# Tutorial, create selfsigned certificates for the IRC5 OPC UA server **URL:** \ **Category:** Developer Tools\ **Tags:** openssl, opc\ **Created:** [September 16, 2020, 10:13pm UTC](https://tech-community.robotics.abb.com/t/tutorial-create-selfsigned-certificates-for-the-irc5-opc-ua-server/9704 "2020-09-16T22:13:28Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![dnilsson](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/dnilsson/32/795_2.png) [@dnilsson](https://tech-community.robotics.abb.com/u/dnilsson)\ **Post date:** [September 16, 2020, 10:13pm UTC](https://tech-community.robotics.abb.com/t/tutorial-create-selfsigned-certificates-for-the-irc5-opc-ua-server/9704/1 "2020-09-16T22:13:28Z")
The certificate generated with the procedure in this video is likely to work with other OPC UA Servers as well. The openSSL commands used in the video: - genrsa -out YourPath\key.pem 2048 - req -x509 -days 365 -new -out YourPath\cert.pem -key YourPath\key.pem -config YourPath\cert.conf - x509 -outform der -in YourPath\cert.pem -out YourPath\tutorial.der Link to download OpenSSL: [OpenSSL download | SourceForge.net](https://sourceforge.net/projects/openssl/) Link to IRC5 OPC UA Server: [https://developercenter.robotstudio.com/](https://developercenter.robotstudio.com/) The Config file: [req] default\_bits = 2048 default\_md = sha256 distinguished\_name = subject req\_extensions = req\_ext x509\_extensions = req\_ext string\_mask = utf8only prompt = no [req\_ext] basicConstraints = CA:FALSE nsCertType = client, server keyUsage = nonRepudiation, digitalSignature, keyEncipherment, dataEncipherment, keyCertSign extendedKeyUsage= serverAuth, clientAuth nsComment = “OpenSSL Tutorial for IRC5 OPC-UA” subjectKeyIdentifier=hash authorityKeyIdentifier=keyid,issuer subjectAltName = URI:urn:opcua:python:client,IP: 127.0.0.1 [subject] countryName = SE stateOrProvinceName = VG localityName = VG organizationName = ABB commonName = PythonOpcUaClient