can anyone help descovering what web adresses an app calls? - Android Q&A, Help & Troubleshooting

I am trying to block a few specific apps from my home network I have the websites blocked but that isnt blocking the apps themselfs, is there any way to view the sights, login servers etc that the apps are calling?
specifically im trying to block dating apps like pof, i have pof.com blocked with pfblockerNG (using pfsense) but that in no way blocks the pof app, as im struggling to see the calls using my router, i was hoping i could do it on the phone level, i have decompiled the app and blocked all the addresses in the xml file, but the app is still working...

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[Q] Why does an app need this permission: ACCESS EMAIL PROVIDER DATA ?

I was looking at this free Kingsoft Office and here is what it lists among its required permissions:
"Access email provider data
Allows this application to access your email database, including received messages, sent messages, usernames and passwords."
It seems highly suspicious to me even without the usernames and passwords part. Can anyone explain? Should I stay away from such apps? Thanks!
The app is in Google Play, I can't give the link because I'm a new user.
OK, so I take it nobody cares why an app downloaded millions of times would ask for these things? To me it seems like a huge risk, so good thing I'm not using it. The developers didn't bother to answer my email either. Great! Check permissions very carefully before you install an app, people!

[Q] Public Wifi Security

I will let you know I am a novice to actually understanding how wifi works, but I was wondering if there was an app that would temporarily shut down incoming/outgoing communications (through wifi only preferably) when I am connect to a public wifi like at school or some cafe? With the exception to allow use of dolphin or any other browser surf the web for less private matters. Why? So apps like facebook, banking, email, ebay's personal information cannot be intercepted by a hacker on the same network.Thanks!
I guess the other answer I am looking for is: Do apps like facebook resend password data on use when you have remained logged in from the last session?
EDIT: I have seen some permissions apps, and settings within my rom. Was wondering if there was something that would block all apps at once like a profile setting.

NoRoot Firewall

Disclaimer: I know nothing on how to configure firewalls except for adding apps to the whitelist/blacklist.
Tried using NRFW and I noticed a few things:
1. I've consumed 12.54GB and 9.77GB was by NRFW. What's happening please.
2. I've tagged some apps that can only connect when I'm on wifi, yet I'm still getting notifications when I'm on mobile data. For example, the Facebook app and some games.
3. How do I determine which IP address should be allowed or blocked? For example, I see IP addresses pointing to Akamai and my ISP.
4. Is it a good idea to turn off background data? I restricted it on mobile data and allowed it when on wifi but some apps would not load properly even when I'm connected to a wifi network.
Thanks in advance! And please excuse me if I posted this in the wrong forum.
EDIT: I'm referring to Grey Shirt's NoRoot Firewall.
I read up a bit and learned that 1e100.net are Google's servers. I understand that these point to ads too. I also noticed my ISP's name shows up under these.
Do I allow these or do I block them?
First of all: sorry for answering so late ;-) ...:
- in my opinion, your traffic from internet is being redirected through this NoRoot Personal Firewall unto your smartphone
- so, the 9.77GB you mentioned were 'routed/directed' through the NRPFW - the rest was not (? - maybe for Android-Updates or anything?)
- as you could most probably see, all of these 9.77GB were allowed to pass through from the internet servers (akamai or google or microsoft or ibm or yahoo or many more..) to your smartphone ('s apps / system apps)
- notifications about your mobile connection(s) MAY simply be wrong (as i found out) - seemingly a bug in the NRPFW-app (?)
- akamai is one of the " intermediate servers" or main server for a couple of websites:
for example, when you open the 'WashingtonPost'-website on your smartphone, (all) contents from their website are upon an akamai-server, because 'WashingtonPost' does not have a server on its own inside their office building maybe big enough to handle all traffic from their website to all readers in the world
- your Internet Service Provider has intermediate servers for (any) web content, too - so, you might want to allow their internet addresses
- furthermore, background data is transferred when you have an email-app and this app (gmail or yahoo-app, e.g.) is transferring data even if you had closed the email-app (so you cannot see it anymore on your launcher) or it's even running in background and checking if there's new mail when auto-started while your smartphone is booting.

Is there a way to block apps from accessing internet in Lollipop?

I did some research on internet and most of the articles related to this topic are either outdated or suggests using some kind of another app.
I want to block internet access to apps I've installed without installing any other app or firewall. I was wondering whether there are any inbuilt settings in Lollipop which has this feature?
Basically I am worried that apps like Clean Master, etc. would be snooping around my msgs, contacts lists, pics and sending them to their servers.

Rooted OP6 user with an odd request involving app communication

I have a situation involving tinder. I managed to get myself banned through their platform by using sarcastic profile details that was violation of their policy. I kind of was playing with fire here as I had continued to see fake accounts make it onto the platform, and wanted to test their security. I basically ****ed myself.
So I've contacted them and they told me that my phone number and Facebook was banned. I used new phone numbers, Facebook accounts, play store account, a VPN, even a new device to see if they were able to ban based on the MAC address of the device. I still manage to get auto banned. So I think it was because tinder communicates with Facebook automatically. I am unable to use my Facebook on the device I use with a tinder account. My question is this: is there a way to block applications from communicating with each other behind the scenes, as in a way for tinder to not be able to see that Facebook is even installed. I know there has to be a way. I'm actually more interested in learning about this way than I am with using tinder. It's quite funny, actually. :laugh:
Are there any devs that know if there's a way to edit the coding of the program and how to do it? I do recall there being an app that allows you to change the structure of an app by altering it's values such as true to false or 000 to 001 etc.
Feel free to move this post or redirect me. I was gonna post this in the Android mods tab, but it says devs only so I figure I'd respect that fwiw.

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