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This is all kinds of confusing. You're configuring DHCP on a
machine<br>
named 'yellow' who's address is 10.1.1.2 and has a gateway of
10.1.1.1.<br>
Yet 'yellow' has a WAN connection?<br>
<br>
You've configured DHCP for subnet 10.1.1.0/24 which is on interface<br>
'enp4s5' which IS NOT UP. Can you ping anything on the LAN?<br>
<br>
Is 'yellow' the internet gateway?<br>
<br>
Also your DHCP configuration:<br>
<font color="#993300"><tt> host yellow {</tt><tt><br>
</tt><tt> hardware ethernet f0:7d:24:c2:c4:13;</tt><tt><br>
</tt><tt> fixed-address 10.1.1.1;</tt><tt><br>
</tt><tt> }</tt><tt><br>
</tt><tt> </tt></font>^^You're defining 'yellow' (which is the
DHCP server!!) and it has a<br>
different address that the one you defined in <font face="Arial">/etc/network/interfaces!!</font><br>
<font color="#993300"><tt>iface enp4s5 inet static<br>
address 10.1.1.2/24</tt><tt><br>
</tt></font><br>
Don't define host 'yellow' in the DHCP configuration. Add a comment
if<br>
you like.<br>
<br>
You need to figure out which 10.1.1.0/24 address 'yellow' is
supposed to<br>
have and bring up interface 'enp4s5'.<br>
<br>
Is 'yellow' the gateway for 10.1.1.0/24? Your '<font
color="#993300">option routers 10.1.1.1</font>'<br>
says it's not.<br>
<br>
Bill<br>
<br>
<div class="moz-cite-prefix">On 1/27/2018 5:57 AM, Simon Hobson
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:E0B3AA68-C71D-49CF-9519-D4F1431EEC6D@thehobsons.co.uk">
<pre wrap="">A <a class="moz-txt-link-rfc2396E" href="mailto:publicface@bak.rr.com"><publicface@bak.rr.com></a> wrote:
</pre>
<blockquote type="cite">
<blockquote type="cite">
<pre wrap="">Also in your first post:
subnet 10.1.1.0 netmask 255.255.255.0 {
interface wlp2s0;
option domain-name-servers 10.1.1.1;
max-lease-time 7200;
default-lease-time 600;
range 10.1.1.10 10.1.1.250;
option subnet-mask 255.255.255.0;
option broadcast-address 10.1.1.255;
option routers 10.1.1.1;
As far as I know there is no interface directive. Plus wlp2s0 is the wrong
interface. You should remove that line.
</pre>
</blockquote>
<pre wrap="">
Wrong name for the device? Or just shouldn't be the wireless interface? Why is it wrong?
</pre>
</blockquote>
<pre wrap="">
There is no instruction in dhcpd.conf called "interface". The example you found probably had it as a comment to help the person keep track of what is where.
</pre>
<blockquote type="cite">
<pre wrap="">If that's not how to specify the interface for that subnet, then what is the proper way please?
</pre>
</blockquote>
<pre wrap="">
You don't ! It happens automagically, and bear in mind that a subnet served by a DHCP server does NOT have to be directly connected - it can come via a relay agent.
The server uses the IP address(es) of the interface for directly connected clients, or the Gateway Interface Address (GIAddr) field inserted by a relay agent if the client is remote (the other side of a router). That address is used to determine which subnet a client is connected to.
</pre>
<blockquote type="cite">
<blockquote type="cite">
<pre wrap="">What does 'ip -4 -o addr' show?
</pre>
</blockquote>
<pre wrap=""># ip -4 -o addr
1: lo inet 127.0.0.1/8 scope host lo\ valid_lft forever preferred_lft forever
3: enp6s0 inet xx.xx.xx.xx/20 brd 255.255.255.255 scope global enp6s0\ valid_lft forever preferred_lft forever
</pre>
</blockquote>
<pre wrap="">
OK, you do not have IPv4 addresses on any internal interface ! it isn't going to work like that. Or have you deleted lines from that output thinking they aren't relevant ?
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</pre>
</blockquote>
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