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Nov 27th, 2012 by Tim Watts

I am doing some work from home today – it’s raining and that’s slowing the roofing work down.

I will be taking 6 days leave between 26th Nov to 7th Dec to use up holiday I cannot carry over.

I will be working 2 days each week from home – but as I am working with a contractor on fixing my roof (he does the roof, I fit new windows as he’s ready to do leadwork) I am not sure exactly which days these will be.

Jobs into Mantis as usual – please assign to me and rate the priority sensibly and it will be seen, and likely, attended to fairly expediently ūüôā

Changing your DDH password
Nov 23rd, 2012 by Tim Watts

This is now hopefully much easier. Just visit:

https://account.cch.kcl.ac.uk/chpw.cgi

22 Kingsway Photos
Nov 7th, 2012 by Tim Watts

Well, I went on the guided tour today at 11am. Not really a Systems thing – but I thought people might be interested in some piccies:

I have no secret knowledge of anything, except what ITS are doing with the networks (2 gigabit ports per desk, VOIP phones, gig links to the Strand and Waterloo – there – that’s everything!).

Any perceived bias or opinions are mine alone and do not represent a departmental view.

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7th (top) floor – not refurbished – it is a very very long space!

It’s big… And decoratively, it will look nothing like the above when it’s finished.

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View out of one of the windows. All the views are pretty nice – except the tower crane, which will be gone soon enough.

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6th floor (IIRC) some experimental markups of desk layouts.

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6th Floor again – marked out offices.

The Estates chap was quick to say the above marking out was only an illustration and that no final floor designs had been done yet. He said the final designs were in part down to the School and each Department and any ideas or concerns should be fed through your local user groups.

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That building is not going any higher – allegedly.

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Southern end stairwell.

It does look very “Government” which is reasonable as it was occupied by HMRC.

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“The Space” – ground floor.

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“The Space”

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“The Space”

It seems the College is not sure what to do with ¬†“The Space” on the ground floor – it is bigger than seems above as the walls to the left will come out adding another area into the room.

There are rumours of it being a cafe, or some other “public” gathering area. The College want to hear ideas. Again, I guess through the user groups, whenever those are formed.

 

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Windows with secondary glazing

The chap from Estates said they might not put air conditioning on the upper floors as you could open the windows both sides. However, when I opened two of the internal glass sliders (leaving the outer windows closed because there were locked) quite a lot of street and building work noise was apparent. I would have to say I am dubious about this.

 

DNS problem accessing www.roh.org.uk
Nov 1st, 2012 by Tim Watts

Just spent 4 hours or so doing IP packet traces and talking with ITS.

No-one on College networks can see the Royal Opera House’s website¬†http://www.roh.org.uk/

It seems that their DNS hoster, exponential-e.net is returning malformed DNS packets. DNS uses UDP by default, which limits DNS replies to 512 bytes.

If the DNS needs to return a larger amount of data, it will set the DNS Truncated flag and the client (your PC) will then retry the query using TCP instead, which has no practical limit on size of data returned.

The ROH DNS is setting the Truncated flag, but is not cleaning up the data, but just chopping it off half way through a record. The King’s College Firewall regards this is “malformed” and throws the packet away. Therefore the client does not see the truncated response so does not retry using TCP and the whole process falls flat on its face.

The King’s Firewall should possibly be a little more tolerant (Amazon ELB had the same problem with their DNS earlier this year) but Exponential-E.net should¬†definitely¬†fix their DNS as it does *appear* to be in violation of the RFCs.

I have put the analysis to the Networks Manager of the ROH and to the Servers Team at ITS who are liasing with the Security Team here.

WordPress Blogs and Comment SPAM
Nov 1st, 2012 by Tim Watts

Just to make you aware, anyone running a blog could make use of the already paid for Akismet anti spam filter. This merely needs enabling if required on a per blog basis Рdrop a request into Mantis.

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