问题： 有3个节点 A: 英国 B: 美国 C: 德国 . 要通过节点转发DNS 请求， 这样避免DNS请求被”墙“，或者被劫持。如何利用MosDns 配合Passwall 完成操作？

解决方案：

1： Passwall 开3个Socks 端口分别对应3个节点。 A： sock5: 1083 B: sock5:1084 C: sock5:1085 ， 并且修改配置文件 /etc/config/passwall

config acl_rule
        option enabled '1'
        option remarks 'L1'
        option interface 'L1'
        option sources '192.168.101.0/24'
        option tcp_no_redir_ports 'disable'
        option udp_no_redir_ports 'disable'
        option use_global_config '0'
        option tcp_node 'oCQMCVBg'
        option udp_node 'tcp'
        option tcp_proxy_drop_ports 'disable'
        option udp_proxy_drop_ports 'disable'
        option tcp_redir_ports '1:65535'
        option udp_redir_ports '1:65535'
        option use_direct_list '0'
        option use_proxy_list '0'
        option use_block_list '0'
        option use_gfw_list '0'
        option chn_list '0'
        option tcp_proxy_mode 'proxy'
        option udp_proxy_mode 'proxy'
        option dns_shunt 'dnsmasq'
        option dns_mode 'tcp'
        option dnsmasq_dns_redirect '0'
        option remote_dns '127.0.0.1:5135'

config acl_rule
        option enabled '1'
        option remarks 'L2'
        option interface 'L2'
        option sources '192.168.102.0/24'
        option tcp_no_redir_ports 'disable'
        option udp_no_redir_ports 'disable'
        option use_global_config '0'
        option tcp_node 'XxxWUfAC'
        option udp_node 'tcp'
        option tcp_proxy_drop_ports 'disable'
        option udp_proxy_drop_ports 'disable'
        option tcp_redir_ports '1:65535'
        option udp_redir_ports '1:65535'
        option use_direct_list '0'
        option use_proxy_list '0'
        option use_block_list '0'
        option use_gfw_list '0'
        option chn_list '0'
        option tcp_proxy_mode 'proxy'
        option udp_proxy_mode 'proxy'
        option dns_shunt 'tcp'
        option dns_mode 'tcp'
        option dnsmasq_dns_redirect '0'
        option remote_dns '127.0.0.1:5136'

config acl_rule
        option enabled '1'
        option remarks 'L3'
        option interface 'L3'
        option sources '192.168.103.0/24'
        option tcp_no_redir_ports 'disable'
        option udp_no_redir_ports 'disable'
        option use_global_config '0'
        option tcp_node 'AI7uCLje'
        option udp_node 'tcp'
        option tcp_proxy_drop_ports 'disable'
        option udp_proxy_drop_ports 'disable'
        option tcp_redir_ports '1:65535'
        option udp_redir_ports '1:65535'
        option use_direct_list '0'
        option use_proxy_list '0'
        option use_block_list '0'
        option use_gfw_list '0'
        option chn_list '0'
        option tcp_proxy_mode 'proxy'
        option udp_proxy_mode 'proxy'
        option dns_shunt 'dnsmasq'
        option dns_mode 'tcp'
        option dnsmasq_dns_redirect '0'
        option remote_dns '127.0.0.1:5137'

2： MosDNS 开3个实例, 每个实例监听不同端口 A: 5135 B: 5136 C: 5137

A 实例配置（监听端口 5135，SOCKS5 代理 127.0.0.1:1083）

文件名示例：config_A.yaml

log:
  level: info
  file: "/tmp/mosdns_a.log"

plugins:
  - tag: forward_remote
    type: forward
    args:
      concurrent: 1 
      upstreams:
        - tag: google_doh
          addr: "https://dns.google/dns-query"
          dial_addr: "8.8.8.8"
          bootstrap: "8.8.8.8"
          idle_timeout: 30
          socks5: "127.0.0.1:1083"         
        - addr: "tcp://8.8.8.8"         
          idle_timeout: 30
          socks5: "127.0.0.1:1083"  
          enable_pipeline: true

  - tag: main_sequence
    type: sequence
    args:
      - exec: $forward_remote

  - tag: udp_server
    type: udp_server
    args:
      entry: main_sequence
      listen: ":5135"

  - tag: tcp_server
    type: tcp_server
    args:
      entry: main_sequence
      listen: ":5135"
      
      

B 实例配置（监听端口 5136，SOCKS5 代理 127.0.0.1:1084）

文件名示例：config_B.yaml

log:
  level: info
  file: "/tmp/mosdns_b.log"

plugins:
  - tag: forward_remote
    type: forward
    args:
      concurrent: 1 
      upstreams:
        - tag: google_doh
          addr: "https://dns.google/dns-query"
          dial_addr: "8.8.8.8"
          bootstrap: "8.8.8.8"
          idle_timeout: 30
          socks5: "127.0.0.1:1084"         
        - addr: "tcp://8.8.8.8"         
          idle_timeout: 30
          socks5: "127.0.0.1:1084"  
          enable_pipeline: true

  - tag: main_sequence
    type: sequence
    args:
      - exec: $forward_remote

  - tag: udp_server
    type: udp_server
    args:
      entry: main_sequence
      listen: ":5136"

  - tag: tcp_server
    type: tcp_server
    args:
      entry: main_sequence
      listen: ":5136"
      
