I need to configure a OpenWRT-Router ( TP-Link WR1043ND v1.2 ) to create a separate network with internet access only.
I cant figure out how to allow just internet, or, disallow device recognizing from LAN > to > WAN.
If I connect a client to the LAN Ports of OpenWRT-Router, the Internet working and I can (unfortunately) reach the ISP-Router's network and all of his clients.
I dont want that OpenWRT´s LAN network can reach the ISP-Routers network. It is even possible on openwrt to archive that? When possible, how?
Related
Currently my program use the IP of the other device in order to communicate over grpc.
Unfortunately the IP is changing all the time and I cannot continue the connection between the devices without updating it manually.
The connection between the devices is only on LAN and should blocked access from WAN.
Locking the IP of the device in the rowter settings is not an option this time.
Does grpc have a way to communicate over LAN (inside my network) using identification number or mac address that does not change over time?.
Related questions I found:
grpc: Identify clients from same IP address
Reason for both a MAC and an IP address
In order to locate a machine based on its MAC address, you are talking about implementing ARP. This is something that is not supported in dart nor am I sure it would be advisable to go this route anyway. If setting a DHCP reservation on your router is not an option, are you able to skip DHCP and set a static IP on the receiving machine?
You could look into dynamic DNS which your router may support, or you may need to set up separately, but that will also require a static IP (for your DDNS server). If your machines can connect to the internet there are many DDNS services you can sign up for, but it sounds like that is not the case.
I need to create a wireless network with no Internet access with a Pi, because I need to communicate to it with an Android smartphone and a laptop, but being the RPi the highest step in the network hierarchy.
I've found -and tried- that I can do an adhoc network, but I am unable to connect to it with the smartphone. The other alternative is creating a Wi-Fi hotspot, with no NAT, but I don't really have a deep knowledge on networks so I'm really lost in which IP adresses I have to set.
I've followed this tutorial, and found it really useful. Could anyone tell me what should I modify from it to make it only local -apart from not doing the NAT?
The Rapsberry Pi 3 has built in Wi-Fi that can serve as an access point. Based on my experience, with the Pi acting as an access point, you should be able to connect to any device, be it Android or not.
The Pi will act as access point and serve as a DHCP daemon, assigning and handling IP addresses to any devices that connect to it. This will be a standalone network and will not be able to share an Internet connection unless you bridge it. Follow this tutorial up until the Internet sharing part:
https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md
Also, it would be better to ask this in the Raspberry Pi stack exchange.
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.
I have ip addresses of two different iOS Devices which are connected to Internet. Now, I want to establish a peer-to-peer connection between them.
I had done this locally with Wifi and it worked properly. But I dont know how to establish this connection with an IP address. I want that I can connect them from anywhere, so I need to connect via Ip address. Also, is this possible without developing any server? Please help. Thanks.
I couldn't find any exact solution for this problem but one approach could be you can have two ios devices connected with a network having same public IP.
So indirectly both ios devices will be connected to the same network.
What you had done with wifi is probably an Ad-Hoc connection. Ad-Hoc is when you connect 2 wifi devices without any Access Point in the between.
You do not have to do that on the Internet, your devices are already connected to a network. What you need to do is to find out what their IP addresses are and provide them to eachother.
In case your iOS devices are NATed behind a router, you must forward the port which you want to use from the router to the iOS device.
Here are guides for port forwarding for all the existing routers: http://portforward.com/
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.