VPN and Resolving Issues on OS X

We have a lab which we can access by using a VPN (Cisco ASA and Cisco AnyConnect). This setup has a so-called split DNS configuration, which means that only resources in the lab are accessed through the VPN tunnel. Regular Internet traffic uses my local DSL connection.

At my house I (like most folks) rely on DHCP for providing me with IP address, gateway and DNS servers. My local subnet uses 192.168.10.1 for DNS and 192.168.10.254 is my default gateway. So my clients are in the same subnet as my DNS server (directly-connected).

All these things considered I should be able to browse the Internet while I have a VPN running. Well, that's where you're wrong.

Posted on September 18, 2016 and filed under Annoying, Apple, Operating Systems, Tips'n Tricks.

Photo Contests, JPEG, and DPI

This post is about something that bothers me a lot. Especially, because it originates from a place where you think they should know better. It's about Dots-Per-Inch (DPI) and JPEG (the popular digital image/photo format).

It all starts, when I read the requirements of certain online photo contests. The criteria for entering the contest contain the following: The photo entering the contest must be in JPEG with maximum quality (least compression), AND 300 DPI.

Posted on August 26, 2016 and filed under Annoying, Photography, Personal, Tips'n Tricks.

Disable Fritzbox Provider Services

This weekend went my Internet (VDLS) down. The DSL part was still up, but the IPv4 connectivity (over PPPoE) was down. When I checked the Fritzbox (7340) I saw that the DLS had 'trained' on ~100Mbps down and ~30Mbps up. Connection speeds I could only dream of......

Trying to re-establish the IPv4 connection I restarted the DSL modem. Upon reboot, it trained on about 70Mbps download and 30Mbps upload, and the PPPoE tunnel for IPv4 established nicely..... for about 5 minutes.

It turned out that the DSL connection tried to get a better connection, and got it. So starting off at 70Mbps, it could establish a 74Mbps a couple of seconds later, and 75Mbps a bit later after that, and so on, and so on. During this time the PPPoE connection worked like a charm. Until the DSL reached the magical 100Mbps rate. That's when the PPPoE (and the actual IPv4 connection to the Internet) failed.

Posted on May 17, 2016 and filed under Annoying, Hardware, Internet, Tips'n Tricks.

The Moon and Jupiter

Last night I was able to capture both the Moon and Jupiter in one frame. Jupiter is (barely) visible on the left side of the photo.

Moon and Jupiter next to each other in the night sky

The following screen capture of the iOS app 'Star Walk' from my iPhone is added for reference.

Star Walk - Moon and Jupiter reference

Posted on April 18, 2016 and filed under Photography.