VMWare and Firewall / VPN Clients

Well, that was another morning well spent....

A couple off weeks ago I started experimenting with FreeRADIUS on Ubuntu server (v6.06.2 TLS). Mainly because I needed to test some things for work. So I used VMWare to experiment. The networking part was set-up as Bridged.

Today, I wanted to test with iperf (a tool for network performance testing). So I launched the virtual machine, but there was no network connectivity. ifconfig showed that eth1 didn't received an IP adres.
So I ran every possible test there was;

  • restarted the interfaces (/etc/init.d/networking restart)

This resulted in the following;

Listening on LPF/eth1/00:0c:29:68:e3:eb
Sending on LPF/eth1/00:0c:29:68:e3:eb
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12

The "DHCPDISCOVER" messages continue about 4 times, then the message:

No DHCPOFFERS received.
No working leases in persistent database - sleeping.

  • restarted the DHCP server
  • rebooted the virtual machine
  • changes the networking to NAT instead of Bridged (this way, connectivity was restored, but not the way I wanted. I needed Bridge-mode)
  • Tried to run the virtual machine on OSX (VMWare Fusion), which worked surprisingly.

After this I ran Wireshark on my server to see if DHCP request were coming in.... And you might have guessed; No DHCP request were reaching the DHCP server. So the problem was work PC related.... As a matter of fact, I had the Cisco VPN client running..... Which didn't allow the DHCP request broadcast.

Shutting the VPN client down solved the DHCP problem. After the virtual machine worked I could reinitiate the VPN.

Mental note to myself: do NOT boot/restart the virtual machines when the VPN is up.

Authentication Required While Printing on OSX 10.5.2

Since I upgraded from OSX 10.5.1 to 10.5.2 I haven't been able to use my shared printer on on my Windows server. Every job I submit gives me an error saying On Hold (Authentication Required).

There's no way that I could submit the printjob to the server from my Mac.

It seems that there is a bug in the authentication mechanism on OSX 10.5.2. If you add a (network) printer by using the System Preferences, you get to browse to find the actual printer.

Posted on March 31, 2008 and filed under Annoying, Apple, Tips'n Tricks.

Wordpress v2.5 Upgrade

Today, I upgraded to Wordpress 2.5. The upgrade proces was easy as usual. Before the upgrade I checked all the plugins used, and upgraded those first. The new features / layout of the adminpages are great. Also the new editor works like a charm (even on Safari). Somehow it feels a bit more intuitive.

Only downside is that the Wordpress Stats on the dashboard won't work in FireFox. It works fine in Safari. Instead of showing the graph in FireFox it shows the actual dasboard page from wordpress.com.

Posted on March 31, 2008 and filed under Website, WordPress.

Nokia E61i Firmware Update - update

It's been a couple of days since my firmware update, so it's time for a small update on the subject.

The biggest advantage is that the mail client is very stable. I use (secure) IMAP and I have 3 mailboxes configured on the device. The mail client hasn't crashed yet.

The biggest downside (in my opinion) is that the 3G connection drops automatically, so you need to re-establish the connection every time. Sure, it saves bandwidth (and costs), but it's annoying that you actively have to monitor your e-mail.

Thankfully, the advantages outweigh the disadvantages, so I'm still happy with the Nokia E61i.

Posted on March 28, 2008 and filed under Personal, Symbian.

OSX Update Galore

There are lot's of people who complain about the updates on the Windows platform, but Apple tries to compete I guess. In the last 3 days there was a big security update, Safari 3.1 (both Windows and OSX), Time machine and Airport Updates, and now a Camera RAW update for OSX 10.5.2. Thankfully no problems on my side with the updates. Looking for other updates from Apple? Just go here.
Posted on March 20, 2008 and filed under Apple, Operating Systems, Photography, Security, Software.

Nokia E61i Firmware Update

Early this week, I found a new firmware for my Nokia E61i (out since October 2007). The version I had was v1.x, and this one was v2.0633.65.01 (press *#000# on your E61 to see the current firmaware version). Updating goes through a separate application, but it should also be possible through download over the mobile network (I haven't tried this). All you need to know is explained on the Nokia website, but there are some thing you don't want to forget;
  • Use the Nokia Datasuite to create a FULL backup of the phone, because during the upgrade the phone goes back to factory defaults.
  • Have lot's of patience (and some deodorant handy)
  • Make sure the PC isn't doing anything else that might interfere with the update.
The first attempt failed for me. Even with all the warnings (DO NOT INTERRUPT THE UPDATING PROCESS OR DISCONNECT THE PHONE!!!) I rebooted the PC and disconnected the phone. Result, the phone didn't respond (this is where my deodorant came in). After this I restarted the upgrade process, and the phone got recognized (thankfully). After 10 minutes, the phone rebooted with the new firmware version. First action was to restore all data and settings on the phone. Since I had some issues with my network connectivity I decided to remove the Access Points and reconfigure them.... Well, don't. First of all, I wasn't able to receive the configuration parameters from the mobile operator (SMS 'ja' to 1300), so I had to reconfigure them manually. Their website has a step-by-step manual on configuring the E61i, but this didn't help either. MMS functionality remained absent, and none of the applications was able to connect to the Internet by itself. I had to initiate the connection manually before browsing the web. E-mail was even worse. Every time I had 'Packet Authentication' errors. So after a day I decided to restore the Access Points from my backup, and guess what... Everything worked again. And now for the thing that have changed (at least the ones that I've noticed);
  • the e-mail application seems more stable
  • camera and video are still crappy (the time between the snapshot sound and the actual capture is still multiple seconds)
  • Idle connections are terminated. This is a bad thing (for me at least), because I had my UMTS connection open all the time, and this way I received mail throughout the day. Now I have to connect each time I want to check my e-mail.
I haven't tried VoIP yet, but will try to do so soon (that's what happens when you don't pay for your own bills :-) ) Conclusion is that the phone didn't get better. There are some improvements, and there are some new annoyances. But my e-mail is stable at this moment.
Posted on March 15, 2008 and filed under Annoying, Gadgets, Software, Symbian.

Awesome Screensaver

I listened to the latest 'This Week in Tech' podcast today. They mentioned a screensaver called FlickrFan. This screensaver can connect to flickr account and images to use in the screensaver. But it also downloads current Associated Press images in high quality and more. This results in awesome pictures from around the world covering the news in HIGH-RES. B.t.w. it's much more than just a screensaver, but I liked the screensaver-part best.
Posted on March 6, 2008 and filed under Apple, News, Photography, Software, Tips'n Tricks.