WireGuard路由配置问题：curl无法解析主机域名

我现在碰到个WireGuard的配置难题，具体情况如下：

1. 我有一台VPS1，IP示例是100.100.100.100，它的wgp2.conf配置内容如下：

[Interface]
PrivateKey = vps1.priv
Address = 20.0.20.1/24
DNS = 8.8.8.8, 1.1.1.1, 1.0.0.1

[Peer]
PublicKey = vps2.pub
AllowedIPs = 20.0.20.3/32
Endpoint = 200.200.200.200:51821
PersistentKeepalive = 20

2. 还有一台VPS2，IP示例是200.200.200.200，对应的wgp1.conf配置是：

[Interface]
PrivateKey = vps2.priv
Address = 20.0.20.3/24  
ListenPort = 51821
DNS = 8.8.8.8, 1.1.1.1, 1.0.0.1

[Peer]
PublicKey = vps1.pub
AllowedIPs = 20.0.20.1/32

3. IP规则相关设置：

• VPS1已经启用了IP转发
• VPS2也启用了IP转发
• VPS2上的iptables规则（通过执行sudo iptables -S && sudo iptables -t nat -S查看）如下：

-P FORWARD ACCEPT 
-P OUTPUT ACCEPT 
-A FORWARD -i wgp1 -j ACCEPT 
-A FORWARD -o wgp1 -j ACCEPT 
-P PREROUTING ACCEPT 
-P INPUT ACCEPT 
-P OUTPUT ACCEPT 
-P POSTROUTING ACCEPT 
-A POS...

备注：内容来源于stack exchange，提问作者bob bobston