RE: How to fix 'no route to host' problem

That is, either using network manager or whatever method you desire (including editing /etc/network/interfaces, see below) and setting it to not use DHCP but to have a static address.

Then, if it is alive, it should always be at that IP address.  Just make sure DHCP never allocates a new host there.

Here’s the syntax for making static in interfaces file:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto eth2
iface eth2 inet static
      address 192.168.0.149
      netmask 255.255.255.0

-------end---

You may have to fiddle with <something> to get the name of the Ethernet device right (or static), including hacking around with udev rules….  Especially since eth0 went away recently, being replaced with wonderful names like enp3s0…  (I understand the logic, but sometimes I want the first Ethernet device to be eth0, period.  NO funny enp3s0/1/2/3 enp4s1 stuff… but I digress!)

And, I’m NOT going to even MENTION the totally sick hack of finding the actual IP address that the host got from DHCP by using broadcast ping from a different host… ;-)

Rusty

From: PLUG-discuss [mailto:plug-discuss-bounces@lists.phxlinux.org] On Behalf Of Michael Butash
Sent: Tuesday, October 30, 2018 2:14 PM
To: PLUG Phoenix List
Cc: joe@actionline.com
Subject: Re: How to fix 'no route to host' problem

If you can't ping it, see no arp on your local network, or "no route to host", it's not there on that ip any more.  Doesn't mean it didn't get another ip address different as recommended above to static your dhcp, but it's not on that IP any longer.

I like to do "nmap -sP 192.168.1.0/24<http://192.168.1.0/24>" or whatever your subnet is there, and see what comes back for what lives there, if name resolution is present, or mdns capable, you should see names.  It probably just got a new lease.

-mb

On Tue, Oct 30, 2018 at 7:17 AM Stephen Partington <cryptworks@gmail.com<mailto:cryptworks@gmail.com>> wrote:
DHCP IP Address reservation or Assignments in your router will be a bit odd looking in most home routers, but once you find it very simple. This will still vary based on device but an example can be found here. https://www.linksys.com/us/support-article?articleNum=135673

On Mon, Oct 29, 2018 at 8:21 PM Joe Lowder <joe@actionline.com<mailto:joe@actionline.com>> wrote:
I still need help to solve this problem:

I recently wrote this:

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