树莓派2在U8300W平台上用pppd拨号时出现“pppd: The remote system is required to authenticate itself”

利用pppd拨号，首先需要调试好驱动

1）安装ppp

sudo apt-get install -y ppp

sudo apt-get install -y ppp-dev

sudo apt-get install -y pptpd

2)配置文件

将TIMEOUT 5 '' AT OK ATE0V1 OK AT OK ATS0=0 OK AT OK ATE0V1 OK AT OK ATDT*99*# CONNECT  '' /*注意：是两个英文状态下的逗号，前面也是*/，写入配置文件chatscrript，然后执行sudo pppd /dev/ttyUSB1 persist connect "chat -v -f /tmp/chatscrript"即可完成拨号

3）拨号成功，可用ifconfig查看，有ppp0，已经分配了ip地址

注意：在这个过程中可能出现错误“

pppd: The remote system is required to authenticate itself

pppd: but I couldn’t find any suitable secret (password) for it to use to do so.

”

解决方法：在配置文件/etc/ppp/options末尾添加上noauth即可。