最近Fortigate 升級firmware後，某些win7在使用sslvpn連線都會出現 mismatch in the TLS version的錯誤。
有到網際網路選項裡，確確TLS裡面的選項 都有打勾了，還是連不到。
後來才發現是win7的有一些windows update沒安裝造成的。但不確定是哪一支更新，因為沒有一支一支測試，就是全部都裝上，就沒問題了。
After upgrading the Fortigate firmware, we observed that some Windows 7 systems encountered a "mismatch in the TLS version" error when attempting to connect via SSL VPN.
We verified that all TLS-related options were enabled under Internet Options, but the issue persisted.
Upon further investigation, we discovered that the problem was caused by missing Windows Updates on the affected Windows 7 machines.
However, we were unable to determine exactly which specific update resolved the issue, as we did not test each update individually. Instead, after applying all pending Windows Updates, the SSL VPN connection was successfully established.
