Hello everyone, I'm developing a macOS application with an integrated Content Filter System Extension. Both the main app and the extension are signed with a Developer ID Application provisioning profile. When building in Xcode, I'm encountering an entitlement mismatch error. I've inspected the provisioning profile using the command: security cms -D -i FilterContentExtension-prod-profile.provisionprofile | grep -A 10 com.apple.developer.networking.networkextension And found that the com.apple.developer.networking.networkextension section only contains values with the -systemextension suffix, for example: content-filter-provider-systemextension. However, when I enable Network Extension → Content Filter in Xcode, the .entitlements file is generated with: content-filter-provider. This leads to the error: "Provisioning profile 'FilterContentExtension-prod-profile' doesn't match the entitlements file’s value for the com.apple.developer.networking.networkextension entitlement." My specific questions are: Why does this error occur? How can I use the content-filter-provider entitlement? If I want to use the content-filter-provider entitlement inside com.apple.developer.networking.networkextension for my Content Filter System Extension, what should I do?

Hi all, I'm struggling to identify the cause of a really strange issue that has started to plague our network of Mac devices. We use Cisco switches and have port security turned on which means any device that registers more than one MAC address triggers a port violation which then shuts down the port for a short period of time (5 mins I believe). A few months ago we suddenly started get lots of violations from Mac devices the were all registering additional MAC addresses (2 usually) that all had the same 6 character prefix (00:00:40). So far we've not been able to determine the cause and now getting pretty desperate and exploring all possible avenues. All we know id that prefix is registered to a company called Applicon from back in the day but is now shut down. Has anyone come across this issue or know of any possible reason why this may be happening? Thanks

Hi All, I am trying to write an NWProtocolFramerImplementation that will run after Websockets. I would like to achieve two goals with this Handle the application-layer authentication handshake in-protocol so my external application code can ignore it Automatically send pings periodically so my application can ignore keepalive I am running into trouble because the NWProtocolWebsocket protocol parses websocket metadata into NWMessage's and I don't see how to handle this at the NWProtocolFramerImplementation level Here's what I have (see comments for questions) class CoolProtocol: NWProtocolFramerImplementation { static let label = "Cool" private var tempStatusCode: Int? required init(framer: NWProtocolFramer.Instance) {} static let definition = NWProtocolFramer.Definition(implementation: CoolProtocol.self) func start(framer: NWProtocolFramer.Instance) -> NWProtocolFramer.StartResult { return .willMarkReady } func wakeup(framer: NWProtocolFramer.Instance) { } func stop(framer: NWProtocolFramer.Instance) -> Bool { return true } func cleanup(framer: NWProtocolFramer.Instance) { } func handleOutput(framer: NWProtocolFramer.Instance, message: NWProtocolFramer.Message, messageLength: Int, isComplete: Bool) { // How to write a "Message" onto the next protocol handler. I don't want to just write plain data. // How to tell the websocket protocol framer that it's a ping/pong/text/binary... } func handleInput(framer: NWProtocolFramer.Instance) -> Int { // How to handle getting the input from websockets in a message format? I don't want to just get "Data" I would like to know if that data is // a ping, pong, text, binary, ... } } If I implementing this protocol at the application layer, here's how I would send websocket messages class Client { ... func send(string: String) async throws { guard let data = string.data(using: .utf8) else { return } let metadata = NWProtocolWebSocket.Metadata(opcode: .text) let context = NWConnection.ContentContext( identifier: "textContext", metadata: [metadata] ) self.connection.send( content: data, contentContext: context, isComplete: true, completion: .contentProcessed({ [weak self] error in ... }) ) } } You see at the application layer I have access to this context object and can access NWProtocolMetadata on the input and output side, but in NWProtocolFramer.Instance I only see final func writeOutput(data: Data) which doesn't seem to include context anywhere. Is this possible? If not how would you recommend I handle this? I know I could re-write the entire Websocket protocol framer, but it feels like I shouldn't have to if framers are supposed to be able to stack.

