diff --git a/core/filters/base.rb b/core/filters/base.rb
index 9bf65df52..0a28968e2 100644
--- a/core/filters/base.rb
+++ b/core/filters/base.rb
@@ -142,6 +142,15 @@ module Filters
     valid
   end
 
+  # Checks if the given string is a valid TCP port
+  # @param [String] port string for testing
+  # @return [Boolean] true if the string is a valid TCP port, otherwise false
+  def self.is_valid_port?(port)
+    valid = false
+    valid = true if port.to_i > 0 && port.to_i < 2**16
+    valid
+  end
+
   # Checks if string is a valid domain name
   # @param [String] domain string for testing
   # @return [Boolean] If the string is a valid domain name
diff --git a/extensions/network/models/network_service.rb b/extensions/network/models/network_service.rb
index 724c4e5f7..733a2c4c7 100644
--- a/extensions/network/models/network_service.rb
+++ b/extensions/network/models/network_service.rb
@@ -29,6 +29,7 @@ module BeEF
         def self.add(service={})
           (print_error "Invalid hooked browser session"; return) if not BeEF::Filters.is_valid_hook_session_id?(service[:hooked_browser_id])
           (print_error "Invalid IP address"; return) if not BeEF::Filters.is_valid_ip?(service[:ip])
+          (print_error "Invalid port"; return) if not BeEF::Filters.is_valid_port?(service[:port])
 
           # store the returned network host details
           BeEF::Core::Models::NetworkHost.add(