求助：L2TP-ipsec-vpn设置不成功

[honhen]

我用L2TP-ipsec-vpn设置VPN，按照网上的教程做到for each in /proc/sys/net/ipv4/conf/*; do echo 0 > $each/accept_redirects; echo 0 > $each/send_redirects; done这一步时，出现了
bash: /proc/sys/net/ipv4/conf/all/accept_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/all/send_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/default/accept_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/default/send_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/eth2/accept_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/eth2/send_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/lo/accept_redirects: 权限不够
bash: /proc/sys/net/ipv4/conf/lo/send_redirects: 权限不够
我尝试用SUDO CHMOD 777更改权限，系统也提示说权限不够。。。
希望成功设置过L2TP上网的朋友指点，谢谢了
已经解决了，
sudo su
然后再for each in /proc/sys/net/ipv4/conf/*; do echo 0 > $each/accept_redirects; echo 0 > $each/send_redirects; done
成功了

[dreamcast_sh]

sudo for each in /proc/sys/net/ipv4/conf/*; do echo 0 > $each/accept_redirects; echo 0 > $each/send_redirects; done

试试呢

[honhen]

sudo for each in /proc/sys/net/ipv4/conf/*; do echo 0 > $each/accept_redirects; echo 0 > $each/send_redirects; done

试试呢

也试过了，sudo: for: command not found