What I want to do? I want to completely block network traffic for installed iOS apps. Hence, I need to filter network traffic based on the app, which executes this network request. Note that my app is created for personal use and learning purposes. How is this possible on iOS. Could you kindly point me into the right direction? What I don't want to do? Block network requests just by using the given domain names or using local VPNs. What I did? I skimmed through the Network Extension documentation and this forum. https://developer.apple.com/documentation/networkextension/content-filter-providers?language=objc https://developer.apple.com/forums/thread/692597 Thank you! BR, Markus

Hello, I have a question about developing an iOS app for general public. Can such an app use DNS Proxy Provider? The TN3134: Network Extension provider deployment article states that DNS Proxy Provider has the following restriction: "per-app on managed devices". Does this imply that a DNS Proxy Provider that can be used in a regular iOS App Store app? On the other hand, NEDNSProxyProvider only works with NEAppProxyFlow, is it possible to make it NOT per-app?

I was trying to log the flow description using control filter and data filter. But when I am trying to log the proc ID in control filter, it is always 0, but in data filter, it logs some value. Same goes with the eproc ID. I want to use the flow description data in some other target so I will be sending the data using sockets and I cannot share data from data filter due to its restrictions and control filter isn't providing the proc ID. What should I do?

We have a setup where the system uses proxy settings configured via a PAC file. We are investigating how NWConnection behaves inside a Network Extension (NETransparentProxyProvider) with a transparent proxy configuration based on this PAC file. Scenario: The browser makes a connection which the PAC file resolves as "DIRECT" (bypassing the proxy) Our Network Extension intercepts this traffic for analysis The extension creates a new connection using NWConnection to the original remote address. The issue: despite the PAC file’s "DIRECT" decision, NWConnection still respects the system proxy settings and routes the connection through the proxy. Our questions: Is it correct that NWConnection always uses the system proxy if configured ? Does setting preferNoProxies = true guarantee bypassing the system proxy? Additionally: Whitelisting IPs in the Network Extension to avoid interception is not a viable solution because IPs may correspond to multiple services, and the extension only sees IP addresses, not domains (e.g., we want to skip scanning meet.google.com traffic but still scan other Google services on the same IP range). Are there any recommended approaches or best practices to ensure that connections initiated from a Network Extension can truly bypass the proxy (for example, for specific IP ranges or domains)?

I have a single ssid that I would like to connect users to, which I can do easily with the NetworkExtension api. The only additional feature I want to add is being able to detect the availability of the ssid before connecting to it. I have checked the forums and looked through things like the Hotspot Helper Docs. From what I can tell, this just isn't possible. So, two questions I have: Is this definitely impossible? Any recommended alternatives for simulating this type of behavior? Thanks!

I have a requirement to create a VPN app which only works on Cellular. But I'm facing an issue like when wifi is ON, OS is using wifi interface to route the traffic instead of cellular. I tried some ways like let cellularParams = NWParameters.udp cellularParams.requiredInterfaceType = .cellular But this is not working properly as expected. How can I manually bind to cellular interface in iOS?

I added a Content Filter to my app, and when running it in Xcode (Debug/Release), I get the expected permission prompt: "Would like to filter network content (Allow / Don't Allow)". However, when I install the app via TestFlight, this prompt doesn’t appear at all, and the feature doesn’t work. Is there a special configuration required for TestFlight? Has anyone encountered this issue before? Thanks!

