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Top Forums UNIX for Advanced & Expert Users bind 9 forwarders: use UDP or TCP? Post 302422221 by honglus on Tuesday 18th of May 2010 12:50:49 AM
Old 05-18-2010
Quote:
Originally Posted by fpmurphy
As far as I know you need to have port 53 open for both UDP and TCP.

Most normal DNS traffic uses UDP not TCP. However AXFR uses TCP
to replicate zone data.
yes, TCP 53 is needed for zone transfer "slave type", but I couldn't find any info about protocol used for r" forward type"

---------- Post updated at 02:50 PM ---------- Previous update was at 10:53 AM ----------

I think sub-zone using forwaders is not going to work.
I ended up using sub-zone delegation, which use UDP only.

CTX124727 - How to Configure DNS Delegation Using BIND - Citrix Knowledge Center
 

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in.timed(1M)						  System Administration Commands					      in.timed(1M)

NAME
in.timed - UDP or TCP time protocol service daemon SYNOPSIS
in.timed FMRI svc:/internet/time:default DESCRIPTION
FMRI stands for Fault Management Resource Identifier. It is used to identify resources managed by the Fault Manager. See fmd(1M) and smf(5). The in.timed service provides the server-side of the time protocol. The time server sends to requestors the time in seconds since midnight, January 1, 1900. The time protocol is available on both TCP and UDP transports through port 37. The in.timed service is an inetd(1M) smf(5) delegated service. The in.timed detects which transport is requested by examining the socket it is passed by the inetd daemon. TCP-based service Once a connection is established, the in.timed sends the time as a 32-bit binary number and closes the connection. Any received data is ignored. UDP-based service The in.timed listens for UDP datagrams. When a datagram is received, the server generates a UDP datagram containing the time as a 32-bit binary number and sends it to the client. Any received data is ignored. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcnsu | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
inetd(1M), attributes(5), smf(5) RFC 868 SunOS 5.10 23 Aug 2004 in.timed(1M)
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