修复 Mac 连上 Bras 之后不能访问外网和校内网的问题

add-seu-route.sh

#!/usr/bin/env bash
# Program: 添加东南大学路由表 | http://git.io/AOIiRg
# Note: 使用前需要修改 GATEWAY
# Usage: 添加路由表: sudo add-seu-route.sh
#        删除路由表: sudo add-seu-route.sh del

GATEWAY=192.168.7.1 # 修改成你的连接 bras 前的默认网关

#---------------------------------------------------------------
SEU_NETWORKS=(
    58.192.96.0/19   \
    121.229.0.0/16   \
    121.248.48.0/20  \
    211.65.32.0/19   \
    211.65.232.0/22  \
    172.16.0.0/12    \
    202.119.0.0/19   \
    202.119.144.0/20 \
    )

add_route ()
{
    # Make sure connection to gateway is alive
    if ! /sbin/ping -W 5 -c 1 $GATEWAY > /dev/null; then
        echo "Cannot connect to ${GATEWAY}, check your gateway!"
        exit 1
    else
        # Add SEU route
        for i in ${SEU_NETWORKS[@]}; do
            /sbin/route add $i $GATEWAY
        done
    fi
}

del_route ()
{
    # Recover orginial default gateway after disconnect from bras
    /sbin/route add default $GATEWAY

    # Delete SEU route
    for i in ${SEU_NETWORKS[@]}; do
        /sbin/route delete $i $GATEWAY
    done
}


# Make sure only root can run our script
if [ "$(id -u)" != "0" ]; then
    echo "You need to run $() with sudo or as root"
    exit 1
fi

if [ "$1" == "" ]; then
    add_route
elif [ "$1" == "del" ]; then
    del_route
else
    echo "Usage: [sudo] add-seu-route.sh [del]"
    exit 1
fi

#-------------------------------------------------------------------------------
# add-seu-route.sh - public domain - Chunayng Xu <xuchunyang56@gmail.com> 2014

fix-bras-mac-route.md

Usage

1. 修改配置：

• add-seu-route.sh -- 修改 GATEWAY
• ip-up -- 检查 BRAS_SEU_REMOTE_SERVER 和 ppp0 ，可能需要修改
• ip-down -- 检查 BRAS_SEU_REMOTE_SERVER，可能需要修改

2. 添加可执行权限：

sudo chmod +x add-seu-route.sh ip-up ip-down

3. 移动到相应的目录：

sudo mv ip-up ip-down /etc/ppp
sudo mv add-seu-route.sh /sbin

最终相关配置文件的目录结构：

➜  ~  ls -l /etc/ppp
total 24
-rwxr-xr-x  1 root  wheel  179 Aug  1 13:42 ip-down
-rwxr-xr-x  1 root  wheel  457 Aug  1 13:26 ip-up
-rw-rw-rw-  1 root  wheel   28 Aug  1 12:33 options
➜  ~  ls -l /sbin/add-seu-route.sh
-rwxr-xr-x  1 root  admin  1574 Aug  1 13:42 /sbin/add-seu-route.sh

ip-down

#!/bin/bash

# Check /var/log/ppp.log or just type "grep remote /var/log/ppp.log" from terminal
BRAS_SEU_REMOTE_SERVER="10.254.32.3"

if [ $IPREMOTE = $BRAS_SEU_REMOTE_SERVER ]; then
    # Delete SEU route table
    /sbin/add-seu-route.sh del &> /tmp/ppp.log
fi

ip-up

#!/bin/bash

# Check /var/log/ppp.log or just type "grep remote /var/log/ppp.log" from terminal
BRAS_SEU_REMOTE_SERVER="10.254.32.3"

if [ $IPREMOTE = $BRAS_SEU_REMOTE_SERVER ]; then
    # Replace default route (pppd is supposed to do this for us, but it does not work for now)
    /sbin/route delete default &> /tmp/ppp.log
    /sbin/route add default -interface ppp0 &> /tmp/ppp.log
    # Add SEU route table
    /sbin/add-seu-route.sh &> /tmp/ppp.log
fi

options

plugin L2TP.ppp
l2tpnoipsec

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