<div dir="ltr"><div>Hi Laci,</div><div>Here it goes:</div><div><span style="font-family:monospace">root@localhost:~# /usr/sbin/syslog-ng -Fvde $SYSLOGNG_OPTS --cfgfile=/etc/syslog-ng/mgmt-syslog-ng.conf --pidfile=/var/lib/syslog-ng/mgmt-syslog-ng.pid --persist-file=/var/lib/syslog-ng/mgmt-syslog-ng.persist --control=/var/lib/syslog-ng/mgmt-syslog-ng.ctl --version<br>syslog-ng 3 (3.19.1)<br>Config version: 3.19<br>Installer-Version: 3.19.1<br>Revision: 3.19.1-5<br>Compile-Date: May 19 2019 11:03:30<br>Module-Directory: /usr/lib/syslog-ng/3.19<br>Module-Path: /usr/lib/syslog-ng/3.19<br>Include-Path: /usr/share/syslog-ng/include<br>Available-Modules: affile,hook-commands,basicfuncs,afuser,csvparser,date,pseudofile,confgen,json-plugin,linux-kmsg-format,cef,system-source,syslogformat,afsql,appmodel,http,kvformat,afprog,afsocket,afmongodb,sdjournal,cryptofuncs,disk-buffer,dbparser<br>Enable-Debug: off<br>Enable-GProf: off<br>Enable-Memtrace: off<br>Enable-IPv6: on<br>Enable-Spoof-Source: on<br>Enable-TCP-Wrapper: on<br>Enable-Linux-Caps: on<br>Enable-Systemd: on</span></div><div><br></div><div>Thanks, Alex<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Aug 28, 2020 at 11:58 AM Laszlo Szemere (lszemere) <<a href="mailto:Laszlo.Szemere@oneidentity.com">Laszlo.Szemere@oneidentity.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">




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Hello Alex,</div>
<div style="font-family:Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
 Syslog-ng can be compiled with or without IPv6 support. As a first step please verify if it was compiled that way.</div>
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<br>
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 If you start Syslog-ng with the "--version" option it will print a little debug information about itself. <span style="color:rgb(0,0,0);font-family:Arial,Helvetica,sans-serif;font-size:12pt">Among other options there w</span><span style="color:rgb(0,0,0);font-family:Arial,Helvetica,sans-serif;font-size:12pt">ill be
 a line: "Enable-IPv6"</span></div>
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<span style="color:rgb(0,0,0);font-family:Arial,Helvetica,sans-serif;font-size:12pt"><br>
</span></div>
<div style="font-family:Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span style="color:rgb(0,0,0);font-family:Arial,Helvetica,sans-serif;font-size:12pt"> (If it was compiled with "Enable-IPv6: on", please copy the entire output here. It will help with the later investigation.)</span></div>
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<span style="color:rgb(0,0,0);font-family:Arial,Helvetica,sans-serif;font-size:12pt">Best regards,</span></div>
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<span style="color:rgb(0,0,0);font-family:Arial,Helvetica,sans-serif;font-size:12pt">Laci</span></div>
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<div id="gmail-m_-3691999137277853748divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> syslog-ng <<a href="mailto:syslog-ng-bounces@lists.balabit.hu" target="_blank">syslog-ng-bounces@lists.balabit.hu</a>> on behalf of Alexandre Santos <<a href="mailto:alexandre.rosas.santos@gmail.com" target="_blank">alexandre.rosas.santos@gmail.com</a>><br>
<b>Sent:</b> Friday, August 28, 2020 12:35<br>
<b>To:</b> Syslog-ng users' and developers' mailing list <<a href="mailto:syslog-ng@lists.balabit.hu" target="_blank">syslog-ng@lists.balabit.hu</a>><br>
<b>Subject:</b> [syslog-ng] No remote logging with hostname which has address is IPv6</font>
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<span style="color:rgb(156,101,0);font-weight:bold">CAUTION:</span> This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.</div>
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<div>Hi,</div>
<div><br>
</div>
<div>I have configuration, which is sending log messages to a remote hostname (dns6server). The particularity of this remote server is that it is resolved to an IPv6 address.</div>
<div><br>
</div>
<div>ping works fine:</div>
<div><span style="font-family:monospace">root@localhost:~# ping dns6server -c 3<br>
PING dns6server(2620:38:4::8:4000:238) 56 data bytes<br>
64 bytes from 2620:38:4::8:4000:238: icmp_seq=1 ttl=63 time=0.354 ms<br>
64 bytes from 2620:38:4::8:4000:238: icmp_seq=2 ttl=63 time=0.264 ms<br>
64 bytes from 2620:38:4::8:4000:238: icmp_seq=3 ttl=63 time=0.310 ms</span></div>
<div><br>
</div>
<div>But syslog-ng seems not to be able to resolve the ipv6 address:</div>
<div>
<p style="margin:0cm 0cm 0.0001pt"><span style="font-family:monospace"><font size="2"><span>Aug 27 20:58:37 localhost systemd[1]: mgmt-syslog-ng.service: Succeeded.<span></span></span></font></span></p>
<span style="font-family:monospace"><font size="2"></font></span>
<p style="margin:0cm 0cm 0.0001pt"><span style="font-family:monospace"><font size="2"><span>Aug 27 20:58:37 localhost systemd[1]: Stopped External Logger Daemon.<span></span></span></font></span></p>
<span style="font-family:monospace"><font size="2"></font></span>
<p style="margin:0cm 0cm 0.0001pt"><span style="font-family:monospace"><font size="2"><span>Aug 27 20:58:37 localhost systemd[1]: Starting External Logger Daemon...<span></span></span></font></span></p>
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<p style="margin:0cm 0cm 0.0001pt"><span style="font-family:monospace"><font size="2"><span>Aug 27 20:58:37 localhost ip[32709]: [2020-08-27T20:58:37.841389] WARNING: With use-dns(no), dns-cache() will be forced to 'no' too!;<span></span></span></font></span></p>
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<p style="margin:0cm 0cm 0.0001pt"><span style="font-family:monospace"><font size="2"><span>Aug 27 20:58:46 localhost ip[32709]: [2020-08-27T20:58:46.854714] Error resolving hostname; host='dns6server'<span></span></span></font></span></p>
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<p style="margin:0cm 0cm 0.0001pt"><span style="font-family:monospace"><font size="2"><span>Aug 27 20:58:46 localhost ip[32709]: [2020-08-27T20:58:46.854758] Initiating connection failed, reconnecting; time_reopen='60'<span></span></span></font></span></p>
<span style="font-family:monospace"><font size="2"></font></span>
<p style="margin:0cm 0cm 0.0001pt;font-size:11pt"><span style="font-family:monospace"><span style="font-size:8pt"><font size="2">Aug 27 20:58:46 localhost systemd[1]: Started External Logger Daemon.</font></span></span></p>
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<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif"><br>
</span></font></span></p>
<p style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">
<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif">Any Ideas?<br>
</span></font></span></p>
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<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif"><br>
</span></font></span></p>
<p style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">
<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif">I am sending the configuration and debug log in attachment.<br>
</span></font></span></p>
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<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif"><br>
</span></font></span></p>
<p style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">
<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif">Thanks in Advance,</span></font></span></p>
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<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif">Alex<br>
</span></font></span></p>
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<span style="font-size:8pt;font-family:Consolas"><font size="2"><span style="font-family:arial,sans-serif"></span></font><span></span></span></p>
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