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KLIENT 
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Windows 
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hostname
netsh interface ipv4 show config name="Ethernet"  
ping 8.8.8.8
netsh interface ipv4 set address name="Ethernet" source=dhcp
netsh interface ipv4 show config name="Ethernet"  
ping 8.8.8.8
netsh interface ipv4 set address name="Ethernet" source=static address=10.0.0.2 mask=255.255.255.0 gateway=10.0.0.1
netsh interface ipv4 set dns name="Ethernet" static 8.8.8.8 
ping 8.8.8.8
ping 10.0.0.1 
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Linux
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%sieć jako NAT
ip a
ping 8.8.8.8
%zmiana ustawień virtual boxa na siec wewnetrzną
ip link set enp0s3 down
#zmiana w GUI adresu IP na ręczny 10.0.0.3/24 brama 10.0.0.1 DNS 10.0.0.1,8.8.8.8
ip link set enp0s3 up  
ip a
%2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:ac:cc:8a brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.3/24 brd 10.0.0.255 scope global dynamic noprefixroute enp0s3
       valid_lft 43013sec preferred_lft 43013sec
    inet6 fe80::57b3:7b8b:af17:91cc/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
ping server
ping 10.0.0.1 
ping 8.8.8.8 
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SERVER
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Windows 
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ping 8.8.8.8
 hostname 
netsh interface ipv4 show config  
netsh interface set interface "Ethernet" enable  
netsh interface set interface "Ethernet" disable 
netsh interface set interface name="Ethernet 2" newname="LAN"
netsh interface set interface name="Ethernet" newname="WAN"
netsh interface ipv4 show config name="LAN" 
netsh interface ipv4 set address name="WAN" source=dhcp
netsh interface ipv4 set dnsservers name"LAN" static 10.0.0.1
netsh interface ipv4 set address name="LAN" source=static address=10.0.0.1 mask=255.255.255.0 gateway=10.0.0.1
ping 10.0.0.3
Set-DnsClientServerAddress -InterfaceIndex 5 -ServerAddresses ("10.0.0.1","8.8.8.8")
Get-NetAdapter 
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Linux~~~~~~~~~~~~~~~~~~~~~~~~~~~~https://www.2daygeek.com/enable-disable-up-down-nic-network-interface-port-linux/
sudo -i
#ip a
%#karty sieciowe enp0s3 i enp0s8 umownie WAN LAN obie na początku NAT
%wyłączenie karty WAN
ip link set enp0s3 down
%włączenie karty WAN
ip link set enp0s8 up

%lub ifconfig enp0s3 down %lub synonim  ifdown [NIC_NAME]  ifup [NIC_NAME]
%uzyskujemy komunikat ping connect: Network unreachable
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%edycja netplan
#nano /etc/netplan/00-installer-config.yaml
%dopisać po dhcp4:true 
enp0s8:
dhcp4:true
CRTL+X zapisać
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netplan try
ENTER 
ip link set enp0s8 down
ip link set enp0s8 up
ping 8.8.8.8
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