Wallapop Chat service network port

net-details-Wallapop

I was having the chat messages from the App Wallapop, blocked whenever connected to my local wifi network.
I would disconnect from the wifi and connected to the cell service it would work.
Searching online the Keywords "Wallapop network port chat" gave no useful result.

Searching for App network usage traffic keywords landed me to the following Q/A : 
  https://android.stackexchange.com/questions/203868/how-to-view-network-traffic-requested-by-a-specific-app
 
 This led me to test the following OpenSource App [PCAPdroid - network monitor](https://play.google.com/store/apps/details?id=com.emanuelef.remote_capture), https://github.com/emanuele-f/PCAPdroid
 
 This creates a local VPN and views the App requests.
 I saw that Wallapop requests connections on port 53 443 and 5222
 
 Checking the router I saw that this port is not open on the firewall. 
 It appears as that this is 
Service Name	 Port Number	Description
xmpp-client	      5222	     XMPP Client Connection
xmpp-server	      5269	     XMPP Server Connection
 [more details here](https://www.speedguide.net/port.php?port=5222)

So I went to the firewall settings of my router and opened the port 5222 and the chat now appears to be operating normally

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Local testing from the PC if the port is open was done using the following:

> nmap -p 5222 portquiz.net
Starting Nmap 7.95 ( https://nmap.org ) at 2024-08-07 00:53 Romance Summer Time
Nmap scan report for portquiz.net (35.180.139.74)
Host is up (0.047s latency).
rDNS record for 35.180.139.74: ec2-35-180-139-74.eu-west-3.compute.amazonaws.com

PORT     STATE SERVICE
5222/tcp open  xmpp-client

Nmap done: 1 IP address (1 host up) scanned in 0.85 seconds

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