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Inside The Box

Canon Pixma owners: this one simple trick makes your printer's feed rollers able to grab paper again!

I have a cheap Canon Pixma MG5750, a Currys PC World purchase when I needed a cheap multifunction printer fast. Was handy at £45 (another set of genuine ink for it costs the same, go figure) but obviously I never expected it to be perfect. Unfortunately, one of the fundamental requirements of any printer - to be able to take […]

MaxMind GeoLite v1 databases discontinued - install GeoLite2

I noticed recently that a few web sites are miscategorising my ISP's static IP as being in the wrong country. I knew it was a recent reallocation of a new block and suspected the web sites were using a stale version of a GeoIP database - probably MaxMind's GeoLite v1 offering. If you see stuff like this while surfing the […]

Getting Postfix working for outbound emails via SMTP and local relay for cron reports

I recently had to diagnose a couple of servers running Postfix which emailed results of rsync cronjobs when they returned a non-OK value. While Postfix was emailing the recipients on rsync failure, I noticed that the cronjob STDOUT was not being locally relayed correctly to the root mail. I documented my fix on ServerFault, hopefully it's useful for someone else. […]

Tiplet: DO NOT USE the # symbol in Oracle Enterprise Communication Broker passwords!

I've been working with Oracle Session Border Controllers and Enterprise Communications Brokers a lot recently, A couple of weeks ago I encountered what I think is a new - and quite serious - bug (it's with Oracle for investigation) regarding how the devices *mis*handle special characters. If you admin ECBs or SBCs and are planning to change their credentials to include non-alphanumeric characters, read this first.

Updating jwhois on CentOS to solve v6nic errors

I use fail2ban on my servers, and I noticed whois queries to v6nic.net were running into problems. If you're having the same problems, here's how to fix them.

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