SSL VPN web mode strange behaviour, 403 - access denied on login screen.

[Lennart]

Hi,

I'm trying to use SSL VPN web mode on a FortiGate 60F running v7.4.8 build2795 (Mature). This has worked before and has stopped working without changing the config. Is anyone else experiencing simular issues?

Thanks

-- Screen when browsing to WebVPN --

First screen after browsing to webvpn

-- Screen after pressing OK --

login screen after pressing 'ok' on first screen

-- Browser network log --browser network log

Fortigate diagnose log:

2025-06-02 11:56:23 [403:root:b]req: /
2025-06-02 11:56:23 [403:root:b]mza: 0x358f360 /rmt_index.html
2025-06-02 11:56:23 [403:root:b]fsv_check_path_passed:997 No access: check path failed /migadmin/rmt_index.html, /data/migadmin,
 /migadmin
2025-06-02 11:56:23 [403:root:b]sslvpn_zip_handler:136 sslvpn check path failed.
2025-06-02 11:56:23 [403:root:b]req: /sslvpn/css/ssl_style.css
2025-06-02 11:56:23 [403:root:b]mza: 0x358f3a8 /sslvpn/css/ssl_style.css
2025-06-02 11:56:23 [403:root:b]fsv_check_path_passed:997 No access: check path failed /migadmin/sslvpn/css/ssl_style.css, /data
/migadmin/sslvpn/css, /migadmin/sslvpn/css
2025-06-02 11:56:23 [403:root:b]sslvpn_zip_handler:136 sslvpn check path failed.

[abarushka]

Hello,

SSL VPN will be replaced with IPsec VPN soon. You may consider to switch to IPsec. Please find the details by following the link below:

https://docs.fortinet.com/document/fortigate/7.6.1/fortios-release-notes/877104/ssl-vpn-removed-from...

https://docs.fortinet.com/document/fortigate/7.6.3/fortios-release-notes/173430/ssl-vpn-tunnel-mode-...

[Lennart]

Hi, Thanks for your reply. I have considered this and decided to keep using SSL VPN. Found no documentation in regards to it not working anymore on 7.4.8 and for now would like to solve this issue without upgrading.

[Rino_B · Accepted solution]

Same issue as: SSL-VPN Web Portal breaks after 7.4.8 update on 2G... - Fortinet Community

[Lennart]

Missed that, sorry. I'll follow the other topic.