[sdnog] DNS Queries

[Sahlih Shihab]

Hi all 

I think the DNS use TCP in transaction between dns-master and dns-salve to update the zones in dns-slave, am I right? 
Thanks 


----- Original Message -----

From: "wadah khalid" <engwada7 at gmail.com> 
To: "Philip Paeps" <philip at trouble.is> 
Cc: sdnog at sdnog.sd 
Sent: Monday, August 22, 2016 3:32:03 PM 
Subject: Re: [sdnog] DNS Queries 




The IETF RFC 5966 says that : 
Most of DNS operations are UDP 
Recursive server (or forwarder) implementations MUST support TCP 
so that they do not prevent large responses from a TCP-capable 
server from reaching its TCP-capable clients. 
بتاريخ ٢٢‏/٠٨‏/٢٠١٦ ٣:١٤ م، جاء من "Philip Paeps" < philip at trouble.is >: 


On 2016-08-22 13:36:35 (+0200), wadah khalid < engwada7 at gmail.com > wrote: 

> thank you for your response .. 
> as i know DNS has two operation queries - (1)recursive query which is the 
> operation between the client and server and 
> *(2) iterative query which represents the relation between my server and 
> other DNS servers . * 

Both of those queries are identical. 

> *i think the recursive is tcp rather than the iterative which is udp ...* 
> *what do you think* 

You think wrong. I would recommend reading section 4.2 of RFC 1035 again. 

Philip 

-- 
Philip Paeps 
Senior Reality Engineer 
Ministry of Information 




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