Funny cache records

[Barry Margolin]

In article <c1654u$3090$1 at sf1.isc.org>,
 Jeff Stevens <jstevens at vnet.ibm.com> wrote:

> On 2/20/2004 5:06 PM, Barry Margolin wrote:
> > 
> > I'm not sure why the sbcglobal.net server is involved at all.  Does he 
> > have "forwarders" configured?  Tell him to use the root servers directly 
> > instead of forwarding to his ISP's servers.
> > 
> I think his ISP is doing something funny, he forwards to 3 locations, 2 
> being his ISP and I see this other crud in the cache, which makes me 
> think his ISP is doing something funny...

Let me guess, his default domain is edgesuite.net, right?

I suspect his ISP is making use of some transparent web caching provided 
by Akamai, and it involves using DNS to redirect traffic to their 
servers.

> 
> 
> $ORIGIN msn.com.edgesuite.net.
> search	1067	IN	CNAME	a134.ms.akamai.net.	;Cr=answer [206.13.29.12]
> entimg	1567	IN	CNAME	a397.ms.akamai.net.	;Cr=answer [206.13.28.12]
> sc	2578	IN	CNAME	a1038.ms.akamai.net.	;Cr=answer [206.13.28.12]
> $ORIGIN search.msn.com.edgesuite.net.
> auto	1110	IN	CNAME	a134.ms.akamai.net.	;Cr=answer [206.13.29.12]
> $ORIGIN msnbc.msn.com.edgesuite.net.
> media	3496	IN	CNAME	a365.ms.akamai.net.	;Cr=answer [206.13.29.12]
> $ORIGIN aol.com.edgesuite.net.
> cdn	2056	IN	CNAME	a1009.aol.akamai.net.	;Cr=answer [206.13.28.12]
> $ORIGIN careerbuilder.com.edgesuite.net.
> media	44568	IN	CNAME	a552.g.akamai.net.	;Cr=answer [206.13.29.12]
> $ORIGIN ru4.com.edgesuite.net.
> content	2210	IN	CNAME	a2047.na.akamai.net.	;Cr=answer [206.13.28.12]
> $ORIGIN unicast.com.edgesuite.net.
> cache	9548	IN	CNAME	a853.xc.akamai.net.	;Cr=answer [206.13.28.12]
> $ORIGIN thepassionofthechrist.com.edgesuite.net.
> www	2346	IN	CNAME	a581.g.akamai.net.	;Cr=answer [206.13.29.12]
> $ORIGIN reuters.com.edgesuite.net.
> wwwi	259	IN	CNAME	a1010.g.akamai.net.	;Cr=answer [206.13.28.12]

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA