diff --git a/certs.sh b/certs.sh
new file mode 100755
index 0000000..b8a994b
--- /dev/null
+++ b/certs.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+IP=$(echo $1 | egrep -o "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$")
+
+if [ ! $IP ]
+then
+    echo "Usage: generate-ip-cert.sh 127.0.0.1"
+    exit 1
+fi
+
+echo "[req]
+default_bits  = 2048
+distinguished_name = req_distinguished_name
+req_extensions = req_ext
+x509_extensions = v3_req
+prompt = no
+[req_distinguished_name]
+countryName = XX
+stateOrProvinceName = N/A
+localityName = N/A
+organizationName = Self-signed certificate
+commonName = $IP: Self-signed certificate
+[req_ext]
+subjectAltName = @alt_names
+[v3_req]
+subjectAltName = @alt_names
+[alt_names]
+IP.1 = $IP
+" > san.cnf
+
+openssl req -x509 -nodes -days 730 -newkey rsa:2048 -keyout key.pem -out cert.pem -config san.cnf
+rm san.cnf
+
+
+#MIT License
+#
+#Copyright (c) 2020 Antelle
+#
+#Permission is hereby granted, free of charge, to any person obtaining a copy
+#of this software and associated documentation files (the "Software"), to deal
+#in the Software without restriction, including without limitation the rights
+#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#copies of the Software, and to permit persons to whom the Software is
+#furnished to do so, subject to the following conditions:
+#
+#The above copyright notice and this permission notice shall be included in all
+#copies or substantial portions of the Software.
+#
+#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+#SOFTWARE.
\ No newline at end of file