corpus.blog
41554 blogs · [ { "id": "01a087d6-070e-710a-b52b-2a6188db7e8d", "title": "How to Verify Full TLS Certificate Chains Against CRLs via OpenSSL CLI", "url": "https://robert.penz.name/1633/how-to-verify-full-tls-certificate-chains-against-crls-via-openssl-cli/", "published_at": "2026-07-28T19:08:22+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a6189a2cdb3", "title": "Quick Tip: How to Completely Reset Podman Storage", "url": "https://robert.penz.name/1630/quick-tip-how-to-completely-reset-podman-storage/", "published_at": "2026-07-23T20:00:32+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618a8c4a6a", "title": "S10/125 vs. E9/125 Fiber – Can You Connect Them?", "url": "https://robert.penz.name/1628/s10-125-vs-e9-125-fiber-can-you-connect-them/", "published_at": "2026-07-22T16:09:18+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618b5bc6d9", "title": "The Vikunja Email Pitfall: Why CLI Password Resets Claim Success But Fail (And How to Fix It)", "url": "https://robert.penz.name/1626/the-vikunja-email-pitfall-why-cli-password-resets-claim-success-but-fail-and-how-to-fix-it/", "published_at": "2026-07-19T20:38:22+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618bf47190", "title": "Locking Down DNS on MikroTik: How to Force Local DNS and Block Bypass Attempts", "url": "https://robert.penz.name/1624/locking-down-dns-on-mikrotik-how-to-force-local-dns-and-block-bypass-attempts/", "published_at": "2026-07-17T17:07:25+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618c62ee8f", "title": "Why Adding DHCP Option 121 Breaks Your Default Gateway (and How to Fix It)", "url": "https://robert.penz.name/1619/why-adding-dhcp-option-121-breaks-your-default-gateway-and-how-to-fix-it/", "published_at": "2026-07-17T11:57:28+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618d039ea6", "title": "Evolution of the LWZ Monitoring: From Python to ESPHome", "url": "https://robert.penz.name/1614/evolution-of-the-lwz-monitoring-from-python-to-esphome/", "published_at": "2026-05-29T19:42:43+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618dbff500", "title": "modsecurity rule to filter CVE-2021-44228/LogJam/Log4Shell [update]", "url": "https://robert.penz.name/1602/modsecurity-rule-to-filter-cve-2021-44228-logjam-log4shell/", "published_at": "2021-12-10T20:53:00+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618dd6c656", "title": "Jitsi Workaround for CVE-2021-44228/LogJam/Log4Shell", "url": "https://robert.penz.name/1595/jitsi-workaround-for-cve-2021-44228-logjam/", "published_at": "2021-12-10T20:20:28+00:00" }, { "id": "01a087d6-070e-710a-b52b-2a618eb6a14b", "title": "Proxmox Container with Debian 10 does not work after upgrade", "url": "https://robert.penz.name/1582/proxmox-container-with-debian-10-does-not-work-after-upgrade/", "published_at": "2019-09-08T13:27:48+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2ba1148c0", "title": "Howto visualize your water meter and get alerted if too much water is used", "url": "https://robert.penz.name/1566/howto-visualize-your-water-meter-and-get-alerted-if-too-much-water-is-used/", "published_at": "2019-05-01T14:26:23+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2ba3634ad", "title": "Howto install Wireguard in an unprivileged container (Proxmox)", "url": "https://robert.penz.name/1562/howto-install-wireguard-in-an-unprivileged-container-proxmox/", "published_at": "2019-04-14T18:38:51+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bae3bda8", "title": "Howto install Bitwarden in a LXC container (e.g. Proxmox)", "url": "https://robert.penz.name/1556/howto-install-bitwarden-in-a-lxc-container-e-g-proxmox/", "published_at": "2019-01-13T17:32:57+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bb97434a", "title": "QuickTip: Howto secure your Mikrotik/RouterOS Router and specially Winbox", "url": "https://robert.penz.name/1546/quicktip-howto-secure-your-mikrotik-routeros-router-and-specially-winbox/", "published_at": "2018-10-06T15:50:45+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bc2686b4", "title": "Some VPN providers leak your IPv6 IP address", "url": "https://robert.penz.name/1538/some-vpn-providers-leak-your-ipv6-ip-address/", "published_at": "2018-08-10T17:54:34+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bc549e47", "title": "How to configure a Mikrotik router as DHCP-PD Client (Prefix delegation)", "url": "https://robert.penz.name/1522/how-to-configure-a-mikrotik-router-as-dhcp-pd-client-prefix-delegation/", "published_at": "2018-02-06T20:31:36+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bd02deb2", "title": "Tips / Solutions for settings up OpenVPN on Debian 9 within Proxmox / LCX containers", "url": "https://robert.penz.name/1498/tips-solutions-for-settings-up-openvpn-on-debian-9-within-proxmox-lcx-containers/", "published_at": "2017-09-21T10:32:21+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bdf469a3", "title": "Howto setup a Debian 9 with Proxmox and containers using as few IPv4 and IPv6 addresses as possible", "url": "https://robert.penz.name/1483/howto-setup-a-debian-9-with-proxmox-and-containers-using-as-few-ipv4-and-ipv6-addresses-as-possible/", "published_at": "2017-08-04T14:44:11+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2becb247e", "title": "A security minded guy forced to buy a Wifi enabled cleaning robot", "url": "https://robert.penz.name/1462/a-security-minded-guy-forced-to-buy-a-wifi-enabled-cleaning-robot/", "published_at": "2017-08-01T19:07:42+00:00" }, { "id": "01a0bdf6-9d87-7057-8ca6-88f2bf761a1c", "title": "WannaCry