title: I want to resolve errors that occurred on Asterisk sip server
body: <p>Nice to meet you<br>
  <br>
  I am building a SIP server using Asterisk.<br>
  The environmental composition is as follows.<br>
  <br>
  =================================================<br>
   -- SIP Server--<br>
  Asterisk 15.6.1 built by root @ taka-machine-9010 on a x86_64 running Linux on 2018-11-09 06:20:43 UTC<br>
  Linux version 4.15.0-38-generic (buildd@lcy01-amd64-023) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #41-Ubuntu SMP Wed Oct 10 10:59:38 UTC 2018<br>
  <br>
   -- SIP Client --<br>
  Phone version: Zoiper5 5.2.19 for Windows 64bit<br>
  Microsoft Windows [Version 10.0.17134.345]<br>
  =================================================<br>
  <br>
  In this environment, attempting to connect to the server from the client will result in "SIP UDP Not found".<br>
  Please tell me the cause and solution.<br>
  <br>
  For TCP communication at error occurrence, Wireshark is capturing. Capture content and Asterisk settings are in the following ZIP file.<br>
  <br>
  <a href="https://ufile.io/73jev" rel="nofollow noreferrer">https://ufile.io/73jev</a><br>
  <br>
  ; sip.conf<br>
  [general]<br>
  context=default<br>
  transport=udp<br>
  port=5060<br>
  udpbindaddr=0.0.0.0<br>
  language=ja<br>
  localnet=192.168.104.0/255.255.255.0<br>
  domain=192.168.104.113<br>
  <br>
  [201]<br>
  type=friend<br>
  username=201<br>
  secret=p@w0ssRd<br>
  host=dynamic<br>
  canreinvite=no<br>
  <br>
  [202]<br>
  type=friend<br>
  username=202<br>
  secret=p@w0ssRd<br>
  host=dynamic<br>
  canreinvite=no<br>
  <br>
  [203]<br>
  type=friend<br>
  username=203<br>
  secret=p@w0ssRd<br>
  host=dynamic<br>
  canreinvite=no<br>
  <br>
  <br>
  ; extensions.conf<br>
  [default]<br>
  ;<br>
  ; By default we include the demo.  In a production system, you<br>
  ; probably don't want to have the demo there.<br>
  ;<br>
  ;include => demo<br>
  exten => 201,1,Dial(SIP/201,30,r)<br>
  exten => 201,2,Hangup()<br>
  <br>
  exten => 202,1,Dial(SIP/202,30,r)<br>
  exten => 202,2,Hangup()<br>
  <br>
  exten => 203,1,Answer()<br>
  exten => 203,2,Playback(hello-world)<br>
  exten => 203,3,Hangup()<br>
  <br></p>