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Block Ransomware botnet C&C traffic with a Mikrotik router
In my last blog post I wrote about blocking, detecting and mitigating the Locky Ransomware. I’ve referenced to a earlier blog post of mine which allows to block traffic to/from the Tor network. This...
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Howto live-sniffer traffic on a remote Linux system with Wireshark
You ask why you should need this at all? Easy, sometimes a tcpdump is not enough or not that easy to use: You want to check the TTL/hop count of BGP packets before activating TTL security You want to...
View ArticleAccessing Mikrotik RouterOS via MAC Telnet from a Linux box
If you know Mikrotik Routers you know that you’re able to access them via MAC Telnet (see here for more details) via Layer2 with Winbox. But running Winbox via Wine on a Linux is not that great for...
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Howto setup a Debian 9 with Proxmox and containers using as few IPv4 and IPv6...
My current Linux Root-Server needs to be replaced with a newer Linux version and should also be much cheaper then the current one. So at first I did look what I don’t like about the current one: It is...
View ArticleHowto install Bitwarden in a LXC container (e.g. Proxmox)
As many of you know me, I’m quite serious about security and therefore a believer in the theory that a service which is not reachable (e.g. from the Internet) cannot be attacked as easily as one that...
View ArticleHowto install Wireguard in an unprivileged container (Proxmox)
Wireguard is the new star on the block concerning VPNs – and yes it has some benefits to the old VPN technologies but I won’t talk about them as there is much information about that on the Internet....
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Howto visualize your water meter and get alerted if too much water is used
In the village I live the water meter is replaced every 5 years and it was the fifth’s year this year. I took the opportunity to talk to the municipal office, if it was possible to get a water meter...
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Proxmox Container with Debian 10 does not work after upgrade
I just did an apt update / upgrade of a Debian 10 container and restarted it afterwards and got following: # pct start 105 Job for pve-container@105.service failed because the control process exited...
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Jitsi Workaround for CVE-2021-44228/LogJam/Log4Shell
You surely heard of the LogJam / Log4Shell / CVE-2021-44228 – if not, take a look at this blog post. If you’re running Jitsi is most likely vulnerable and as there is no fix currently, you need a...
View Articlemodsecurity rule to filter CVE-2021-44228/LogJam/Log4Shell [update]
As a fast workaround, a friend of mine made a modsecurity rule to filter CVE-2021-44228/LogJam/Log4Shell, which he allowed me to share with you. SecRule \...
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