diff --git a/Netdisco/lib/App/Netdisco/Web/Plugin/Device/Ports.pm b/Netdisco/lib/App/Netdisco/Web/Plugin/Device/Ports.pm
index 6940b8f4..0f0f04f1 100644
--- a/Netdisco/lib/App/Netdisco/Web/Plugin/Device/Ports.pm
+++ b/Netdisco/lib/App/Netdisco/Web/Plugin/Device/Ports.pm
@@ -36,10 +36,15 @@ ajax '/ajax/content/device/ports' => require_login sub {
                 $f =~ s/\*/%/g;
                 $f =~ s/\?/_/g;
                 # set wilcards at param boundaries
-                $f =~ s/^\%*/%/;
-                $f =~ s/\%*$/%/;
+                if ($f !~ m/[%_]/) {
+                    $f =~ s/^\%*/%/;
+                    $f =~ s/\%*$/%/;
+                }
                 # enable ILIKE op
-                $f = { '-ilike' => $f };
+                $f = { (param('invert') ? '-not_ilike' : '-ilike') => $f };
+            }
+            elsif (param('invert')) {
+                $f = { '!=' => $f };
             }
 
             if ($set->search({'me.port' => $f})->count) {
diff --git a/Netdisco/share/public/css/netdisco.css b/Netdisco/share/public/css/netdisco.css
index 97c034ac..922fb7c2 100644
--- a/Netdisco/share/public/css/netdisco.css
+++ b/Netdisco/share/public/css/netdisco.css
@@ -406,8 +406,8 @@ td > form.nd_inline-form {
 
 /* fixup for prepended partial port name checkbox in sidebar */
 .nd_port-partial-checkbox {
-  width: 136px;
-  padding: 0px 0px 0px 11px !important;
+  width: 84px;
+  padding: 0px 0px 0px 5px !important;
   cursor: pointer;
 }
 
@@ -421,6 +421,27 @@ td > form.nd_inline-form {
   margin-bottom: 5px !important;
 }
 
+/* fixup for prepended invert port name checkbox in sidebar */
+.nd_port-invert-checkbox {
+  width: 30px;
+  padding: 0px 0px 0px 5px !important;
+  cursor: pointer;
+}
+
+.nd_port-invert-label {
+  padding: 0px !important;
+  /* for some reason only .add-on:first-child gets these */
+  -webkit-border-radius: 4px 0 0 4px !important;
+  -moz-border-radius: 4px 0 0 4px !important;
+  border-radius: 4px 0 0 4px !important;
+}
+
+.nd_port-invert {
+  margin-left: 5px !important;
+  margin-top: -5px;
+  margin-bottom: 5px !important;
+}
+
 /* fixup for prepended checkbox in sidebar */
 .nd_sidebar .input-prepend {
   margin-left: -2px;
diff --git a/Netdisco/share/views/js/common.js b/Netdisco/share/views/js/common.js
index d673dfe2..6385df6d 100644
--- a/Netdisco/share/views/js/common.js
+++ b/Netdisco/share/views/js/common.js
@@ -93,7 +93,9 @@
 
       // form reset icon on ports tab
       $('#nd_sidebar-reset-link').attr('href', '/device?tab=ports&reset=on&' +
-        $('#ports_form').find('input[name="q"],input[name="f"],input[name="partial"]').serialize())
+        $('#ports_form')
+          .find('input[name="q"],input[name="f"],input[name="partial"],input[name="invert"]')
+          .serialize())
       [% END %]
 
       do_search(event, '[% tab.tag %]');
diff --git a/Netdisco/share/views/sidebar/device/ports.tt b/Netdisco/share/views/sidebar/device/ports.tt
index 84c0c003..8c9e366b 100644
--- a/Netdisco/share/views/sidebar/device/ports.tt
+++ b/Netdisco/share/views/sidebar/device/ports.tt
@@ -15,6 +15,13 @@
                 <label class="nd_checkboxlabel" for="partial">
                   <span class="nd_port-partial-checkbox uneditable-input">Partial Match</span>
                 </label>
+                <label class="add-on nd_port-invert-label">
+                  <input type="checkbox" id="invert"
+                    name="invert"[% ' checked="checked"' IF params.invert %]/>
+                </label>
+                <label class="nd_checkboxlabel" for="invert">
+                  <span class="nd_port-invert-checkbox uneditable-input">Not</span>
+                </label>
               </div>
             </div>
             <div class="clearfix">