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<div dir="ltr">Probably helpful if you provided your configuration. </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dnsmasq-discuss <dnsmasq-discuss-bounces@lists.thekelleys.org.uk> on behalf of Michel DIEMER via Dnsmasq-discuss <dnsmasq-discuss@lists.thekelleys.org.uk><br>
<b>Sent:</b> Wednesday, December 13, 2023 11:28:03 AM<br>
<b>To:</b> dnsmasq-discuss@lists.thekelleys.org.uk <dnsmasq-discuss@lists.thekelleys.org.uk><br>
<b>Subject:</b> [Dnsmasq-discuss] DNSMasq as secondary server</font>
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<span style="color:rgb(0,0,0)">Dear dnsmasq user,</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">I have a domain let's claim that it is somedomain.com</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">I own that domain and it is officially registred and the name servers for that domain are on the Internet.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">There is a physical server with two network interfaces, one connected to the Internet and one connected to the local network.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">dnsmasq is running on that server.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">My ISP does not support IPv6. IPv6 is not disabled but not properly configured. IPv4 is configured.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">The web ports (80 and 443) are redirected to the web server of the local network. Only the server with dnsmasq and the web server are accessible from the Internet. Other computers are not and should not.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">So when I type "https://</span><span style="border:0px; color:rgb(51,51,51); font-family:helvetica neue,helvetica,arial,sans-serif; font-feature-settings:normal; font-kerning:auto; font-stretch:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-numeric:normal; line-height:normal; margin:auto; padding:0px">somedomain.com"
from any web browser, from the local network or from the Internet, the website is loaded from the internet server on the local network.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">Now I have several computers on the local network and dnsmasq is configured for the domain "somedomain.com".</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">The domain of the localnetwork is "somedomain.com".</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">Now when I ping a computer on the Interneet from the local network it is working fine, using some publc DNS.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">The problem is when I want to "ping somecomputer.somedimain.com".</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">If "somecomputer" is on the lan I want dnsmasq to give the private, local IP address.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">If "somecomputer" is not on the lan, dnsmasq may use the public name server as anyone who is on the Internet.</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="border:0px; color:rgb(51,51,51); font-family:helvetica neue,helvetica,arial,sans-serif; font-feature-settings:normal; font-kerning:auto; font-stretch:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-numeric:normal; line-height:normal; margin:auto; padding:0px">"ping
computer1.somedomain.com" -> local IP address, fine<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; line-height:normal; margin:auto; padding:0px">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; line-height:normal; margin:auto; padding:0px">
"ping computer2.somedomain.com" -> tries to find computer2 on the WAN using the public IPv4 address. Not working. dnsmasq should find computer2.<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; line-height:normal; margin:auto; padding:0px">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; line-height:normal; margin:auto; padding:0px">
"ping somedomain.com" -> should return either the public Internet IP address of the domain or the local IP address of the local dns server. Works fine from Internet but not from the internal network.<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; line-height:normal; margin:auto; padding:0px">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; line-height:normal; margin:auto; padding:0px">
"ping google.fr" -> works find, using public DNS</span><br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<br style="font-variant-numeric:normal; font-variant-east-asian:normal; font-variant-alternates:normal; font-kerning:auto; font-feature-settings:normal; font-stretch:normal; font-size:12px; line-height:normal; font-family:"Helvetica Neue",Helvetica,Arial,sans-serif; margin:auto; padding:0px; color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">If it is not supposed to work I will replace dnsmasq setting from domain=somedomain.com to domain=lan.</span><span style="border:0px; color:rgb(51,51,51); font-family:helvetica neue,helvetica,arial,sans-serif; font-feature-settings:normal; font-kerning:auto; font-stretch:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-numeric:normal; line-height:normal; margin:auto; padding:0px">somedomain.com
or domain=somedomain.lan. Except the web server, other computers on the local network are not supposed to be visible from the Internet.</span></div>
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