[ubuntu-uk] Broken Synaptic
andrew at aoakley.com
Wed Feb 20 09:17:11 GMT 2008
> If you use proxy or firewall, don't forget to open port 53.
> It's used by Ubuntu to get update from Repository Server
Um... port 53 is DNS. It is used by everything from Ping through
Firefox. It is the system that translates doman names such as
"www.bbc.co.uk" to numbers such as "188.8.131.52" - in the same way that
you can't dial the name "Dominos Pizza" from your telephone; you have to
look up their telephone number.
Without DNS your system is basically not going to be able to use the
internet in any common way.
Your comment is correct - port 53 IS required by Synaptic - but it is
also required by almost every other internet-aware program in the world.
If port 53 was blocked, you would probably be aware of a lot of other
problems long before you realised Synaptic was broken.
For example, if port 53 was blocked, you wouldn't be able to receive
email and you wouldn't be able to read the ubuntu-uk list. Therefore I
think we can rule this out as the problem.
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