DD-WRT（pptp-client）：连接到VPN时自动添加路由和DNS信息？

2 回答

• 2

  当ppp连接启动此脚本时：

  /etc/ppp/ip-up
  

  在您的系统中执行 . 请注意，有一些变量从服务器传递 . 阅读最后的 for 语句，它将启动更多脚本：

  #!/bin/sh
  # This script is run by pppd after the link is established.
  # It executes all the scripts available in /etc/ppp/ip-up.d directory,
  # with the following parameters:
  # $1 = interface name (e.g. ppp0)
  # $2 = tty device
  # $3 = speed
  # $4 = local IP address
  # $5 = remote IP address
  # $6 = ipparam (user specified parameter, see man pppd)
  ifconfig $1 mtu 1280 || true
  
  cd /etc/ppp/ip-up.d || exit
  
  for SCRIPT in *.sh ; do
          . ./"${SCRIPT}" "$@"
  done
  

  在 /etc/ppp/ip-up.d 文件夹中，我有一个名为 40-dns.sh 的文件 . 它看起来像这样，它将使用VPN服务器发送的DNS服务器设置 /etc/resolve.conf

  #!/bin/sh    
  # Handle resolv.conf generation when usepeerdns pppd option is being used.
  # Used parameters and environment variables:
  # $1 - interface name (e.g. ppp0)
  # $USEPEERDNS - set if user specified usepeerdns
  # $DNS1 and $DNS2 - DNS servers reported by peer
  
  if [ "$USEPEERDNS" ]; then
  
          if [ -x /sbin/resolvconf ]; then
                  {
                          echo "# Generated by ppp for $1"
                          [ -n "$DNS1" ] && echo "nameserver $DNS1"
                          [ -n "$DNS2" ] && echo "nameserver $DNS2"
                  } | /sbin/resolvconf -a "$1"
          else
                  # add the server supplied DNS entries to /etc/resolv.conf
                  # (taken from debian's 0000usepeerdns)
  
                  # follow any symlink to find the real file
                  REALRESOLVCONF=$(readlink -f /etc/resolv.conf)
  
                  if [ "$REALRESOLVCONF" != "/etc/ppp/resolv.conf" ]; then
  
                          # merge the new nameservers with the other options from the old configuration
                          {
                                  grep --invert-match '^nameserver[[:space:]]' $REALRESOLVCONF
                                  cat /etc/ppp/resolv.conf
                          } > $REALRESOLVCONF.tmp
  
                          # backup the old configuration and install the new one
                          cp -dpP $REALRESOLVCONF $REALRESOLVCONF.pppd-backup
                          mv $REALRESOLVCONF.tmp $REALRESOLVCONF
  
                          # correct permissions
                          chmod 0644 /etc/resolv.conf
                          chown root:root /etc/resolv.conf
                  fi
          fi
  
  fi
  

  对于要在连接 Build 的路由表中推送的路由，您应该能够执行类似的操作 . 转到pppd手册页以查看您需要使用的变量名称 .

  这些代码示例来自我的Gentoo Linux PC，但这些东西是Linux通用的，所以它也适用于DD-WRT .

  回复于 2024-04-29T10:47:54+08:00
• 1

  虽然以前的答案对于Linux来说是正确的，但您无法在某些ddwrt路由器上轻松编辑或添加文件 .

  我使用的所有4个ddwrt路由器在运行pptp客户端时生成这些文件，因此无法仅更改或添加文件 .

  这是一个似乎适用于大多数路由器的解决方法http://stadar.org/content/ddwrt-pptp-client-add-routes-after-connection

  回复于 2024-04-29T10:47:54+08:00