• Short tip: NetworkManager, 802.1x and SELinux

    calendar Oct 5, 2023 · 2 min read · kurztipp selinux  ·
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    IEEE 802.1X is a standard for authentication and authorisation of devices in networks. Thus, physical LAN ports, VLANs or WLANs can only connect to the network after successful authentication, for example via RADIUS. Communication can be encrypted via TLS or PPP-EAP-TLS, for example. If this network configuration is to …


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  • CentOS 7.4, Spacewalk 2.7 and Reposync: Internal Server Error

    calendar Jan 24, 2018 · 3 min read · selinux spacewalk  ·
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    After my last Spacewalk 2.7 installation I had the problem that synchronising repositories using the web interface failed with the following error: The system protocol (/var/log/messages) included the following finding: 1Jan 24 21:02:13 st-spacewalk03 server: Caused by: java.lang.RuntimeException: File not found: …


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  • Create SELinux module for NRPE and check_fail2ban

    calendar May 28, 2016 · 5 min read · selinux  ·
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    If you need to protect a Linux host against unauthorized access, fail2ban is a very handy service. The application scans log files of various services, automatically detects failed logins and blocks attacker's IP addresses. Especially on public hosts, it is essential to implement a protection like this on prominent …


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