diff --git a/scripts/dhcp-discover.nse b/scripts/dhcp-discover.nse
index 8a121be5d..fc5e4e360 100644
--- a/scripts/dhcp-discover.nse
+++ b/scripts/dhcp-discover.nse
@@ -57,7 +57,7 @@ author = "Ron Bowes"
 
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 
-categories = {"default", "discovery", "intrusive"}
+categories = {"discovery", "intrusive"}
 
 require 'bin'
 require 'bit'
diff --git a/scripts/dns-recursion.nse b/scripts/dns-recursion.nse
index fb1872895..4ae4af94f 100644
--- a/scripts/dns-recursion.nse
+++ b/scripts/dns-recursion.nse
@@ -14,7 +14,7 @@ author = "Felix Groebert"
 
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 
-categories = {"default", "intrusive"}
+categories = {"default", "safe"}
 
 require "bit"
 require "comm"
diff --git a/scripts/dns-zone-transfer.nse b/scripts/dns-zone-transfer.nse
index 12dde3579..62c2ebb2a 100644
--- a/scripts/dns-zone-transfer.nse
+++ b/scripts/dns-zone-transfer.nse
@@ -80,7 +80,7 @@ require('ipOps')
 
 author = "Eddie Bell"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
-categories = {'default', 'intrusive', 'discovery'}
+categories = {'intrusive', 'discovery'}
 
 -- DNS options
 local dns_opts = {}
diff --git a/scripts/ftp-bounce.nse b/scripts/ftp-bounce.nse
index 18ae38bf7..328faaa2e 100644
--- a/scripts/ftp-bounce.nse
+++ b/scripts/ftp-bounce.nse
@@ -23,7 +23,7 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 -- 21/tcp open  ftp
 -- |_ftp-bounce: no banner
 
-categories = {"default", "intrusive"}
+categories = {"default", "safe"}
 
 require "shortport"
 
diff --git a/scripts/http-open-proxy.nse b/scripts/http-open-proxy.nse
index cc66fef9b..42246fa5b 100644
--- a/scripts/http-open-proxy.nse
+++ b/scripts/http-open-proxy.nse
@@ -36,7 +36,7 @@ the target to retrieve a web page from www.google.com.
 
 author = "Arturo 'Buanzo' Busleiman"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
-categories = {"default", "discovery", "external", "intrusive"}
+categories = {"default", "discovery", "external", "safe"}
 require "comm"
 require "shortport"
 require "stdnse"
diff --git a/scripts/script.db b/scripts/script.db
index dd69af072..b4b3fddd6 100644
--- a/scripts/script.db
+++ b/scripts/script.db
@@ -24,17 +24,17 @@ Entry { filename = "daap-get-library.nse", categories = { "discovery", "safe", }
 Entry { filename = "daytime.nse", categories = { "discovery", "safe", } }
 Entry { filename = "db2-das-info.nse", categories = { "discovery", "safe", "version", } }
 Entry { filename = "db2-discover.nse", categories = { "broadcast", "safe", } }
-Entry { filename = "dhcp-discover.nse", categories = { "default", "discovery", "intrusive", } }
+Entry { filename = "dhcp-discover.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "dns-brute.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "dns-cache-snoop.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "dns-fuzz.nse", categories = { "fuzzer", "intrusive", } }
 Entry { filename = "dns-nsec-enum.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "dns-random-srcport.nse", categories = { "external", "intrusive", } }
 Entry { filename = "dns-random-txid.nse", categories = { "external", "intrusive", } }
-Entry { filename = "dns-recursion.nse", categories = { "default", "intrusive", } }
+Entry { filename = "dns-recursion.nse", categories = { "default", "safe", } }
 Entry { filename = "dns-service-discovery.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "dns-update.nse", categories = { "discovery", "safe", } }
-Entry { filename = "dns-zone-transfer.nse", categories = { "default", "discovery", "intrusive", } }
+Entry { filename = "dns-zone-transfer.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "domcon-brute.nse", categories = { "auth", "intrusive", } }
 Entry { filename = "domcon-cmd.nse", categories = { "auth", "intrusive", } }
 Entry { filename = "domino-enum-users.nse", categories = { "auth", "intrusive", } }
@@ -45,7 +45,7 @@ Entry { filename = "epmd-info.nse", categories = { "default", "discovery", "safe
 Entry { filename = "finger.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "firewalk.nse", categories = { "discovery", "safe", } }
 Entry { filename = "ftp-anon.nse", categories = { "auth", "default", "safe", } }
-Entry { filename = "ftp-bounce.nse", categories = { "default", "intrusive", } }
+Entry { filename = "ftp-bounce.nse", categories = { "default", "safe", } }
 Entry { filename = "ftp-brute.nse", categories = { "auth", "intrusive", } }
 Entry { filename = "ftp-libopie.nse", categories = { "intrusive", "vuln", } }
 Entry { filename = "ftp-proftpd-backdoor.nse", categories = { "discovery", "intrusive", } }
@@ -65,7 +65,7 @@ Entry { filename = "http-headers.nse", categories = { "discovery", "safe", } }
 Entry { filename = "http-iis-webdav-vuln.nse", categories = { "intrusive", "vuln", } }
 Entry { filename = "http-malware-host.nse", categories = { "malware", "safe", } }
 Entry { filename = "http-methods.nse", categories = { "default", "safe", } }
-Entry { filename = "http-open-proxy.nse", categories = { "default", "discovery", "external", "intrusive", } }
+Entry { filename = "http-open-proxy.nse", categories = { "default", "discovery", "external", "safe", } }
 Entry { filename = "http-passwd.nse", categories = { "intrusive", "vuln", } }
 Entry { filename = "http-php-version.nse", categories = { "discovery", "safe", } }
 Entry { filename = "http-robots.txt.nse", categories = { "default", "discovery", "safe", } }
@@ -171,7 +171,7 @@ Entry { filename = "snmp-win32-services.nse", categories = { "default", "discove
 Entry { filename = "snmp-win32-shares.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "snmp-win32-software.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "snmp-win32-users.nse", categories = { "default", "discovery", "safe", } }
-Entry { filename = "socks-open-proxy.nse", categories = { "default", "discovery", "external", "intrusive", } }
+Entry { filename = "socks-open-proxy.nse", categories = { "default", "discovery", "external", "safe", } }
 Entry { filename = "sql-injection.nse", categories = { "intrusive", "vuln", } }
 Entry { filename = "ssh-hostkey.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "ssh2-enum-algos.nse", categories = { "discovery", "safe", } }
diff --git a/scripts/socks-open-proxy.nse b/scripts/socks-open-proxy.nse
index 9842c1871..f720ce1e4 100644
--- a/scripts/socks-open-proxy.nse
+++ b/scripts/socks-open-proxy.nse
@@ -24,7 +24,7 @@ argument.
 
 author = "Joao Correa"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
-categories = {"default", "discovery", "external", "intrusive"}
+categories = {"default", "discovery", "external", "safe"}
 
 require "shortport"
 require "stdnse"