Temporary failure in name resolution

[MikeSPROW]

Hi,
I have just install proxmox for the first time but i have an issues because dns resolution.
root@SL-LAB01:~ ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether ec:b1:d7:63:54:5d brd ff:ff:ff:ff:ff:ff inet 172.16.1.1/24 brd 172.16.1.255 scope global eno1 valid_lft forever preferred_lft forever inet6 fe80::eeb1:d7ff:fe63:545d/64 scope link valid_lft forever preferred_lft forever 3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether e0:9d:31:ae:aa:10 brd ff:ff:ff:ff:ff:ff

root@SL-LAB01:~# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=115 time=9.78 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=115 time=9.76 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=115 time=9.71 ms ^C --- 8.8.8.8 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 5ms rtt min/avg/max/mdev = 9.706/9.751/9.784/0.087 ms root@SL-LAB01:~# ping google.com ping: google.com: Temporary failure in name resolution

root@SL-LAB01:~# cat /etc/resolv.conf search cyc.local nameserver 1.1.1.1 nameserver 1.0.0.1 nameserver 8.8.8.8
if somebody have a good solution for me.
Thanks a lot

I have other server on the same network and he dont have any problem.

 

[Moayad]

Hi,

Try this command

dhclient -f -n

 

[MikeSPROW]

root@SL-LAB01:~# dhclient -f -n Internet Systems Consortium DHCP Client 4.4.1 Copyright 2004-2018 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Unknown command: -f Usage: dhclient [-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT] [--dad-wait-time <seconds>] [--prefix-len-hint <length>] [--decline-wait-time <seconds>] [--address-prefix-len <length>] [-s server-addr] [-cf config-file] [-df duid-file] [-lf lease-file] [-pf pid-file] [--no-pid] [-e VAR=val] [-sf script-file] [interface]* dhclient {--version|--help|-h} If you think you have received this message due to a bug rather than a configuration issue please read the section on submitting bugs on either our web page at www.isc.org or in the README file before submitting a bug. These pages explain the proper process and the information we find helpful for debugging. exiting.

I dont have any dhcp on this network

 

[Moayad]

then check if the firewall is running and post your network config please

 

[MikeSPROW]

firewall is disable, my network config is 172.16.1.0/24 gateway 172.16.1.254/24,, my proxmox ip is 172.16.1.1, i have a ubuntu client on 172.16.1.253 and its work fine with the same dns config.

EDIT:
I have change my hypervisor of network and now it run i dont now why my ubiquiti ER-X block dns request from him.