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Felix J. Ogris' private homepage: some stuff about homemade software, FreeBSD, Linux, computers, and hacking in general.

Somewhat more nosy? Mailto www@ogris.de.

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IPv6 test pages

v6only.ogris.net which resolves to and is reachable only by an IPv6 address
purev6.ogris.net which resolves to and is reachable only by an IPv6 address, and whose authorative nameserver is reachable only by IPv6

recent news

[2026-03-21] I switched from BIND to Unbound as my caching DNS resolver.

[2025-11-15] My howto Upgrading PostgreSQL with pg_upgrade on FreeBSD now covers PostgreSQL 18 on FreeBSD 14.

[2025-10-22] Added Bind 9.21 to my How to use a custom-built jemalloc with BIND on FreeBSD

[2025-09-28] How to run FreeBSD as virtual machine using bhyve

[2025-09-21] How to use a custom-built jemalloc with BIND on FreeBSD

[2025-06-21] ovpn.py version 3 allows you to sort the client list and routing table by real addresses when clients have connected using an IPv6 address.

[2025-06-08] Environmental sensors based on the ESP8266.

[2025-06-07] getpeercred.c prints the name or the uid of the user connected to a stream oriented local unix socket on stdin, stdout, or stderr (file descriptor 0, 1, or 2, in that order).

[2025-05-25] In case you have to activate a ludicrous amount of swap on your FreeBSD machine, e.g. 200 gigabytes, then add this to /boot/loader.conf and reboot:

kern.maxswzone=1073741824

Otherwise, you will get errors like these:

kernel: warning: total configured swap (57147382 pages) exceeds maximum recommended amount (11842904 pages).
kernel: warning: increase kern.maxswzone or reduce amount of swap.

[2025-05-08] New version of s3file.py fixes two warnings when setting a compliance or governance lock, and does not call utcnow() as it has been deprecated in Python 3.12.

[2025-04-03] If Firefox doesn't accept a server certificate you built with easy-rsa, then generate your SSL certificate with a subject alternative name:

$ easyrsa --subject-alt-name="DNS:www.mydomain.invalid" build-serverClient-full www.mydomain.invalid nopass

RFC 2818 discouraged the use of the common name (CN) attribute in the subject field of a SSL certificate. Most webbrowsers nowadays require subject alternative names to be present.

[2025-03-29] graypold version 12 allows you to specify the maximum number of "void" DNS look-ups per SPF check via the spf_max_void_dns_lookups configuration option. Please see the provided graylib.pm for reference.

old news

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