Usb internet key & Raspberry: disable internet connection, used only for sms - connection

I would like to use a USB internet Key Huawei E3531i for send and receive SMS.
I'm working on it, I can send but I have some issue receiving but this is not the topic of this thread.
When I plug the USB stick the Raspberry (connected to wireless lan) doesn't have access to internet any more. Most probably because somehow the internet key is considered as preferred connection but I don't have idea how to change this.
The best for me would be that the USB stick is not used at all for internet connection, even the wireless lan is not available.
How to configure this?
Thanks
Andrea

SOLVED!
Editing the file: /etc/dhcpcd.conf
Adding the metric for each interface. In this way I can drive the priority of routing for internet connection:
interface wlan0
metric 200
interface eth1
metric 300
The smaller number has higher priority.
Now I'm able to reach the internet key with his static ip address but also connecting to internet because the default interface is the wifi.
Bye
Andrea

Related

Can devices connected to the same Wi-Fi communicate with each other without using data for accessing the internet?

I need to enable multiple devices to communicate with each other using OSC protocol which runs over IP protocol etc.
I have two wireless routers, one of them is capable of providing internet access from SIM card.
What I want to accomplish is:
provide all devices wireless connection for communication between each other
provide all devices connection to the Internet
avoid spending data from SIM card when my devices communicate with each other
This last point is what I can't solve - in my mind it should not be a problem. If I understand it correctly, I am creating a WLAN and there is no need for passing the data to the internet provider (or asking for data from him) and the router should act like a switch and route the signal from one device to another one if the IP and port is correct.
I have router TP-Link Archer C6 ; router TP-Link Archer MR200 ; Windows laptop ; Android phone ; iPad.
What I want to accomplish is remote control of DAW Reaper (running on Windows laptop) over Web Control Surface or OSC Protocol with TouchOSC app or Open Stage Control app.
I will appreciate any help!
Thank you very much in advance,
Peter

Internet connection problem from different network for NodeMCU ESP8266 which I am using for IOT home automation

Would anyone like to help me with this problem please?
how to connect/control Nodemcu esp8266 wi-fi module from different network for control iot devices from outside of any home/ house?
Internet connection problem from different network for NodeMCU ESP8266 which I am using for IOT home automation.
Actually, in case of an class project, I have used some code (also coppied some code and took help from some website) from internet and also used Blynk for controll my ESP8266.
But not i want to make a personal app by which app I can control my devices outside from my home.
I have already connected with my WI-FI router with my home network!!
It worked well,
But i don't know how to do the same thing from different netwrok.
If possible I think anyone can help me....
Thank you.
To everyone.
This has been answered in greater detail on both the Arduino and Internet of Things StackExchange sites. In summary:
For safety, it is difficult to start a connection to a device on another local network. Devices on WiFi networks are protected from the Internet by a firewall, which is normally configured to return responses to requests sent by the devices, but block all unsolicited messages. Even if the firewall allows an incoming connection on a given port, "port forwarding" or other custom configurations are needed for unexpected messages to reach one of the multiple devices on the network (the devices usually share the same public IP address of the network and external systems' messages cannot reach the right local address without forwarding by the router).
Any device exposed to unsolicited requests like this is at risk of being attacked and can pose a risk to other systems on the network. It is thus safer to leave the firewall the same and instead make the device subscribe to an external webserver, which acts as a mailbox for incoming messages. Then, you can send requests to the server from anything with an internet connection, and the server will store them and relay them to the ESP8266 whenever the ESP asks. MQTT protocol using a server-side broker program like Mosquitto and a client like PubSubClient on your ESP8266 could work for this sort of publish-subscribe model, and MQTT tutorials and explanations are available both on both tool sites and Stack sites.
You can use Arduino IDE to program ESP8266 device.
https://randomnerdtutorials.com/how-to-install-esp8266-board-arduino-ide/
After installing ESP8266 in Arduino IDE. You need to connect ESP8266 with WiFi router(which have internet connected). Once your device is connected with a WiFi router. you can MQTT protocol to communicate with the server. You can use the following library in Arduino to implement MQTT client in ESP8266. ESP8266 is used to send and receive data from a different network. ESP8266 is subscribed to a particular topic. You can publish data to that topic from different MQTT client.
https://github.com/Imroy/pubsubclient
Use the Following link to get more familiar with MQTT protocol
https://www.hivemq.com/blog/mqtt-essentials-part-1-introducing-mqtt
You can use MQTTfx desktop application to send and receive data from NodeMcu(ESP8266).
MQTT basic diagram for understanding