When I make a local network HTTP request, an error occurs. I'm sure I've granted wireless data permissions and local network permissions, and I'm connected to the correct Wi-Fi. This problem is intermittent, but once it happens, it will keep happening, and the only way to fix it is to restart the phone. Here is the error log: sessionTaskFailed(error: Error Domain=NSURLErrorDomain Code=-1009 "似乎已断开与互联网的连接。" UserInfo={_kCFStreamErrorCodeKey=50, NSUnderlyingError=0x30398a5b0 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 "(null)" UserInfo={_NSURLErrorNWPathKey=unsatisfied (Local network prohibited), interface: en0[802.11], uses wifi, _kCFStreamErrorCodeKey=50, _kCFStreamErrorDomainKey=1}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask .<63>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask .<63>" ), NSLocalizedDescription=似乎已断开与互联网的连接。, NSErrorFailingURLStringKey=http://192.168.2.1:80/v1/parameters, NSErrorFailingURLKey=http://192.168.2.1:80/v1/parameters, _kCFStreamErrorDomainKey=1})

Hi, I am trying to create an App which connects to a Device via Wifi and then has to do some HTTP Requests. Connecting to the Wifi is working properly but when I try to make an HTTP API Call I get the response that the Domain is unavailable (No Internet Connection). I created the App in Flutter on Android everything works perfectly. The packages are all iOS Compatible. But in Safari the URL works so it is probably a permission Issue. I have the Following permissions granted: NSAppTransportSecurity NSBonjourServices NSLocalNetworkUsageDescription I even have Multicast Networking When I test the App I get asked to grant the access to local Network which I am granting. I don´t know what I should do next can somebody help? Feel free to ask for more Information

i unfortunatly upgraded to Sequoia since then I see when: i select XCode ->Product->run i see Error: No route to host i cannot grant access to local network for XCode i can no longer debug my program as i did with Sonora

We are a Layer 3 VPN provider offering a comprehensive SASE (Secure Access Service Edge) solution that includes TLS inspection, threat protection, granular access control, and secure access to private resources. One of the key challenges we face involves TLS inspection. Many mobile applications, especially on iOS, implement certificate pinning, which causes them to fail when TLS inspection is applied. These apps expect connections to be secured with a specific certificate or trusted certificate authority, and inspection disrupts this trust model. On iOS, the current limitation is that the Packet Tunnel Provider extension does not provide visibility into the originating application (i.e., there is no API to obtain the app’s bundle ID or package name associated with a given network connection). Due to this, we are unable to dynamically determine whether TLS inspection should be bypassed for a particular app. While Apple’s Per-App VPN is one possible solution, it introduces a significant drawback: any applications that are excluded from the VPN configuration are entirely outside the VPN tunnel. This means they do not benefit from any of our SASE features — including secure access to internal resources, DNS/web content filtering, or threat detection. This limits the effectiveness of our solution in environments where both inspection and secure access are critical. We would like to understand whether iOS has any current or planned capabilities to associate a network flow (e.g., a 5-tuple: source IP, destination IP, source port, destination port, and protocol) with the originating app. Such a capability would allow us to programmatically identify certificate-pinned apps and selectively disable TLS inspection without excluding them entirely from the VPN, thereby preserving the full set of SASE protections. Is there any guidance or roadmap update from Apple that addresses this use case?

I have checked the storage space of my phone. There is still over a hundred gigabytes of space left. An error occurred when the app was checking the network interface status. The error message is as follows:Error : Error Domain=NSPOSIXErrorDomain Code=28 "No space left on device" UserInfo={_NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <7DB1CBFD-B9BE-422D-9C9A-78D8FC04DC1B>.<76>, _kCFStreamErrorDomainKey=1, _kCFStreamErrorCodeKey=28, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <7DB1CBFD-B9BE-422D-9C9A-78D8FC04DC1B>.<76>" ), _NSURLErrorNWPathKey=satisfied (Path is satisfied), interface: pdp_ip0[lte], ipv4, ipv6, dns, expensive, estimated upload: 65536Bps, uses cell}

