query about EDNS UDP Packet

[Gaurav Kansal]

Hi Team,

Thanks for help.
My Firewall was dropping packet size larger than 512 bytes.
Cisco 5580 having ASA 8.3. It is by default blocking my EDNS0 Packet.


Thanks and Regards,
Gaurav Kansal


On 12/31/12, Sten Carlsen  <stenc at s-carlsen.dk> wrote:
> 
>   
> 
> 
>  With the replies you have shown, the limitation is very likely within your own walls.
>  
>  While it is possible that some router on the path between you and the test server limits the packet size, I would say it is very likely not the case, much less than 1% propability - according to my experience.
>  
>  I would use a sniffer along the path between each switch/router/firewall/xx until you either don't see the longer edns0 packets or some other evidence (could be some ICMP message) shows you that this is the place.
>  
>  I would also search for keywords like: DNS EDNS0 truncate.
>  
>  Good hunting.
>  
> 
>  On 31/12/12 15:07, Phil Mayers wrote:
>  
>  
> > On 12/31/2012 10:54 AM, Gaurav Kansal wrote: 
> >  
> > > I just want to test whether this limit is within my organization. 
> > >  
> > >  Is any method available by which I can check this? 
> > >  
> > >  
> >  
> >  
> >  https://www.dns-oarc.net/oarc/services/replysizetest 
> >  
> >  
> >  _______________________________________________ 
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> >  
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> >  
>  
>  
> -- Best regards Sten Carlsen No improvements come from shouting: "MALE BOVINE MANURE!!!" 
> 
>  
> 
> 
--
Thanks n Regards, 
GAURAV KANSAL 
9910118448 
Operation And Routing Unit 
NIC , NEW DELHI 

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