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<p class="MsoNormal"><span lang="EN-US">I read tinc documentation part:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“<o:p></o:p></span></p>
<h4 style="margin:0cm;margin-bottom:.0001pt"><span style="font-size:13.5pt;color:black">For Branch A<o:p></o:p></span></h4>
<p style="margin:0cm;margin-bottom:.0001pt;orphans: auto;text-align:start;widows: 1;-webkit-text-stroke-width: 0px;word-spacing:0px">
<em><span lang="EN-US" style="font-size:13.5pt;color:black">BranchA</span></em><span class="apple-converted-space"><span lang="EN-US" style="font-size:13.5pt;color:black"> </span></span><span lang="EN-US" style="font-size:13.5pt;color:black">would be configured
like this:<o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;orphans: auto;text-align:start;widows: 1;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang="EN-US" style="font-size:13.5pt;color:black"><o:p> </o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:13.5pt;color:black">In<span class="apple-converted-space"> </span></span><samp><span lang="EN-US" style="font-size:13.5pt;color:black">/etc/tinc/company/tinc-up</span></samp><span lang="EN-US" style="font-size:13.5pt;color:black">:<o:p></o:p></span></p>
<pre><span lang="EN-US" style="color:black"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="color:black"># Real interface of internal network:<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"># ifconfig eth0 </span><b><span lang="EN-US" style="color:red">10.1.54.1</span></b><span lang="EN-US" style="color:black"> netmask </span><b><span lang="EN-US" style="color:red">255.255.0.0</span></b><span lang="EN-US" style="color:black"><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black">ifconfig $INTERFACE </span><b><span lang="EN-US" style="color:red">10.1.54.1</span></b><span lang="EN-US" style="color:black"> netmask </span><b><span lang="EN-US" style="color:red">255.0.0.0</span></b><span lang="EN-US" style="color:black"><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="color:black">…<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"><o:p> </o:p></span></pre>
<p style="margin:0cm;margin-bottom:.0001pt;orphans: auto;text-align:start;widows: 1;-webkit-text-stroke-width: 0px;word-spacing:0px">
<b><u><span lang="EN-US" style="font-size:13.5pt;color:red">Note that the IP addresses of eth0 and tap0 are the same. This is quite possible, if you make sure that the netmasks of the interfaces are different</span></u></b><span lang="EN-US" style="font-size:13.5pt;color:black">.
It is in fact recommended to give both real internal network interfaces and tap interfaces the same IP address, since that will make things a lot easier to remember and set up.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Can you explain best the last statement saying that real eth0 and tap0 can have some ip with different netmask ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Overlapping: 10.1.0.0 - 10.1.255.255 and 10.0.0.0 - 10.255.255.255<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cannot be arise conflicts ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If my internal network is 172.16.0.0/19 and I have eth0 ip = 172.16.1.10/255.255.224.0 and I set tun/tap ip = 172.16.1.10/255.0.0.0 I’ve<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">172.16.0.0 - 172.16.31.255 range network for eth0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">and<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">172.0.0.0 - 172.255.255.255 range network for tun/tap<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">How the system knows how to resolve this overlapping ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Doesn’t be the two networks totally independent (non overlapping) to allow correct routing ?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:navy;mso-fareast-language:IT">Roberto</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"AvantGarde Bk BT",serif;color:navy;mso-fareast-language:IT"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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