Hello, I'm running into an issue while developing an iOS app that requires local network access. I’m using the latest MacBook Air M4 with macOS sequoia 15.5 and Xcode 16.1. In the iOS Simulator, my app fails to discover devices connected to the same local network. I’ve already added the necessary key to the Info.plist: NSLocalNetworkUsageDescription This app needs access to local network devices. When I run the app on a real device and M2 Chip Macbook's simulators, it works fine for local network permission as expected. However, in the M4 Chip Macbook's Simulator: The app can’t find any devices on the local network Bonjour/mDNS seems not to be working as well I’ve tried the following without success: Restarting Simulator and Mac Resetting network settings in Simulator Confirming app permissions under System Settings > Privacy & Security Has anyone else encountered this issue with the new Xcode/macOS combo? Is local network access just broken in the Simulator for now, or is there a workaround? Thanks in advance!

I am creating an application that needs to connect to an Iot device, so i want to make a wifi hotspot with a custom SSID and password and WPA3. Could you please provide an example code in Objective-C to get started?

I am trying to commission an ESP32-H2 Matter device using the chip-tool. It's running the Light Switch sample. I can commissioning it using the iOS Home App, so I know the code on it's working okay. I would like to understand more about the Fabric process, so I'd like to use the Home Pod powered Thread network rather than setting up an instance of Open Thread Border Router. I have created a simple iOS app and can fetch the activeOperationalDataSet from the Preferred network using func obtainPreferredNetworkCredentials() async -> (Void) { let client = THClient() let bIsPreferredAvailable = await client.isPreferredAvailable() if bIsPreferredAvailable == true { var credential: THCredentials? do { credential = try await client.preferredCredentials() if let dataset = credential?.activeOperationalDataSet { print(dataset.hexDescription) } } catch { print("Failed to get the credentials") } } } The hexDescription comes from this extension extension Data { var hexDescription: String { return reduce("") {$0 + String(format: "%02x", $1)} } } I am decoding the Data and displaying it as a hex string. It looks something like this: 0e080000000000000000000300001935060004001fffc002089f651677026f48070708fd9f65167702000ee90914b5d1097de9bb0818dc94690c0402a0f7f8 However, when I attempt to commission the device, it fails during ThreadSetup. Googling the issue says most likely the Operational Dataset is wrong in some way. Before I spend too much time on this, I want to make sure I'm doing the right thing in terms of getting the Operational Dataset to use with the chip-tool. Any help is appreciated!

Hi! I've noticed that the IP_RECVIF socket option, i.e.: int y = 1; setsockopt(fd, IPPROTO_IP, IP_RECVIF, &y, sizeof(y)); does not seem to work if the socket is proxied by a NETransparentProxyProvider type network extension: there's no ancillary data in messages received with recvmsg. As soon as I disable the network extension, recvmsg starts returning ancillary data containing the interface name. This seems to break some applications which rely on IP_RECVIF in the presence of a transparent proxy, making it, in fact, not transparent. One such example is Apple's own libresolv, which relies on IP_RECVIF and breaks if there's no ancillary data in the recvmsg result. I don't think that this is the intended behaviour, since IPV6_PKTINFO seems to work fine. I've filed a bug report (FB17586550) about this, however, I would greatly appreciate if someone could point me in the direction of a workaround.

I have an NEPacketTunnelProvider that's configured using NEPacketTunnelNetworkSettings. I'm using NEDNSSettings to configure the DNS resolver of the packet tunnel, and would like to specify the exact domains that should use this resolver using the matchDomains member variable. While it's not explicitly mentioned in the documentation [1], I've noticed that if a domain is present in matchDomains, then all subdomains of it will also be resolved using this resolver, as if a wildcard match rule is in place. I wanted to ask if this the intended behavior, and if so, is there any way to disable it so that only exact domain matches will be resolved? I.e., if "example.com" is in the matchDomains list, I would like requests for this domain be resolved using the configured DNS resolver, while ignoring requests to the subdomain"test.example.com". [1] https://developer.apple.com/documentation/networkextension/nednssettings/matchdomains