zone transfers sticking on one port?

Barry Margolin barmar at alum.mit.edu
Tue Mar 16 20:03:53 UTC 2004


In article <c37k6f$2t0s$1 at sf1.isc.org>, Jim Reid <jim at rfc1035.com> 
wrote:

> The port chosen is essentially
> random. But it's repeatable. The choice the kernel makes is determined
> by factors like which ports are currently in use. So if the overall
> TCP state of the host is unchanged between connection attempts, the
> chances are the kernel will pick the same ephemeral port number. However
> this is an implementation issue for your kernel's TCP/IP stack.

BIND asks the OS to select a port when it first starts up.  So for the 
life of that named process it always uses the same port number.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***


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