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Postfix "unavailable. unsupported dictionary type 1111" on restart? Check your brackets!

I was recently modifying a Postfix config to do some debug logging of transactions for a specific IP addresses. To do this, I modified the smtp and smtps services in master.cf to get the most verbose logging possible. However, I'd failed to remember to encapsulate the IPv6 address with brackets. And so, I got this in the log after restarting […]

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 […]

Dear mailserver operators: PLEASE stop using SSLv3!

I look after a few email servers and after implementing much stricter encryption settings at the start of the year, I noticed some emails were never making it to accounts - being rejected at the negotiation stage (where the remote server sending the email agrees an encryption protocol and cipher with the local server). I was puzzled by this. TLS […]

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 […]

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.

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