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[asterisk-users] Asterisk 14.0.2 opens a high numbered UDP port

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bbinab at gmail.com
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Posted: Thu Oct 13, 2016 1:37 pm Post subject: [asterisk-users] Asterisk 14.0.2 opens a high numbered UDP p

What part of Asterisk 14.0.2 opens the random, high numbered (33094 currently) UDP port? This port is opened even without any channel drivers loaded. $ sudo netstat -ltunp \| grep asterisk udp 0 0 0.0.0.0:51488 0.0.0.0:* 13830/asterisk udp 0 0 0.0.0.0:5060 0.0.0.0:* 13830/asterisk udp 0 0 :::42516 :::* 13830/asterisk -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Join the Asterisk Community at the 13th AstriCon, September 27-29, 2016 http://www.asterisk.org/community/astricon-user-conference New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users

gjoseph at digium.com
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Posted: Thu Oct 13, 2016 7:59 pm Post subject: [asterisk-users] Asterisk 14.0.2 opens a high numbered UDP p

On Thu, Oct 13, 2016 at 12:35 PM, Brandon B. <bbinab@gmail.com (bbinab@gmail.com)> wrote:

Quote:

What part of Asterisk 14.0.2 opens the random, high numbered (33094 currently) UDP port? This port is opened even without any channel drivers loaded.

$ sudo netstat -ltunp | grep asterisk
udp 0 0 0.0.0.0:51488 0.0.0.0:* 13830/asterisk
udp 0 0 0.0.0.0:5060 0.0.0.0:* 13830/asterisk
udp 0 0 :::42516 :::* 13830/asterisk

Those ports are used by the underlying pjproject DNS resolver. The resolver is always listening on those ports for DNS query responses. 1 for IPV4 and 1 for IPV6. Your firewall should only be allowing responses to flow through to those ports that match outgoing requests.

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Join the Asterisk Community at the 13th AstriCon, September 27-29, 2016
http://www.asterisk.org/community/astricon-user-conference

New to Asterisk? Start here:
https://wiki.asterisk.org/wiki/display/AST/Getting+Started

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George JosephDigium, Inc. | Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
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