Port number is IP address causing 400 error in s-GTM

Facebook Conversion API
1

Hi

Sorry if this should have gone in the GTM category, this is a FB CAPI issue in s-GTM.

The Stape serverr tag fire but the tag fails because of this issue:

{“error”:{“message”:“Invalid parameter”,“type”:“OAuthException”,“code”:100,“error_subcode”:2804007,“is_transient”:false,“error_user_title”:“Invalid IP address”,“error_user_msg”:“The IP address you’ve entered is invalid. Enter a valid IP address.”,“fbtrace_id”:“A9vqn8LT2oj0di7dGIG5VLw”}}

When investigating the response body, I can see the port number in the IP address:
{“data”:[{“event_name”:“PageView”,“action_source”:“website”,“event_source_url”:“https://www.[domain]/?gtm_debug=[ID number]”,“event_time”:1687169125,“custom_data”:{},“user_data”:{“client_user_agent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36”,“client_ip_address”:“[my IP]:51185”,“fbp”:“fb.1.1687169124595.1743161412”},“event_id”:“1687169125483.413950.405”}],“partner_agent”:“stape-gtmss-2.0.0”,“test_event_code”:“TEST7744”}

How can I resolve this issue?

2

Hi, are you overwriting the ip aders parameter in the server Facebook tag?
Also, are you transferring data from the web to the server via GA4 tag / Data tag or something else?
What data do you see in the ip_override parameter in the event data in preview mode of the server container?

3

Hi Alex

Here’s a screen shot of the FB server tag, you can see nothing about the IP address is being manipulated

FB s-tag
FB s-tag1903×929 87.5 KB

Yes, data is being trasferred from web to server via GA4 client tag

The ip_override parameter value in event data shows my IP and the port number

4

Seems strange, haven’t seen this before, are you using the localhost version of the site?

5

I’m not sure what you mean, and you referring to the server container URL?

6

Your problem is not in the Facebook tag, because the tag uses the ip_override parameter in which you are using an incorrect value. I assume you use your own hosting for sGTM? If so, most likely the problem could be in your reverse proxy settings.
I think the easiest way is to create a separate variable that will take the port out of your ip_override, for example with .split()

7

Thanks Alex, I’ll speak to my developer and report back

8

Hi @Alex & @adnams,

Can you guys give more information on how to resolve this reverse proxy settings issue?