LINUX VPN 設定
紅字的部分是須根據個人的帳號與密碼設定， 如test 帳號， 密碼:123456
Linux VPN Client 建置
一.參考網址 https://zh.codepre.com/how-to-6731.html 及 https://kifarunix.com/configure-strongswan-vpn-client-on-ubuntu-18-04-centos-8/
二.對CentOS 8 環境失敗
三.使用Ubuntu Live Server 18.04.5 環境測試OK
四. 設定方式如下
1. Install strongSwan
apt update
apt install strongswan libcharon-extra-plugins
2. Install strongSwan VPN Server CA certificate on the Client 將vpn1.ncu.edu.tw 的chainXX.pem(/etc/letsencrypt/archive/vpn1.ncu.edu.tw 目錄下) ， 更名成chain.pem ， 放置到/etc/ipsec.d/cacerts/ 目錄下
3. Configure strongSwan VPN client (1) vi /etc/ipsec.conf
conn ipsec-ikev2-vpn-client
auto=start
right=vpn1.ncu.edu.tw
rightid=vpn1.ncu.edu.tw
rightsubnet=0.0.0.0/0
rightauth=pubkey
leftsourceip=%config
leftid=test
leftauth=eap-mschapv2
eap_identity=%identity
(2)vi /etc/ipsec.secrets
# This file holds shared secrets or RSA private keys for authentication.
- RSA private key for this host, authenticating it to any other host
- which knows the public part.
- user id : EAP secret
test : EAP "123456"
- this file is managed with debconf and will contain the automatically created private key
- include /var/lib/strongswan/ipsec.secrets.inc
4. 解決no issuer certificate found 'C=US , O="Let's Encrypt, CN=R3"憑證問題
cp /etc/ssl/certs/DST_ROOT_X3.pem /etc/ipsec.d/cacerts/
cp /etc/ssl/certs/ISRG_Root_X1.pem etc/ipsec.d/cacerts/
5.啟動 strongswan
systemctl start strongswan
ps:避免strongswan 在系統啟動時運行systemctl disable strongswan
6.查看狀況
systemctl status strongswan