      

C 实例配置（监听端口 5137，SOCKS5 代理 127.0.0.1:1085）

文件名示例：config_C.yaml

log:
  level: info
  file: "/tmp/mosdns_c.log"

plugins:
  - tag: forward_remote
    type: forward
    args:
      concurrent: 1 
      upstreams:
        - tag: google_doh
          addr: "https://dns.google/dns-query"
          dial_addr: "8.8.8.8"
          bootstrap: "8.8.8.8"
          idle_timeout: 30
          socks5: "127.0.0.1:1085"         
        - addr: "tcp://8.8.8.8"         
          idle_timeout: 30
          socks5: "127.0.0.1:1085"  
          enable_pipeline: true

  - tag: main_sequence
    type: sequence
    args:
      - exec: $forward_remote

  - tag: udp_server
    type: udp_server
    args:
      entry: main_sequence
      listen: ":5137"

  - tag: tcp_server
    type: tcp_server
    args:
      entry: main_sequence
      listen: ":5137"
      
      

MosDNS 三实例 init 脚本合集，适用于 OpenWRT，分别控制 A/B/C 实例。

1. /etc/init.d/mosdns_a

#!/bin/sh /etc/rc.common
#
# Copyright (C) 2020-2022, IrineSistiana
#
# This file is part of mosdns.
#
# mosdns is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# mosdns is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

START=99
USE_PROCD=1

#####  ONLY CHANGE THIS BLOCK  ######
PROG=/usr/bin/mosdns # where is mosdns
RES_DIR=/etc/mosdns/ # resource dir / working dir / the dir where you store ip/domain lists
CONF=./config_A.yaml   # where is the config file, it can be a relative path to $RES_DIR
#####  ONLY CHANGE THIS BLOCK  ######

start_service() {
  procd_open_instance
  procd_set_param command $PROG start -d $RES_DIR -c $CONF

  procd_set_param user root
  procd_set_param stdout 1
  procd_set_param stderr 1
  procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
  procd_close_instance
  echo "mosdns is started!"
}

reload_service() {
  stop
  sleep 2s
  echo "mosdns is restarted!"
  start
}

2. /etc/init.d/mosdns_b

#!/bin/sh /etc/rc.common
#
# Copyright (C) 2020-2022, IrineSistiana
#
# This file is part of mosdns.
#
# mosdns is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# mosdns is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

START=99
USE_PROCD=1

#####  ONLY CHANGE THIS BLOCK  ######
PROG=/usr/bin/mosdns # where is mosdns
RES_DIR=/etc/mosdns/ # resource dir / working dir / the dir where you store ip/domain lists
CONF=./config_B.yaml   # where is the config file, it can be a relative path to $RES_DIR
#####  ONLY CHANGE THIS BLOCK  ######

start_service() {
  procd_open_instance
  procd_set_param command $PROG start -d $RES_DIR -c $CONF

  procd_set_param user root
  procd_set_param stdout 1
  procd_set_param stderr 1
  procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
  procd_close_instance
  echo "mosdns is started!"
}

reload_service() {
  stop
  sleep 2s
  echo "mosdns is restarted!"
  start
}

3. /etc/init.d/mosdns_c

#!/bin/sh /etc/rc.common
#
# Copyright (C) 2020-2022, IrineSistiana
#
# This file is part of mosdns.
#
# mosdns is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# mosdns is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

START=99
USE_PROCD=1

#####  ONLY CHANGE THIS BLOCK  ######
PROG=/usr/bin/mosdns # where is mosdns
RES_DIR=/etc/mosdns/ # resource dir / working dir / the dir where you store ip/domain lists
CONF=./config_C.yaml   # where is the config file, it can be a relative path to $RES_DIR
#####  ONLY CHANGE THIS BLOCK  ######

start_service() {
  procd_open_instance
  procd_set_param command $PROG start -d $RES_DIR -c $CONF

  procd_set_param user root
  procd_set_param stdout 1
  procd_set_param stderr 1
  procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
  procd_close_instance
  echo "mosdns is started!"
}

reload_service() {
  stop
  sleep 2s
  echo "mosdns is restarted!"
  start
}

统一控制脚本 /etc/init.d/mosdns_all，可以用来同时启动、停止、重启 MosDNS 的 A、B、C 三个实例。

/etc/init.d/mosdns_all

#!/bin/sh /etc/rc.common
# Unified control for MosDNS A, B, C instances

START=96
STOP=9

start() {
    echo "Starting all MosDNS instances..."
    /etc/init.d/mosdns_a start
    /etc/init.d/mosdns_b start
    /etc/init.d/mosdns_c start
}

stop() {
    echo "Stopping all MosDNS instances..."
    /etc/init.d/mosdns_a stop
    /etc/init.d/mosdns_b stop
    /etc/init.d/mosdns_c stop
}

restart() {
    echo "Restarting all MosDNS instances..."
    /etc/init.d/mosdns_a restart
    /etc/init.d/mosdns_b restart
    /etc/init.d/mosdns_c restart
}

使用方式：

chmod +x /etc/init.d/mosdns_all
/etc/init.d/mosdns_all enable
/etc/init.d/mosdns_all start    # 启动全部
/etc/init.d/mosdns_all stop     # 停止全部
/etc/init.d/mosdns_all restart  # 重启全部