Use SNMP and Access point wifi

I am not an expert of the network domain.
Today I have a network with a connection to the Internet. Some computers use an ethernet connection, others use the WIFI.
I wish to monitor the network because we have a slow connection.
I plan to add a switch with SNMP in front of my modem.
If I connect an access point wifi on the switch, would I be able to differentiate the different computers connected in wifi ?
Thank you,
Any network equipment that has the BRIDGE-MIB RFC 1493 implemented will let you check which port is doing what on your network. You would want a switch/router that is also an access point, or if separate equipment, then the access point needs the BRIDGE-MIB.

Are Wi-Fi Direct and Wi-Fi P2P the same?

Maybe this is a stupid question but..
Are Wi-Fi Direct and Wi-Fi P2P the same thing?
And I mean, the EXACTLY same thing?
I'm getting really confused with this two.
Wifi Direct is a technology for peer to peer connections and is very different from wifi. Wi-Fi Direct, initially called Wi-Fi P2P, is a Wi-Fi standard enabling devices to easily connect with each other without requiring a wireless access point.It is usable for everything from internet browsing to file transfer
Wifi Direct is not same as wifi . On Jelly Bean and above, when you try to use the WifiP2pManager API, WiFi-Direct is automatically enabled (as long as WiFi is on). Wifi can be switched on by calling:
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); wifiManager.setWifiEnabled(true);
For ICS refer to this Can I turn on WiFi-Direct from code? on Android API-14 (ICS)
This is the main reason to get confused between the two.

How can I configure Wireshark to see HTTPS traffic?

I'm testing an iOS application and I just want to see when HTTPS traffic is sent. I'm not interested in the contents of the traffic. How can I configure Wireshark to do this?
This is just to verify that an analytics package is working. I don't have any control over the servers that my app is talking to.
Thanks!
Edit #1: My current Wireshark configuration can see traffic to http://www.duckduckgo.com but not https://www.duckduckgo.com
An alternative is using your Mac as a Wi-Fi access point and sniffing the traffic with TCPDump. Here are the steps:
Connect your Mac to your router using an Ethernet cable (the Wi-Fi card will be busy working as access point). Or skip this step if you only want to sniff traffic from the app to your own computer.
In the Wi-Fi icon of your toolbar, click Create Network. Give it a random name, select security, and set a password.
In System Preferences > Sharing set To computers using: Wi-Fi. In Wi-Fi Options... choose the network you created before. In Share your connection from:, choose the interface you are getting Internet from, usually Ethernet.
Enable Internet Sharing, and connect to this new Wi-Fi network from your iPhone.
Disconnect 3G on your iPhone from Settings > General > Network and check your Internet with Safari. Sometimes it takes a few seconds.
In your Mac type sudo tcpdump -s 0 -A -i en1 port 443 > log.txt. Use ifconfig if you have a network interface other than en1. The log generated can also be imported by WireShark (which is a GUI version of tcpdump).
Now all Internet traffic from your iPhone will be recorded.
TCPDump is included with all versions of OS X. For other options, see Technical Q&A QA1176 Getting a Packet Trace.
If you want to decrypt the SSL traffic in order to listen in on it, have a look at the Wireshark Wiki. The explanation is a bit longer, but enables you to decrypt SSL traffic.
You also might want to listen on port 443 instead of 80.. :-)
Set following as a filter after you've started capturing the appropriate network interface:
tcp.port == 443 || tcp.port == 80
This will ensure display of data for only http & https connections that you can further inspect.
Yes. Wireshark can watch any and all ethernet traffic made available to it. The issue to solve is whether the machine running Wireshark will see all of the ethernet traffic you are interested in detecting the presence of.

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