若遺忘了當初申裝電信業者數據機的小卡片(記錄著PPPoE帳號密碼)，這篇文章或許是你的救星，但僅限於合法用途。不廢話了直接開始吧...
1.
電腦以有線或無線的方式連接數據機，你可以用ipconfig看到自己的IP，因為我的網路卡較多因此列出指定網卡的ip，指令netsh interface ip show address [網卡名稱]
然後ARP表可能紀錄非常多的對應條目，請尋找數據機的MAC地址。
Zyxel數據機的系統，簡易模式帳密為user / user，此模式能做的設定功能非常有限；
專家模式帳密，可能需要交叉組合網路上所流傳的...北中南區域預設帳號，或是型號+MAC末4碼，以我為例就是cht / p880e2a4
2.
備份數據機設定檔，Management>BACKUP>Backup Settings
以記事本打開它，並尋找關鍵字hinet.net，密碼會以Base64格式儲存在這裡，以我為例，末幾碼為NzMA
3.
Base64轉十進制的平台非常多、或者問神(ChatGPT)、當然靠自己計算也可以，然後輕鬆得到轉換後的數據機密碼。
If you forgot PPPoE password for install ISP modem, this blog is your good support. But with LEGALITY ONLY. Let's go!
1.
Computer connected modem by wired or Wi-Fi, you can get the IP address by ipconfig.
Because I have so much interfaces at 1 computer, I need specified 1 interface, command 「netsh interface ip show address [interface name]」.
Maybe ARP table has so much L3 / L2 entries record. please to find MAC address of modem.
Zyxel modem system, simple mode account is user / user, the mode's feature is very less.
Expert mode, maybe password is model + MAC end-4 code. In my example, it is cht / p880e2a4
[screenshot]
2.
And then, backup config for modem, Management>BACKUP>Backup Settings
Open it by notepad.exe, and search keyword 「hinet.net」, the password has stored here by Base64. In my example, end-code is NzMA
[screenshot]
3.
The platforms are so much with Base64 transform to decimal. or you can ask ChatGPT, or calculate self.
Last, you can get the modem password with decimal easily.
[screenshot]
