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Unable to connect to TZ300 management interface

ckeyckey Newbie ✭
in Entry Level Firewalls

I'm trying to login to our TZ300 management interface which has worked fine for years. The last few weeks every time we try to login using a browser it gives an error. The errors vary based on the browser but all seem to be related to SSL. HTTP redirection is on so I can't login without using HTTPS.

I've tried multiple browsers and devices (including non-windows) with the same result.

Firefox: PR_END_OF_FILE_ERROR

Chrome: ERR_CONNECTION_CLOSED (Windows) or ERR_SSL_PROTOCOL_ERROR (iOS)

Edge: ERR_CONNECTION_CLOSED

Any help would be appreciated.

Category: Entry Level Firewalls
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Answers

  • BWCBWC Cybersecurity Overlord ✭✭✭

    @ckey what Firmware you're running? Did you tried accessing the appliance with an older portable version of Firefox? This is what I usually when hitting these kind of errors, especially connecting to older or not updated systems which cause trouble for new more strict browsers.

    --Michael@BWC

  • ckeyckey Newbie ✭

    Thanks Michael. It was on an older firmware version but I updated last night to 6.5.4.13-105n. Since the update everything seems to work.

    I should have mentioned that rebooting the router had previously resolved the issue for a short time before the error would happen again. So while I'm cautiously optimistic that the issue is resolved, I will need to monitor for the next few days to see if it recurs.

    I didn't try an older version of Firefox, but I did try K-Meleon based on a recommendation I saw on a different thread, without success.

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