disable ipv6

Dodajemy w /etc/sysctl.conf (nazwy interfejsów w zależności jakie mamy):

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.enp1s0.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.wlp2s0.disable_ipv6 = 1

Na koniec wczytujemy i sprawdzamy:

sysctl -p

ip a
1: lo: 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
2: enp1s0: mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether d4:5d:df:02:40:f5 brd ff:ff:ff:ff:ff:ff
3: wlp2s0: mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 74:e5:f9:1d:37:38 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.23/24 brd 192.168.1.255 scope global dynamic noprefixroute wlp2s0
valid_lft 62659sec preferred_lft 62659sec