# No communication between ACS and CPE **URL:** \ **Category:** Uncategorized\ **Created:** [March 24, 2022, 9:02am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506 "2022-03-24T09:02:38Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![soban](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@soban](https://forum.genieacs.com/u/soban)\ **Post date:** [March 24, 2022, 9:02am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/1 "2022-03-24T09:02:38Z")
My genie working from CPE to ACS. But it showing ACS to CPE no ping can any one guide me ---
**Author:** ![jekyll](https://avatars.discourse-cdn.com/v4/letter/j/f14d63/32.png) [@jekyll](https://forum.genieacs.com/u/jekyll)\ **Post date:** [March 25, 2022, 7:24am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/2 "2022-03-25T07:24:49Z")
What is your setting in ACS and CPE side? ---
**Author:** ![mstrolo](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/mstrolo/32/941_2.png) [@mstrolo](https://forum.genieacs.com/u/mstrolo)\ **Post date:** [August 9, 2022, 9:08am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/3 "2022-08-09T09:08:50Z")
did you manage to fix it? ---
**Author:** ![soban](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@soban](https://forum.genieacs.com/u/soban)\ **Post date:** [August 10, 2022, 4:26am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/4 "2022-08-10T04:26:09Z")
for Syrotech ONU it is communicating for Genexis ONU it is not communicating ---
**Author:** ![MYITBRAIN](https://avatars.discourse-cdn.com/v4/letter/m/c67d28/32.png) [@MYITBRAIN](https://forum.genieacs.com/u/MYITBRAIN)\ **Post date:** [October 21, 2022, 6:19am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/5 "2022-10-21T06:19:20Z")
This is happening to us as well with a Yealink T46S and a Cisco 232D. Any idea? ---
**Author:** ![soban](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@soban](https://forum.genieacs.com/u/soban)\ **Post date:** [October 21, 2022, 7:00am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/6 "2022-10-21T07:00:59Z")
no, we are using GX and Syrotech, some times it working and some times its not working ---
**Author:** ![Daniello](https://avatars.discourse-cdn.com/v4/letter/d/22d042/32.png) [@Daniello](https://forum.genieacs.com/u/Daniello)\ **Post date:** [October 21, 2022, 6:08pm UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/7 "2022-10-21T18:08:31Z")
I was having a lot of trouble with acs-\>cpe too until i opened port 7547 IN on the CPE and limited it to src ACS-IP ---
**Author:** ![akcoder](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/akcoder/32/11_2.png) [@akcoder](https://forum.genieacs.com/u/akcoder)\ **Post date:** [October 21, 2022, 7:15pm UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/8 "2022-10-21T19:15:11Z")
> [@Daniello](#): > > opened port 7547 The port on the CPEs you want to allow is the port specified in the ConnectionRequestURL parameter. For SmartRG and Adtran devices, the port is 30005, Zyxel and others its 7547. The CPEs I’ve used automatically open the connection request port on the CPE. So unless there is some upstream filtering going on, there should be no need to explicitly open firewall ports for ACS → CPE authentication. ---
**Author:** ![pankaj231](https://avatars.discourse-cdn.com/v4/letter/p/9f8e36/32.png) [@pankaj231](https://forum.genieacs.com/u/pankaj231)\ **Post date:** [January 15, 2023, 5:22pm UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/9 "2023-01-15T17:22:06Z")
Can You Share your syrotech script for communicating with cpe to acs and acs to cpe. I am not able to configure. ---
**Author:** ![git-neo-si](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/git-neo-si/32/607_2.png) [@git-neo-si](https://forum.genieacs.com/u/git-neo-si)\ **Post date:** [January 15, 2023, 8:22pm UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/10 "2023-01-15T20:22:57Z")
If still not solved, it is probably firewall issue on mgmt vlan of Genexis ONU. Especially, if you are “switching” to a tagged VLAN via DHCP options you send to ONT. There is a bug in “initial config” on FiberTwist ONTs where CWMP port is not open on CPE side. So probably, the same issue. IMHO. Consult provisioning docs how to push “operator config” to ONT to open up firewall for CWMP service on the CPE side. Regards, Robert. ---
**Author:** ![akcoder](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/akcoder/32/11_2.png) [@akcoder](https://forum.genieacs.com/u/akcoder)\ **Post date:** [January 17, 2023, 6:42pm UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/11 "2023-01-17T18:42:24Z")
Necromancy is frowned up. Please create your own post. ---
**Author:** ![soban](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@soban](https://forum.genieacs.com/u/soban)\ **Post date:** [March 25, 2023, 7:20am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/12 "2023-03-25T07:20:07Z")
Hi, Thanks for reply. What is IMHO ---
**Author:** ![mkverma](https://avatars.discourse-cdn.com/v4/letter/m/8e7dd6/32.png) [@mkverma](https://forum.genieacs.com/u/mkverma)\ **Post date:** [March 28, 2023, 11:29am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/13 "2023-03-28T11:29:22Z")
Hey @soban, Is your ACS CPE connection OK now on the ONUs you mentioned ? You can try this: In Admin config section make sure you added cwmp.udpConnectionRequestPort = 3478 (default) or 8547 as described above. I use Coturn as it allows two processes to access the same UDP Port. in the /opt/genieacs.env UDP\_CONNECTION\_REQUEST\_PORT=3478 GENIEACS\_UDP\_CONNECTION\_REQUEST\_PORT=3478 set the port accourdingly as well. ---
**Author:** ![soban](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@soban](https://forum.genieacs.com/u/soban)\ **Post date:** [March 29, 2023, 5:35am UTC](https://forum.genieacs.com/t/no-communication-between-acs-and-cpe/2506/14 "2023-03-29T05:35:30Z")
Thank you, I will try that and i will give you info