iptables v1.8.9 (legacy): can’t initialize iptables table `filter’: Table does not exist (do you need to insmod?)

尝试在almalinux-9-x86_64系统使用docker来部署wireguard，

docker和docker-compose安装好之后执行下面的部署配置：

version: '3.3'
services:
  wireguard:
    image: lscr.io/linuxserver/wireguard:latest
    container_name: wireguard
    cap_add:
      - NET_ADMIN
      - SYS_MODULE #optional
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
      - SERVERURL=wireguard.domain.com #optional
      - SERVERPORT=51820 #optional
      - PEERS=1 #optional
      - PEERDNS=auto #optional
      - INTERNAL_SUBNET=10.13.13.0 #optional
      - ALLOWEDIPS=0.0.0.0/0 #optional
      - PERSISTENTKEEPALIVE_PEERS= #optional
      - LOG_CONFS=true #optional
    volumes:
      - /path/to/appdata/config:/config
      - /lib/modules:/lib/modules #optional
    ports:
      - 51820:51820/udp
    sysctls:
      - net.ipv4.conf.all.src_valid_mark=1
    restart: unless-stopped

执行完部署之后发现启动似乎正常，配置也都出来了，客户端尝试连接发现只有发送数据，没有接收数据。

再仔细看应用启动日志发现以下错误：

iptables v1.8.9 (legacy): can't initialize iptables table `filter': Table does not exist (do you need to insmod?)

执行下面命令解决问题：

sudo modprobe ip_tables
sudo echo 'ip_tables' >> /etc/modules

参考资料：

https://github.com/linuxserver/docker-wireguard

https://stackoverflow.com/questions/21983554/iptables-v1-4-14-cant-initialize-iptables-table-nat-table-does-not-exist-d