Captive portal fails randomly

[Alejandro_Ferna]

Hi, we are having some issues in captive portal authentication.

Users get this message randomly (with the correct password):

Once this message appears, it's impossible to log in. The user has to close the navigator's tag and try again until it works.

These are the related pdpd.elg log entries:

[16716 4105733904]@hades1[29 Oct 16:00:00] [TRACKER]: #405402 -> INCOMING -> PORTAL_REQUEST -> Portal Hello from ip: 10.10.4.22
[16716 4105733904]@hades1[29 Oct 16:00:00] [TRACKER]: #405403 -> OUTGOING -> PORTAL_RESPONSE -> hello ok...ip: 10.10.4.22 ,session: f9a1fbc6
[16716 4105733904]@hades1[29 Oct 16:00:09] [TRACKER]: #405438 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: f9a1fbc6, user: a.fernandez

(The user gets here the "login failed" message)

[16716 4105733904]@hades1[29 Oct 16:01:42] [TRACKER]: #405805 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: f9a1fbc6, user: a.fernandez
[16716 4105733904]@hades1[29 Oct 16:01:48] [TRACKER]: #405855 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: f9a1fbc6, user: a.fernandez
[16716 4105733904]@hades1[29 Oct 16:02:12] [TRACKER]: #405957 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: f9a1fbc6, user: a.fernandez
[16716 4105733904]@hades1[29 Oct 16:02:13] [TRACKER]: #405963 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: f9a1fbc6, user: a.fernandez
[16716 4105733904]@hades1[29 Oct 16:02:31] [TRACKER]: #406040 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: f9a1fbc6, user: a.fernandez

(After a few clicks in the "log In" button, the user close the tag and reopen it)
[16716 4105733904]@hades1[29 Oct 16:02:53] [TRACKER]: #406179 -> INCOMING -> PORTAL_REQUEST -> Portal Hello from ip: 10.10.4.22
[16716 4105733904]@hades1[29 Oct 16:02:53] [TRACKER]: #406181 -> OUTGOING -> PORTAL_RESPONSE -> hello ok...ip: 10.10.4.22 ,session: e12519ba
[16716 4105733904]@hades1[29 Oct 16:03:04] [TRACKER]: #406314 -> INCOMING -> PORTAL_REQUEST -> login_auth for session: e12519ba, user: a.fernandez
[16716 4105733904]@hades1[29 Oct 16:03:04] [TRACKER]: #406315 -> OUTGOING -> PORTAL_RESPONSE -> auth ok!... session: e12519ba
[16716 4105733904]@hades1[29 Oct 16:03:04] [TRACKER]: #406316 -> INCOMING -> PORTAL_REQUEST -> login_seq_done for session: e12519ba
[16716 4105733904]@hades1[29 Oct 16:03:04] [TRACKER]: #406319 -> OUTGOING -> PORTAL_RESPONSE -> login_seq_done ok...session: e12519ba
[16716 4105733904]@hades1[29 Oct 16:03:04] [TRACKER]: #406320 -> INCOMING -> PORTAL_REQUEST -> agent_settings for session: e12519ba
[16716 4105733904]@hades1[29 Oct 16:03:04] [TRACKER]: #406321 -> OUTGOING -> PORTAL_RESPONSE -> agent_settings ok... session: e12519ba

(Log In Success at first attempt)

Any idea or clue about this issue? This is a R80.10 on-premise gateway.

Thank you!

Alex