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<p class="MsoNormal"><span style="font-size:11.0pt">Hello Alex ,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks for the nice info .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I will consider what you said .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Alex Rousskov <rousskov@measurement-factory.com><br>
<b>Date: </b>Monday, May 2, 2022 at 8:38 AM<br>
<b>To: </b>Ahmad Alzaeem <0xff1f@gmail.com>, Squid Users <squid-users@lists.squid-cache.org><br>
<b>Subject: </b>Re: [squid-users] squid5 Happy Eyeballs - Is it possible to enable IPV4 only or IPV6 only ?<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:11.0pt">On 5/1/22 23:49, Ahmad Alzaeem wrote:<br>
<br>
> sometime the IPV4 <br>
> instance receive DNS resolution of the destination as IPV6 and the <br>
> connection fails !!<br>
> <br>
> sometimes the IPV4 instance receive the DNS resolution of the <br>
> destination as IPV6 and the connection fail .<br>
> <br>
> Is there any option we can do based on the environment above ?<br>
<br>
<br>
Without Squid code modifications, your options are:<br>
<br>
* Use a custom DNS resolver (configuration) that never sends IPv4 <br>
address records to an IPv6-only Squid. Use a custom DNS resolver <br>
(configuration) that never sends IPv6 address records to an IPv4-only <br>
Squid. Configure each Squid to use the right resolver (see dns_nameservers).<br>
<br>
* Disable IPv6 support in IPv4-only Squid at ./configure time. This does <br>
not help with the IPv6-only Squid and has other negative side effects. I <br>
do not recommend this option.<br>
<br>
<br>
> Like maybe we disable eyeballs or preserving it while add an option<br>
> like DNS A records or DNS AAAA records .<br>
<br>
It would be possible to enhance Squid by adding a configuration option <br>
that disables (certain) A or AAAA queries, but proper modifications are <br>
not trivial and nobody has done them yet: <br>
<a href="https://wiki.squid-cache.org/SquidFaq/AboutSquid#How_to_add_a_new_Squid_feature.2C_enhance.2C_of_fix_something.3F">https://wiki.squid-cache.org/SquidFaq/AboutSquid#How_to_add_a_new_Squid_feature.2C_enhance.2C_of_fix_something.3F</a><br>
<br>
<br>
Cheers,<br>
<br>
Alex.<o:p></o:p></span></p>
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