Is there an app or clever way to check TCP:IPv4 traffic for a host:port on iOS devices? Users will be connecting to a device with an iOS app, and if there is an existing way to sniff or otherwise log TCP (and any IP traffic) on an iPad that would be super useful. We could eventually add this into the app, but it seems like there has got to be a nice app for inspecting a network... e.g. some of the functionality of wireshark, socat, and nmap. I don't seem to be able to use the right search terms in the app store and I'm also wondering if there is a way to do this in the Safari browser?
I ended up using iTelnet and turning off all the login scripts. That will connect to any ip:port with TCP.
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I am working on a NetworkExtension which uses the NEPacketTunnelProvider to provide VPN-like tunnel so I can modify the traffic.
This works great for basically all the apps I tried so far, but Facebook Messenger seems to be able to ignore it. I first see that the traffic goes through the tunnel, should be blocked (for testing), but then the messages are successfully sent anyway.
To me this suggests that Messenger first goes through the tunnel and when that does not work, it has some kind of fallback. This happens whether I am on Wifi or cellular data. At first I thought that it may somehow fallback to cellular when WiFi does not work, but even when I disable cellular on the iOS level, Messenger still works when the tunnel is active.
I tried getting all the system routes (meaning the IPs and masks) and manually setting them to includedRoutes on the NEIPv4Settings but this has no effect.
Does this look like the Messenger is indeed bypassing the VPN tunnel? Or maybe something else is at play?
So far I have tried basically all configuration combinations and nothing seems to affect Messenger in any way. Apps like Signal, Instagram, YouTube and other can be successfully cut off the network with the tunnel.
EDIT: Found this on the official Apple forums: https://developer.apple.com/forums/thread/122330
Actually Facebook Messanger sends traffic to all active interfaces in iOS. It even sends tarffic out trough Cellular, when mobile data is disabled from settings.
EDIT 2: I tried the new iOS 14 configuration option includeAllNetworks which seems to work for Messenger but somehow messes up other apps like Signal or WhatsApp.
When I don't have this flag on, Signal work with my VPN on and I can see its traffic, but when I enable this flag Signal does not send messages nor receives them.
Apps can use low level API and force traffic via some interface (using bind for example), and go outside your VPN.
The way to enforce using the VPN is to enable the flag includeAllNetworks on your VPN configuration -
manager.protocolConfiguration!.includeAllNetworks = true
In short i'm trying to build an App that will grant/block wifi access to my son's wifi for his Ipad and his PS4 remotely using an App. I researched the topic and can't figure out how this can be done. Ideally i'd like to be able to grant/block wifi access independently Ie. block wifi to the Ipad and allow PS4.
How can this be done, no need for the full code ( well if you insist i'll take it ) but just point me in the right direction.
Depending on the router you're using you're going to need to write something that interacts with the router's API, if it has one. If it doesn't, you will need to replace the firmware on your router with something like ddwrt that can be scripted. From there, you might be able to create an app that talks to the router's API.
TLDR: You're probably better off simply bookmarking the management page for the router and enabling/disabling access for the devices.
Edit:
It occurred to me that some mainstream consumer router/access point manufacturers (Linksys, Asus, etc) have companion apps for managing their devices from the LAN side. You should see if such an app exists for your router, and if not, perhaps consider getting a different router that supports such an app.
Hi StackOverflow community.
I am beginning a new project and was wondering if I could get some insight on VPNs and iPhones.
I want to create a VPN so that I can route all of my network traffic through it from my iPhone. I also hope to log each request that was routed through the VPN? (Similar to Hooked)
I am not sure where to start - any insight would be helpful!
Here is my initial plan:
1) Create a VPN (what should I use to create it?)
-How to accept iPhone request?
-How to route all requests to where they need to go?
2) Hook VPN up to iPhone and route all traffic through it
This is actually not a programming, but a network question. So you might rather post a question over at serverfault.
You need a VPN server that in best case, has a fixed IP. From your iPhone you connect to this VPN via the external IP. If you don't have a fixed one, you'd need to update the IP from time to time or use DynDNS or something similar, but they're not perfect, as far as I know.
You configure & connect the VPN within the iPhones Settings app (General → VPN)
Within the VPN your iPhone gets assigned an IP address within the IP range of your private network (e.g. 10.0.0.xxx).
All the devices traffic gets routed through the VPN. When you have extensive logging on the VPN sever, you should be able to get a log of these requests.
EDIT
This is all really broad and generalized. But as mentioned, this is mostly about VPN Sever configuration and, thus cannot be further discussed here on SO.
I have two entities which I would like to be able to start a communication:
Hardware Device Using Atmel ATSAMS70 and WINC1500 Wifi Module
HTML 5 App
The idea to have a HTML 5 app is to be able to communicate easily with most of the commercial devices like: Windows computers, Android Phones, Mac OSX computer and iOS devices. Apart from that, I would avoid working with native code at all.
Currently, they can talk with each other using WebSockets but somehow the IP address of the custom board has to be known from HTML 5 to initiate the communication.
In order to do this, I can think of 3 options:
Using WebRTC I can get the local IP address of the browser and then I could do a scan of the local devices considering a 255.255.255.0 network mask.
Have an external server that the hardware device can send its local address which will be later retrieved by HTML 5.
Using Bonjour or some sort of device discovery service between the board and HTML5.
I could not find a way to achieve #3 but #2 seems feasible to me. #1 is what I am doing now, but WebRTC is currently not supported on iOS.
So, is there any other better possibility to achieve this communication?
You don't mention how the WINC1500 unit is being connected to the network but presumably this is in STA mode (acting as a wifi station rather than becoming a software access point or part of an ad-hoc network) and is being provided with its IP details through an existing access point?
Ordinarily I'd suggest that once connected, the device ought to start indicating its availability on the network via a regular UDP broadcast on a specific port but my (admittedly limited) understanding of WebSockets it is that it creates TCP connections. The only implementation of Bonjour that I've seen uses UDP messaging too, that may be why you've had trouble with your third approach.
Your second approach seems more likely to work well. A server at a known (or discoverable) IP on the local network which allows the Atmel device to register itself (and its IP address) and also allows other applications (your HTML 5 WebSockets applications) to request that connection information to allow them to create the WebSocket TCP connections they need.
I suppose that doesn't really answer your question as to "Is there a better way?", other than to say "Not that I can think of, your second approach looks good to me...". Sorry! Sounds like a very interesting project, overall,
Is there any way to communicate between two devices or application with Browser of other devices without having Server in the middle?
If I explain, actually I want to share data between iPhone application and Browser of Desktop, I tried HTTPServer, & played with WebSocket too, but in these case this server plays an important role in between. So If somehow I exchange data between two peers like IP Address, Port number, Then Is it possible to communicate between those two devices using Wi-fi channel without having Server in Middle?
The Way, Right now I have implemented.
The way, I am looking for.
I recently came across http://www.freedomjs.org/ which is suppose to provide p2p functionality in the browser.