happened and nobody called me during my vacation – I tell you why", "url": "https://robert.penz.name/1446/wannacry-happened-and-nobody-called-me-during-my-vacation-i-tell-you-why/", "published_at": "2017-05-18T20:20:04+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e53d7f9e", "title": "Mitigating application layer (HTTP(S)) DDOS attacks", "url": "https://robert.penz.name/1441/mitigating-application-layer-https-ddos-attacks/", "published_at": "2017-04-23T13:55:49+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e55cbfac", "title": "Implementing IoT securely in your company – Part 3", "url": "https://robert.penz.name/1424/implementing-iot-securely-in-your-company-part-3/", "published_at": "2017-02-02T19:08:56+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e5e1f3b0", "title": "Implementing IoT securely in your company – Part 2", "url": "https://robert.penz.name/1422/implementing-iot-securely-in-your-company-part-2/", "published_at": "2017-01-12T19:35:23+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e67bba52", "title": "Implementing IoT securely in your company – Part 1", "url": "https://robert.penz.name/1420/implementing-iot-securely-in-your-company-part-1/", "published_at": "2017-01-06T09:44:58+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e6e0625a", "title": "How to brute force a MySQL DB", "url": "https://robert.penz.name/1416/how-to-brute-force-a-mysql-db/", "published_at": "2016-12-29T14:06:23+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e724c77a", "title": "Accessing Mikrotik RouterOS via MAC Telnet from a Linux box", "url": "https://robert.penz.name/1412/accessing-mikrotik-routeros-via-mac-telnet-from-a-linux-box/", "published_at": "2016-11-18T20:00:17+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e7b31b49", "title": "248 days uptime is bad for a Mikrotik running RouterOS below 6.34", "url": "https://robert.penz.name/1408/248-days-uptime-is-bad-for-a-mikrotik-running-routeros-below-6-34/", "published_at": "2016-11-14T18:57:58+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e8762616", "title": "Howto live-sniffer traffic on a remote Linux system with Wireshark", "url": "https://robert.penz.name/1393/howto-live-sniffer-traffic-on-a-remote-linux-system-with-wireshark/", "published_at": "2016-10-02T12:27:44+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e8cfc80e", "title": "Howto protect BGP router against DOS and injection attacks", "url": "https://robert.penz.name/1386/howto-protect-bgp-router-against-dos-and-injection-attacks/", "published_at": "2016-09-17T12:00:57+00:00" }, { "id": "01a0be04-a7ac-73e9-abf8-be84e97d785d", "title": "Spiegel Online uses a 2000 years old cipher for their pay wall", "url": "https://robert.penz.name/1370/spiegel-online-uses-a-2000-years-old-cipher-for-their-pay-wall/", "published_at": "2016-08-03T18:32:22+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e605899c8e8a", "title": "HiKam A7 – IoT security at its worst [Update]", "url": "https://robert.penz.name/1348/hikam-a7-iot-security-at-its-worst/", "published_at": "2016-07-08T20:33:24+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058a87f286", "title": "Ready your home network for IoT", "url": "https://robert.penz.name/1341/ready-your-home-network-for-iot/", "published_at": "2016-07-02T08:30:06+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058b77db11", "title": "The insecurity of the building automation system KNX", "url": "https://robert.penz.name/1326/the-insecurity-of-the-building-automation-system-knx/", "published_at": "2016-04-29T15:18:05+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058bbf3001", "title": "New RTF macro Malware from the Dridex gang", "url": "https://robert.penz.name/1306/new-rtf-macro-malware-from-the-dridex-gang/", "published_at": "2016-03-23T19:09:49+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058bfce535", "title": "Blue Code mobile payment – All show and no substance [3. Update]", "url": "https://robert.penz.name/1273/blue-code-mobile-payment-all-show-and-no-substance/", "published_at": "2016-03-20T15:19:51+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058c8b4c3c", "title": "Block Ransomware botnet C&C traffic with a Mikrotik router", "url": "https://robert.penz.name/1262/block-ransomware-botnet-cc-traffic-with-a-mikrotik-router/", "published_at": "2016-03-14T19:40:52+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058d6ce468", "title": "Stop panicking about the Locky ransomware [Update 2]", "url": "https://robert.penz.name/1252/stop-panicking-about-the-locky-ransomware/", "published_at": "2016-02-22T18:05:38+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058da8fe3f", "title": "Setup Let’s encrypt TLS certificate for Proxmox [Update]", "url": "https://robert.penz.name/1248/setup-lets-encrypt-tls-certificate-for-proxmox/", "published_at": "2016-02-21T19:22:50+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058e589736", "title": "Tips on how to provide a secure public WiFi hotspot – Part 3", "url": "https://robert.penz.name/1184/tips-on-how-to-provide-a-secure-public-wifi-hotspot-part-3/", "published_at": "2016-02-04T20:57:39+00:00" }, { "id": "01a0be0b-22ea-700f-ac90-e6058ec957e4", "title": "Austrian Mobile Phone Signature is vulnerable against phishing and MitM attacks", "url": "https://robert.penz.name/1224/austrian-mobile-phone-signature-is-vulnerable-against-phishing-and-mitm-attack/", "published_at": "2016-02-01T20:19:07+00:00" } ] posts Claim your blog
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robert.penz.name

