Search results for query: security

  1. CopyFail Kernel Vulnerability (CVE-2026-31431)

    Hello, I'm using v20.0 update 8 build 1121. When I check for updates in the GUI, the only available option is "New 20.0 update 9 Alpha". What is the recommended action to keep my system safe? Should I wait for a stable release? Thank you so much

  2. Can't configure IP phones - IP blacklisted

    ...the Yealink T54W tries to provision. I’d probably factory reset the phone first, update it to the recommended firmware, then reprovision it specifically as a router phone again. Sounds more like the PBX security is reacting to failed registration/provision attempts than anything DHCP/IP related.
  3. Kevin Attard Compagno

    Remote Syslog: Enterprise-Grade Security Monitoring for Your 3CX PBX

    Continue reading the Original Blog Post.
  4. bitn2

    Can't configure IP phones - IP blacklisted

    This has absolutely nothing to do with the phone's internal IP address. The phone simply needs to be running the correct firmware and be provisioned as a router phone; then this won't happen. It makes absolutely no difference what internal IP address you have or how often you change it.

  5. Can't configure IP phones - IP blacklisted

    ...the system reacting to your network/IP change. When the Yealink T54W plugs in, it’s probably grabbing a new DHCP address or triggering a security rule, and that’s what’s getting your admin IP blacklisted. That would also explain why you get kicked out of the web console right after. Check the...

  6. CVE-2026-42945 Nginx

    since 16.05.2026: https://lists.debian.org/debian-security-announce/2026/msg00189.html
  7. myitbrainHQ

    3CX FIPS Compliant?

    ...(AES-256, SHA-256+) to align with compliance requirements without needing formal FIPS cert. 3. Windows FIPS policy: Enabling FIPS via Local Security Policy can cause TLS handshake failures depending on how the .NET runtime interacts with the SIP stack. Test in a lab first. For FedRAMP or...
  8. NCIA

    CopyFail Kernel Vulnerability (CVE-2026-31431)

    Can release dates be added to entries on the hotfix changelog? It would also be nice if security hotfix version was visibly exposed somewhere on the Management Console.
  9. Kevin Attard Compagno

    Ai Receptionist - Transfer to External Number out a SIP Trunk?

    Maybe send the call to a "dummy" extension that forwards all its calls outbound? Keep in mind the security implications mentioned by @KyriacosS_3CX ...
  10. TheodorosG_3CX

    CopyFail Kernel Vulnerability (CVE-2026-31431)

    Security updates have been pushed to our repos so you may also confirm: https://www.3cx.com/blog/change-log/pbx-security-updates/
  11. Evolute IT

    Ngnix issues - wont start

    Is there anything else installed on that same machine? Port 80 is not blocked on Windows by default, it should work perfectly fine unless other softwares are installed and are listening on that port (like IIS perhaps.)
  12. Claas Felix Beyersdorf

    Ngnix issues - wont start

    ...listen 8080; the second listen for ipv6 should also Changed. Than you can try to start if this works you can search inside Windows for the security problem. You might also change the 443 lines to higher ports. If the error message changes and indicates something like this. Or you do yourself...
  13. KyriacosS_3CX

    Ringback/progress tone playing once then silence

    ...affects everyone in the office using the PWA, a common network-level interference on the client side is a strong suspect. Firewall/Proxy/Security Software: Corporate firewalls, web proxies, or endpoint security software (antivirus, DLP) can interfere with WebRTC RTP streams. RTP Port...
  14. KyriacosS_3CX

    Ringback/progress tone playing once then silence

    ...Also how the customers end points reach the PBX, and if the trunk provider is a supported one? As you say, something in the network, or some security suite on the computers might be the most likely cause, but a fuller picture is needed. (Hint: using the correct system key in the forum helps :) )
  15. hersham

    Ngnix issues - wont start

    ..."DENY"; add_header X-Content-Type-Options "nosniff"; add_header X-XSS-Protection "0"; add_header Content-Security-Policy "default-src 'self' 'unsafe-inline'; img-src 'self' data:;"; add_header Strict-Transport-Security max-age=31536000...
    • hersham
    • Thread
    • ngnix serv
    • Replies: 4
    • Forum: 4SC
  16. NikosT_3CX

    CopyFail Kernel Vulnerability (CVE-2026-31431)

    @SteveITS we are also aware of this and the same process will be done as previously. When its gonna be ready it will be announced here : https://www.3cx.com/blog/change-log/pbx-security-updates/
  17. SweetAction

    CopyFail Kernel Vulnerability (CVE-2026-31431)

    Awesome!
  18. NikosT_3CX

    CopyFail Kernel Vulnerability (CVE-2026-31431)

    @SweetAction @Benedikt Machens check here, it has been released form our side : https://www.3cx.com/blog/change-log/pbx-security-updates/ 3CX Version 20 SP8, Security Hotfix, Linux Packages, May 2026 all linux-headers-6.1.0-45-common 6.1.170-1
  19. paulodagraca

    Solved Calls to DDI Going to IVR Instead of Direct Extension (3CX)

    Hello @rajveer Great to hear all is good now. Not sure what version 3CX system you have, but please make sure you are on v20 release 8A. There has been some security update on the version 8, so do make sure about this. Paulo
  20. SteveITS

    SMTP Settings not available

    3CX SMTP is not supported in the Free edition per this blog post. That can only help, though u7 is not current stable. That is update 8a including the security fix. (note if you are running Debian you should enable automatic updates, at least from time to time, to install OS security updates too)
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