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enkhnasan
Explorer

sip alg Disable 1800 series

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We used 3CX Phone System 

How to Disable SIP ALG on  CP-1800 series???

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1 Solution

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G_W_Albrecht
Legend
Legend
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12 Replies
_Val_
Admin
Admin

Local on central management? SW version?

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G_W_Albrecht
Legend
Legend
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enkhnasan
Explorer

thank you reply it 

we have used 3CX Phone system 

but when I make a call, I can't hear the persons voice 

This is done according to the instructions, but the sound is not transmitted at all

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enkhnasan
Explorer

 

Screenshot 2021-06-09 192921.png

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G_W_Albrecht
Legend
Legend

Look into the logs - do you see drops ? And do you have defined the rule(s) for your kind of deployment according to sk113573 ? Key is to keep inspection for these services enabled.

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enkhnasan
Explorer

 

111.png

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enkhnasan
Explorer

i dont see drops 

only sound is not transmitted at all

 

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enkhnasan
Explorer

2222.png

Do I need to enable these two settings

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G_W_Albrecht
Legend
Legend

The sencond one could be worth trying - but primarily, sk113573 is important for configuration.

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WiVM
Explorer

Hi,

I don't want to hijack the post, but I seem to have the same issue with 3CX as the original poster:

The 3CX firewall test reports:
detecting SIP ALG... detected (received 652ddfc6 ≠ 56d26e13) (How to resolve?)

I am using a local Check Point 730 Appliance - Version: R77.20.75 (990172286)

Went through the suggested posts already. Problem remains. The rest of the 3CX traffic is working fine.

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G_W_Albrecht
Legend
Legend

Please update to a current firmware first, i suggest R77.20.87 Build 990173083 for 700/900/1400

Then contact TAC to get the issue resolved, use chat for a quick solution !

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WiVM
Explorer

@G_W_Albrecht wrote:

The sencond one could be worth trying - but primarily, sk113573 is important for configuration.


Tried both, none worked.

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