.uk/log/log.php';
-$config['callback_clear']                                = 'http://lathwood.co.uk/log/clear.php';
+$config['callback_post']                                 = 'https://stats.librenms.org/log.php';
+$config['callback_clear']                                = 'https://stats.librenms.org/clear.php';
 
 ?>
diff --git a/includes/functions.php b/includes/functions.php
index e3905e311..5865dc3a7 100755
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -1129,4 +1129,15 @@ function convert_delay($delay) {
     return($delay_sec);
 }
 
+function guidv4($data) {
+    // http://stackoverflow.com/questions/2040240/php-function-to-generate-v4-uuid#15875555
+    // From: Jack http://stackoverflow.com/users/1338292/ja%CD%A2ck
+    assert(strlen($data) == 16);
+
+    $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
+    $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10
+
+    return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
+}
+
 ?>