对我来说，我在使用podman时遇到了与redhat/centos/fedora用户相同的问题

firewall-cmd --zone=public --add-masquerade
firewall-cmd --permanent --zone=public --add-masquerade

对于更多的防火墙和podman(或docker) -容器中没有互联网，无法解析主机

如果你在OSX上，你可能需要在安装Docker后重新启动你的机器。这有时是一个问题。

我使用DOCKER_OPTS="——dns 8.8.8.8"，后来发现我的容器不能直接访问互联网，但可以访问我的公司内部网。我把DOCKER_OPTS改为如下:

DOCKER_OPTS="--dns <internal_corporate_dns_address"

替换internal_corporate_dns_address与我们的DNS的IP地址或FQDN和重启docker使用

sudo service docker restart

然后生成我的容器并检查它是否可以访问互联网。

我不知道我在做什么，但这对我很有用:

OTHER_BRIDGE=br-xxxxx # this is the other random docker bridge (`ip addr` to find)    
service docker stop

ip link set dev $OTHER_BRIDGE down
ip link set dev docker0 down
ip link delete $OTHER_BRIDGE type bridge
ip link delete docker0 type bridge
service docker start && service docker stop

iptables -t nat -A POSTROUTING ! -o docker0 -s 172.17.0.0/16 -j MASQUERADE
iptables -t nat -A POSTROUTING ! -o docker0 -s 172.18.0.0/16 -j MASQUERADE

service docker start

我使用的是Arch Linux，在尝试了以上所有的答案后，我意识到我的机器上启用了防火墙，nftables，并禁用它。我说:

sudo systemctl disable nftables
sudo systemctl stop nftables
sudo reboot

我的网卡:

➜  ~ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:f7:28:84:e7:fe brd ff:ff:ff:ff:ff:ff
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
    link/ether d0:7e:35:d2:42:6d brd ff:ff:ff:ff:ff:ff
4: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default 
    link/ether 02:42:43:3f:ff:94 brd ff:ff:ff:ff:ff:ff
5: br-c51881f83e32: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default 
    link/ether 02:42:ae:34:49:c3 brd ff:ff:ff:ff:ff:ff
6: br-c5b2a1d25a86: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default 
    link/ether 02:42:72:d3:6f:4d brd ff:ff:ff:ff:ff:ff
8: veth56f42a2@if7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP mode DEFAULT group default 
    link/ether 8e:70:36:10:4e:83 brd ff:ff:ff:ff:ff:ff link-netnsid 0

和我的防火墙配置，/etc/nftables.conf，我现在禁用了，将来会尝试改进，这样我就可以正确设置docker0网卡规则:

#!/usr/bin/nft -f
# vim:set ts=2 sw=2 et:

# IPv4/IPv6 Simple & Safe firewall ruleset.
# More examples in /usr/share/nftables/ and /usr/share/doc/nftables/examples/.

table inet filter
delete table inet filter
table inet filter {
  chain input {
    type filter hook input priority filter
    policy drop

    ct state invalid drop comment "early drop of invalid connections"
    ct state {established, related} accept comment "allow tracked connections"
    iifname lo accept comment "allow from loopback"
    ip protocol icmp accept comment "allow icmp"
    meta l4proto ipv6-icmp accept comment "allow icmp v6"
    #tcp dport ssh accept comment "allow sshd"
    pkttype host limit rate 5/second counter reject with icmpx type admin-prohibited
    counter
  }
  chain forward {
    type filter hook forward priority filter
    policy drop
  }

用OSX的答案更新这个问题(使用Docker Machine)

如果你使用Docker Machine在OSX上运行Docker，那么下面的方法对我来说是有效的:

docker-machine restart

<...wait for it to restart, which takes up to a minute...>

docker-machine env
eval $(docker-machine env)

然后(至少在我的经验中)，如果你从容器中ping google.com，一切都会很好。