root@docker01:~# ping web.deping: web.de: Temporary failure in name resolutionroot@docker01:~# cat /etc/resolv.conf nameserver 8.8.8.8root@docker01:~# nslookup> web.deServer: 8.8.8.8Address: 8.8.8.8#53Non-authoritative answer:Name: web.deAddress: 82.165.229.83Name: web.deAddress: 82.165.229.138> exitroot@docker01:~# ping 82.165.229.83PING 82.165.229.83 (82.165.229.83) 56(84) bytes of data.64 bytes from 82.165.229.83: icmp_seq=1 ttl=245 time=22.4 ms^C--- 82.165.229.83 ping statistics ---1 packets transmitted, 1 received, 0% packet loss, time 0msrtt min/avg/max/mdev = 22.397/22.397/22.397/0.000 ms