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Security

pfsense - CRL has expired in openvpn server

pfsense - CRL has expired in openvpn server

A few days ago we ran into an issue where pfsense appliances started to refuse openvpn connections by showing "CRL has expired" error messages. As it shows the reason is an overflow a date.

Daniel Nachtrub
Daniel Nachtrub
Linux
Replace tls cert using commandline (netsh)

Replace tls cert using commandline (netsh)

TLS endpoints on windows are often served by the operating system itself. Related certificate bindings can be managed using the command line easily. This guide shows how to replace a certificate using the commandline.

Daniel Nachtrub
Daniel Nachtrub
Windows
git on windows on CA's without crl (mostly pki)

git on windows on CA's without crl (mostly pki)

If you're working with git and are using certificates without revocation lists on windows this article shows how you can disable ssl revocation checks on git client.

Daniel Nachtrub
Daniel Nachtrub
Windows
Docker - Hardening with firewalld

Docker - Hardening with firewalld

Containers are no virtual machines - yet we might want to treat hosts running container workloads like hypervisors and apply limitations on container networking. This guide describes a way to limit container networking on docker based container hosts using firewalld.

Daniel Nachtrub
Daniel Nachtrub
Linux