The way I would have done it it to make all systems that act as servers have a fixed IP address. Then systems connecting to them can use that IP address (preferably an entry in /etc/hosts).

First check what range of addresses your DHCP server can hand out (eg 192.168.1.2 to 192.168.1.200). Then give the server an IP address that's not in that range. You get problems if two systems try to use the same IP address.

Or configure the DHCP server to give the relevant system a fixed IP address.

You may not need this advice now, but someone else might find it useful.

Chris

Hi
Thanks
But I believe there was some defect in wicd!

First check what range of addresses your DHCP server can hand out (eg 192.168.1.2 to 192.168.1.200). Then give the server an IP address that's not in that range. You get problems if two systems try to use the same IP address.

Or configure the DHCP server to give the relevant system a fixed IP address.

You may not need this advice now, but someone else might find it useful.

Chris

On Devuan Apt-cache-ng Sever:

apt install network-manager-gnome
apt remove wicd
apt autoremove

All is well that ends well...

Thankyou all for your kind input!

6. Theres also another difference in the two configurations, as I can explore:
a. In Debian I have by default installed: network-manager
b. In Devuan I have by default installed: wicd

Thankyou

5. From the same machine ie vmdevuanr1:

ping -c2 vmdevuanr1

... Works

host vmdevuanr1

... Fails

To make it work the client needs to know what IP address vmdevuanr1 has. The server will know it's own IP address, probably as 127.0.0.1, so it will work there. The client needs to either have it edited into /etc/hosts when necessary (tedious manual work) or to be able to look it up in DNS.

What does /etc/resolv.conf contain? Mine contains:

nameserver 192.168.1.1

Which tells the system to ask my internet router (at 192.168.1.1) to resolve IP addresses. Try using your router as a DNS server as well as DHCP server. If it's already your DNS server look at it's admin screens to see if there's an option for it to resolve addresses it's handed out by DHCP. Or you may need to add a suffix to vmdevuanr1 in /etc/apt/apt.conf.d/proxy

Chris

Hi
1. Both my client and server contain:

nameserver 192.168.1.1

2. But under the same configuration; the debian server is giving the service: do I need to probe into the Router?

3. If you are running the same service via apt-cacher-ng; does it works for your client machines?

4. The ping and host commands work for both my debian machines!

Thankyou

What does /etc/resolv.conf contain? Mine contains:

nameserver 192.168.1.1

Which tells the system to ask my internet router (at 192.168.1.1) to resolve IP addresses. Try using your router as a DNS server as well as DHCP server. If it's already your DNS server look at it's admin screens to see if there's an option for it to resolve addresses it's handed out by DHCP. Or you may need to add a suffix to vmdevuanr1 in /etc/apt/apt.conf.d/proxy

Chris

Presumably, as implied by your initial note "... It worked fine in Debian.", you are also running a DHCP/DNS service combination, such that the DHCP server upon serving an IP for vmdevuanr1 registers that host name appropriately with the DNS service, so that other hosts should be able to resolve it? Which DHCP/DNS service combination are you using?

Hi
It is a simple internet DHCP router. I am using it in default, no such special configurations!

Actually I tested this all system, and had no issue in Debian. So I went on to test on Devuan.

I also tested one more configuration: use apt-chacher-ng for the server access to the media. Strangely, for server itself, it works, for both Debian and Devuan! But for devuan client to server fails.

Thankyou

Try ping vmdevuanr1 and host vmdevuanr1 on the system you ran apt update on.
(The "Could not resolve 'vmdevuanr1'" message sounds as if it is the key problem.)

Chris

Hi
ping vmdevuanr1

ping: vmdevaunr1: Name or service not known

host vmdevuanr1

Host vmdevaunr1 not found: 3(NXDOMAIN)

@neutron_stz: Actually I want it to be not hardbinded, as I am using a dhcp server. As IP changes, then I have to re-edit again!

Thankyou

192.168.15.235 vmdevuanr1

and try again with hostname instead of ip

Chris

My other settings are:

Client Machine:

cat /etc/apt/apt.conf.d/proxy
#Acquire::http { Proxy "http://192.168.15.235:3142"; }
#Acquire::http { Proxy "http://vmdevuanr1:3142"; }
Acquire::http { Proxy "http://vmdevuanr1:3142"; }

... It works with the static address only!

Output of apt update is by using:

apt update &> output.txt

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Err:1 http://packages.devuan.org/merged ascii InRelease
  Could not resolve 'vmdevuanr1'
Err:2 http://auto.mirror.devuan.org/merged ascii-security InRelease
  Could not resolve 'vmdevuanr1'
Err:3 http://auto.mirror.devuan.org/merged ascii-updates InRelease
  Could not resolve 'vmdevuanr1'
Err:4 http://auto.mirror.devuan.org/merged ascii InRelease
  Could not resolve 'vmdevuanr1'
Reading package lists...
Building dependency tree...
Reading state information...
All packages are up to date.
W: Failed to fetch http://auto.mirror.devuan.org/merged/dists/ascii-security/InRelease  Could not resolve 'vmdevuanr1'
W: Failed to fetch http://auto.mirror.devuan.org/merged/dists/ascii-updates/InRelease  Could not resolve 'vmdevuanr1'
W: Failed to fetch http://auto.mirror.devuan.org/merged/dists/ascii/InRelease  Could not resolve 'vmdevuanr1'
W: Failed to fetch http://packages.devuan.org/merged/dists/ascii/InRelease  Could not resolve 'vmdevuanr1'
W: Some index files failed to download. They have been ignored, or old ones used instead.

Thankyou

post contents of /etc/hostname and /etc/hosts

Hi
Server Files:

1. 
vmdevuanr1
2.
127.0.0.1	localhost
127.0.1.1	vmdevuanr1

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Client Files:

1.
vmdevuanbeta
2.
127.0.0.1	localhost
127.0.1.1	vmdevuanbeta

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Thankyou