firewall

  1. No speech on calls between customer sites

    Hi all, I have a customer with a slightly unusual setup. They have a 3CX hosted PBX (hosted by 3CX). They have a main office location and that is where their main phone is located, set up to act as an SBC/router phone (I will call this location A). They then have several remote offices (I will...
  2. fabiomcaldeira

    Bridges NOT Working after locking down Geo locations

    Reaching out to the community in case anyone has had a similar experience. We self host our 3CX systems in our data centre. Previously we have had our firewall rules and access to our 3CX systems open to anywhere in the world After recent attempts I have locked down geo locations for each PBX...

  3. Sophos Firewall, AT&T On-prem SIP, and 3CX VM

    Good afternoon everyone! Does anyone have any good tips or pointers using a Sophos firewall and setting up 3CX as a VM? We have AT&T on-prem SIP for voice services. The thought is to set a port on the firewall to the AT&T SIP static and then set up a DNAT to point that traffic to the 3CX VM host...

  4. 3CX RTP Firewall 'Other' Ports

    Afternoon All, I have a 3CX (V20) install on a different subnet (10.251.11.2) to the IP phones (10.241.11.0/24). I have opened ports 9000-10999 and 5060-5063 between the IP Phones and the PBX and two way audio is working fine. When I attempt to use the *777 echo test, I have noticed that the...

  5. Setup more than 2 3CX installation in a Single Firewall with one public IP Address

    Good morning Team, I have one Fortinet firewall with one public IP. I ave one 3CX installed with all 3CX Policies created on firewall. I need to install two more new 3CX installations and need and firewall policies (https://www.3cx.com/docs/fortigate-firewall-configuration/). I KNow 3CX...

  6. Solved Another firewall question, but not as you think.

    I've been running v18 for a little while now and everything is going with it a hitch. My installation is a little unique as I chose to link remote offices via VPN and use 3cx over the VPN connection for all phone activity. Standard installation is to use 3cx softphone with an attached...
  7. jimbo59

    Solved Changing IPs

    I had to change a block of IP addresses and it should have gone smoothly but I ran into the strangest problem. I switched the addresses from Comcast, modified the router/firewall, and told Flowroute where to trust me. Picked up the phone and was able to call myself Friday night. Monday morning...
    • jimbo59
    • Thread
    • changed ip address firewall flowroute sip trunks
    • Replies: 3
    • Forum: Other
  8. KMorley

    3CX Hosted with SBC on a high-security, heavily firewalled network?

    I have an opportunity to install a 3CX V20 hosted system to support 12 branch offices. The networks in these sites are not interconnected. Each connects to a central data center, but there is no connectivity between the sites. Additionally, the sites can optionally have Internet access for...

  9. Webclient lädt Dashboard nicht

    Guten Morgen, Eines unserer Kunden verwendet den 3CX WebClient in einer Terminalumgebung welche von einem dritten Dienstleister im Rechenzentrum gehostet wird. Die 3CX Telefonanlage auf die sie zugreifen ist eine selfhosted Anlage in der Cloud. Noch wird V18 verwendet. Der Betreiber der...
  10. ronenba

    Cisco Meraki with hosted 3CX provisioning doesn't work properly

    we have hosted 3CX PBX, we are having an issue provisioning Are there any settings that need to be addressed on the Meraki firewall (the PBX hosted by 3CX) For another system we have behind Fortinet we needed to disable ALG and it is working, again the PBX hosted on 3CX servers Do any...

  11. Anyone who have tried to get 3cx to work through NSX firewall in VMWare on AWS?

    It looks like I'm the first one who encountered this setup. Anyone who can give some hints? https://aws.amazon.com/vmware/ BR Per

  12. Problem with multiple public IP - Firewall

    Hello, I've tried to install 2 3CX self hosted on my virtualization. I have 7 public IP's, the "main" IP is 19x.xx.34.xxx the other 6 IP "attached" to it is 19x xx.60.xxx So, in the Network setting of the two 3CX I have set up on one 3CX 19x.xx.60.xx1 (example) and on the other 19x.xx.60.xx2...

  13. Syslog or View Blacklist Logs

    A few of our customers are getting excessive blacklisted IPs due to failed authentications. I would would like to implement an automated method of permanently blocking those IPs. The best way to do this I believe would be to use syslog to send the logs elsewhere on the network and then do the...

  14. Firewall test fail

    Hi, Even if we have opened all the door like's 3cx request, the test always fail I attach 2 screenshot. I've tryied to do a call and there isn't problem, voice quality is good. Also making a conference...but firewall check is always red! Where's the problem?

  15. Intermittent Outbound Calls Get Setup, Most Do Not

    Hello, We have been up and running in our environment with no issues when placing outbound calls for about three weeks. Today we've been experiencing a situation where when an outbound (to SIP trunk) call is placed and fails most of time, but completes sometimes. There is no pattern, sometimes...

  16. Firewall 3CX PhoneSystem Media Server failed

    Hi everyone, i recently changed my 3cx server machine and restored 3cx from backup. No changes made to network infrastructure. Router: FritzBox 7590 with server ip exposed host enabled Firewall: Windows Firewall with all inbound roules for 3cx setted. I have one way audio on outbound and...

  17. Allowing PBX to Connect to the MCU via Firewall Whitelist

    On the firewall for the PBX we are whitelisting what destinations are accessible, and I'm having a difficult time with the MCU functionality. I found this post https://www.3cx.com/community/threads/ports-required-to-connect-mcu-webmeeting.73303/ and have whitelisted the domains that it...

  18. DigitalOcean 3cx app - how to enable SSH port 22

    The description says: "For security purposes, Port 22 (SSH) is not enabled in the default firewall created by the marketplace deployment. Should you need to access your instance via SSH, make sure you allow access to Port 22 from your IP. *". I tried ufw, iptables and nft, but apparently they...

  19. 3CX Client Requires Direct SIP Ports

    Our 3CX client requires us to manually configure firewall rules to allow direct SIP communication, instead of using the tunnel. Users report no sound during calls, internal or external, unless the SIP ports are open. 3CX claims all that needs to be done is allow the 3CX tunnel, but this is...

  20. We hear callers, but they can't hear us.

    We have a phone system that has been working well but recently we tried to move to a new location and due to ISP it failed. We went back to the on-site system but now when someone calls in we can't hear them but they can hear us. It is only at one of our locations so I'm assuming its a...
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