diff --git a/bin/fiwi b/bin/fiwi
new file mode 100755
index 0000000..51cd178
--- /dev/null
+++ b/bin/fiwi
@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+from sys import argv
+from sys import stderr
+from sys import exit
+from os import path
+import nftables
+
+NFT = nftables.Nftables()
+FILTER_TABLE = "inet filter"
+try:
+    NAME = path.basename(argv.pop(0))
+except IndexError:
+    pass
+
+def error(message, exit_code):
+    print("%s: %s" % (NAME, message), file = stderr)
+    exit(exit_code)
+
+def alter_set(operation, protocol, port):
+    NFT.cmd("%s element %s allowed_%s { %s }" % (operation, FILTER_TABLE, protocol, port))
+
+def public_allow(argv):
+    try:
+        protocol = argv.pop(0)
+    except IndexError:
+        error("no protocol supplied", 1)
+
+    try:
+        port = argv.pop(0)
+    except IndexError:
+        error("no port supplied", 1)
+
+    alter_set('add', protocol, port)
+
+def public_deny(argv):
+    try:
+        protocol = argv.pop(0)
+    except IndexError:
+        error("no protocol supplied", 1)
+
+    try:
+        port = argv.pop(0)
+    except IndexError:
+        error("no port supplied", 1)
+
+    alter_set('delete', protocol, port)
+
+if __name__ == '__main__':
+    try:
+        arg = argv.pop(0)
+    except IndexError:
+        error("No command supplied", 1)
+
+    try:
+        command = globals()["public_%s" % (arg)]
+    except KeyError:
+        error('invalid command "%s"' % (arg), 2)
+
+    command(argv)