2026

How to Verify Full TLS Certificate Chains Against CRLs via OpenSSL CLIoriginal ↗
28 Jul 2026
Quick Tip: How to Completely Reset Podman Storageoriginal ↗
23 Jul 2026
S10/125 vs. E9/125 Fiber – Can You Connect Them?original ↗
22 Jul 2026
The Vikunja Email Pitfall: Why CLI Password Resets Claim Success But Fail (And How to Fix It)original ↗
19 Jul 2026
Locking Down DNS on MikroTik: How to Force Local DNS and Block Bypass Attemptsoriginal ↗
17 Jul 2026
Why Adding DHCP Option 121 Breaks Your Default Gateway (and How to Fix It)original ↗
17 Jul 2026
Evolution of the LWZ Monitoring: From Python to ESPHomeoriginal ↗
29 May 2026

2021

modsecurity rule to filter CVE-2021-44228/LogJam/Log4Shell [update]original ↗
10 Dec 2021
Jitsi Workaround for CVE-2021-44228/LogJam/Log4Shelloriginal ↗
10 Dec 2021

2019

Proxmox Container with Debian 10 does not work after upgradeoriginal ↗
8 Sept 2019
Howto visualize your water meter and get alerted if too much water is usedoriginal ↗
1 May 2019
Howto install Wireguard in an unprivileged container (Proxmox)original ↗
14 Apr 2019
Howto install Bitwarden in a LXC container (e.g. Proxmox)original ↗
13 Jan 2019

2018

QuickTip: Howto secure your Mikrotik/RouterOS Router and specially Winboxoriginal ↗
6 Oct 2018
Some VPN providers leak your IPv6 IP addressoriginal ↗
10 Aug 2018
How to configure a Mikrotik router as DHCP-PD Client (Prefix delegation)original ↗
6 Feb 2018

2017

Tips / Solutions for settings up OpenVPN on Debian 9 within Proxmox / LCX containersoriginal ↗
21 Sept 2017
Howto setup a Debian 9 with Proxmox and containers using as few IPv4 and IPv6 addresses as possibleoriginal ↗
4 Aug 2017
A security minded guy forced to buy a Wifi enabled cleaning robotoriginal ↗
1 Aug 2017
WannaCry happened and nobody called me during my vacation – I tell you whyoriginal ↗
18 May 2017
Mitigating application layer (HTTP(S)) DDOS attacksoriginal ↗
23 Apr 2017
Implementing IoT securely in your company – Part 3original ↗
2 Feb 2017
Implementing IoT securely in your company – Part 2original ↗
12 Jan 2017
Implementing IoT securely in your company – Part 1original ↗
6 Jan 2017

2016

How to brute force a MySQL DBoriginal ↗
29 Dec 2016
Accessing Mikrotik RouterOS via MAC Telnet from a Linux boxoriginal ↗
18 Nov 2016
248 days uptime is bad for a Mikrotik running RouterOS below 6.34original ↗
14 Nov 2016
Howto live-sniffer traffic on a remote Linux system with Wiresharkoriginal ↗
2 Oct 2016
Howto protect BGP router against DOS and injection attacksoriginal ↗
17 Sept 2016
Spiegel Online uses a 2000 years old cipher for their pay walloriginal ↗
3 Aug 2016
HiKam A7 – IoT security at its worst [Update]original ↗
8 Jul 2016
Ready your home network for IoToriginal ↗
2 Jul 2016
The insecurity of the building automation system KNXoriginal ↗
29 Apr 2016
New RTF macro Malware from the Dridex gangoriginal ↗
23 Mar 2016
Blue Code mobile payment – All show and no substance [3. Update]original ↗
20 Mar 2016
Block Ransomware botnet C&C traffic with a Mikrotik routeroriginal ↗
14 Mar 2016
Stop panicking about the Locky ransomware [Update 2]original ↗
22 Feb 2016
Setup Let’s encrypt TLS certificate for Proxmox [Update]original ↗
21 Feb 2016
Tips on how to provide a secure public WiFi hotspot – Part 3original ↗
4 Feb 2016
Austrian Mobile Phone Signature is vulnerable against phishing and MitM attacksoriginal ↗
1 Feb 2016