Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

  • WAF - Static URL Hardening error

    SFOS 19.5MR3 I'm getting multiple WAF-Logentrys with exact same URL (upper-/lowercase) - one request passes correctly the other one fails due to "Static URL Hardening - No Signature found". As it's same exact same URL it's probably not a configuration…
  • docusign TLS decryption error - HTTP parsing error encountered

    Using TLS decryption and vendor Docusign suddenly causes issues with our XG firewall on 19.5.3. Happens also on other browsers and OS. Here Safari in MacOS. it works using classic proxy as described here: https://support.sophos.com/support…
  • Video conferencing in web browser

    Hello everyone, we have been having problems with video conferencing via browser for some time now. We are using a XG 230 in webproxy mode with HTTPS decryption, IPS and ATP activated. The clients are configured with a standard / manual proxy. Everything…
  • SSL/TLS Decryption rule errors

    Hello everyone, Since v20 I need to disable / enable a SSL/TLS Decryption rule nearly every to every 2 days. It stops processing traffic and on a client device it "feels" like the internet is down. This instantly recovery after disabling / enabling…
  • WAF not working after Upgrade to SFOS 20.0

    We have updated our XGS3300 to SFOS 20.0 a few days ago. Since then our WAF ist not working. AH00526: Syntax error on line 106 of /cfs/waf/reverseproxy.conf: Invalid encrypted key AH00112: Warning: DocumentRoot [/sdisk/waffiles/1cf6480d9dcdd33a4319301e0d8ef22b…
  • HTTPS decrypt and scan - not identifying embedded URLs

    Hi folks, a question about decrypt and scan that has me puzzled for sometime. The users have the XG certificate installed and functioning correctly except for Apple sites. I have web policies blocking advertisements and use the XG proxy, this functions…
  • SMTP DoS settings (methodology)

    Have already been referred here: https://doc.sophos.com/nsg/sophos-firewall/19.5/help/en-us/webhelp/onlinehelp/AdministratorHelp/Email/GeneralSettings/index.html#smtp-settings I wonder if any of you guys can share with me what and why your settings…
  • Sophos SFOS WAF Rules limit

    Hello, We use the Web Server Protection of Sophos XG Firewall and have now reached almost 60 WAF rules. This is also the maximum number of WAF rules. Is it possible to combine several URLs in one WAF rule and route them to different servers? WAF rule…
  • XG Web policy numbering?

    Hi folks, I am trying to identify which web policy is identified on the logviewer reports causing traffic to be blocked. So far the reports have shown policies numbered 1, 2 and 13. The issue being I don't have 13 web policies and policies 1 and 2…
  • Check weblinks in e-mails

    Hello everyone, I have the following question. We have a customer with an XGS 3100 with version 19.5.3. The Sophos serves as a mail gateway/relay and is connected to Sandstorm. Now the question was whether Sophos can also check web links within incoming…
  • Incoming messages are sent to quarantine even though quarantine is deactivated

    Hello, as the shared mailboxes that we use almost exclusively cannot use the mail quarantine, we have not been using mail quarantine since the switch to SFOS. Recently, however, important messages have been ending up in quarantine again due to an allegedly…
  • Why are SMTP Mail "Reject" events not logged properly?

    I can only see "Reject" events in the GUI when going to Email -> Mail logs. I do not find them anywhere in any of the built-in logs and they are also not sent as audit logs. The other SMTP Anti-spam events "Dropped" and "Delivered" are both logged in…
  • Outgoing SMTP Traffic

    Hello, We use 2 WAN interfaces but want to route the outgoing SMTP traffic via one interface. What would be the best approach here?
  • Do I need to use auto added Firewall rule for SMTP scanning?

    Hi, I am prepairing configuration to use XGS as MTA and I have some questions which I don't find answers to. Current situation: External MX and MAIL-out server are used, Exchange is set up locally. We have /24 public IPs on that site and only…
  • Enable users to integrate external mail server accounts (via IMAP/SMTP) with Sophos XG330 acting as an MTA in our network

    Good day, our Sophos XG330 acts as an MTA in our network. We have an on-premise Exchange server for whose domain we have created an SMTP policy in the Sophos email settings. This is working very well so far. Now we have to enable our users to integrate…
  • Is it possible to offload HTTPS on the Sophos fw and send plain HTTP to the real server ?

    Is it possible to decrypt HTTPs on the firewall and send plain HTTP to the webserver (without encrypting it again)? Thanks!
  • WAF & large files – how do you deal with it?

    Hi all, When AV or other protection features are enabled, we keep running into various problems while uploading large files. Sometimes the disk space (Temp=100%) seems to be the cause, sometimes other internal buffers. We have the requirement to allow…
  • Outlook translator feature blocked

    Hi, Outlook translator feature isn't working; I received this error, as seen in the below photo, and was unable to find out how to allow the traffic for the Outlook translator tool As I add my IP address to any destination + any port. The translation…
  • Stop! This website is blocked

    Hello everyone, Recently i noticed a bunch of tickets regarding the following. i want to go on facebook, but facebook is blocked. instead of the blocked page i get Error code: SEC_ERROR_UNKNOWN_ISSUER(firefox) or NET::ERR_CERT_AUTHORITY_INVALID…
  • Firewall in MTA mode not sending out mails

    Hello, I delete the MTA SMTP default rule, cause it seems to do to much. How is this rule used? How do I get it back? MTA Switch to Legacy and back? Config stays at it is? Thanks Sven
  • SMTL TLS Configuration Setting

    We disabled legacy TLS protocols and some of the legacy vulnerability did get mitigated. But we still have TLS1.1 vulnerabilities as per our vulnerability assessment tool. Is Sophos planning on removing TLS1.1 support from SMTL TLS config setting? what…
  • Annahme von Email an unbekannte Empfänger

    Moin, unsere XGS reicht immer noch Emails an den Exchange durch, für User, die nicht mehr aktiv sind. Beispiel: Wir hatten früher einen User T.Test@ unsereDomaine.de . Diesen User gibt es nicht mehr. Im AD und im Exchange gibt es diesen User und auch…
  • SFOS 19.5.3 MR-3: Web Server Protected, Path-Specific routing - should this config work?

    Hi, I have a WAF rule configured for path-specific routing, however, the routes I am specifying are all to the same target web server, but with different restrictions. e.g. / - restricted to specific IP ranges, target sevrer1 /myapp/ - not restricted…
  • EMAIL DKIM issue QUARANTINE with policy allowed

    We use Sophos Firewall as EMail Protection for incoming Mails. Firmware: SFOS 19.5.3 MR-3-Build652 SMTP deployment mode: Device acts as a Mail Transfer Agent (MTA) DKIM Settings: DKIM is set to accept, some mails will be quarantined by DKIM verification…
  • Sophos XG Firewall allow http download

    I am not sure which settings is causing it, but i have hard time finding anything usefull about it. On my network only https is allowed, now we got arduino boards which sadly downloads over the app their zips(firmware) over http (without the S ..…