i want to see whole router traffic network.
How i can do this with wireshark? :)
I can see my Wireless network card:
List of Adapters
but i want see my Router network traffic.
Please help :)
Depending on your router model (I assume you have a standard home ISP router), you should be able to mirror your Router's traffic into a particular LAN port on the device. This will act as a sort of "LAN-TAP", and will mirror all traffic flowing through the Router to that port.
Here is an article explaining it.
However, you should ask yourself whether or not this is particularly necessary.
Most home routers are realisticaly, just a switch that acts as a PAT Router for your ISP. You can't do any funky routing on your own LAN with them, so this router is just sitting back and forwarding packets that are travelling over the LAN. This means that due to your home router broadcasting packets from devices on the network, the packets are naturally going to be hitting your network adapter too, which will be visible on Wireshark.
However, if you are wanting to be viewing packets that are being routed by your Router to Outside the network, go ahead and enable port mirroring.
Related
When I'm connected via cable to the building's network socket I can see all other computers in the network.
Now I introduced a router and can only see computers in the router's sub-network. Is there something I can do to be able to see other computers in the network to which now router is directly connected?
I disabled firewall on the router.
Cheers
Router is a Layer 3 device for routing network traffic between networks. But not broadcast by default. So you can see only PCs in your subnet. Because broadcast is allowed. So you have to find a solution how to allow the broadcast traffic in your router. If it not possible you can't get what you want by simple solution.
Good day
Do you have any idea how to find WIFI routers or devices which is connected to specific LAN sockets in network?
I am try find this devices from logs Elasticsearch + Kibana namely
https://www.elastic.co/guide/en/beats/packetbeat/current/configuration-interfaces.html
With this solution I have problem with set up : packetsbeats.
Other solution which I found is : WireShark or Advanced IP Scanner or Angry IP.
With this solution /tools is problem with default setting of routers / devices which is lock ports. Its mean I can get all IPs or MACs in network but how I will get know which is IPs or MACs belonging to Routers / NTB / Mobiles ect..?
From this reason I decide find routers in network from logs by Kibana.
Do have any idea or did you make something like me?
Thanks
Wi-Fi (IEEE 802.11) is a layer-1/2 protocol, but routing is a layer-3 function, so there really is no such thing as a Wi-Fi router. There are some routers that have Wi-Fi interfaces, but they are routing a layer-3 protocol, e.g. IPv4, not Wi-Fi. Ports are layer-4 addresses for some layer-4 protocols, e.g. UDP, and they have nothing to do with routing layer-3 packets.
A router is simply a host on a layer-2 LAN. The configured gateway for your host is usually a router. The gateway is the host on a LAN to which your host sends packets destined to a different network.
Determining which hosts on a LAN are routers is a problem because you have no way to know which hosts are actually routers. You can have multiple routers on a LAN, but your host will be configured with one as its default gateway.
If you want to determine which host is the gateway for your host, then you should look at the configuration of your host, not at any particular host on the LAN.
I am using a Juniper firewall device that our incoming internet connection receives, then a switch that connects a bunch of servers that is connected to the firewall.
For some reason, some of the traffic between the hosts connected to the switch are showing up as sessions on the Juniper firewall. The hosts are using the same network address. I thought the traffic should be strictly going through the switch to other host, not out to the firewall and then back to the switch then the host.
I created a test environment, with a small switch, and the traffic between the hosts did not show up on the firewall sessions.
Is there anything particular to the Cisco SG200-50 that would cause traffic bound from one port to another, same network address, to be sent out to the firewall before switching the traffic to the other port?
The switch will not be looking at the layer-3 packet, it only delivers known unicasts to the port where the destination MAC address is located. It will flood unknown unicasts and broadcasts to all switch ports, including the router. To the switch, the router is just another host.
I have seen this when one or more hosts have either an incorrect mask or an incorrect gateway configured.
Is there a way to find out the IP address of a device that is directly connected to a specific ethernet interface? I.e. given one host, one wired ethernet connection and one second host connected to this wired connection, which layer or protocol below IP could be used to find this out.
I would also be comfortable with a Windows-only solution using some Windows-API function or callback.
(I know that the real way to do this would probably via DHCP, but this is about discovering a legacy device.)
Mmh ... there are many ways.
I answer another network discovery question, and I write a little getting started.
Some tcpip stacks reply to icmp broadcasts.
So you can try a PING to your network broadcast address.
For example, you have ip 192.168.1.1 and subnet 255.255.255.0
ping 192.168.1.255
stop the ping after 5 seconds
watch the devices replies : arp -a
Note : on step 3. you get the lists of the MAC-to-IP cached entries, so there are also the hosts in your subnet you exchange data to in the last minutes, even if they don't reply to icmp_get.
Note (2) : now I am on linux. I am not sure, but it can be windows doesn't reply to icm_get via broadcast.
Is it the only one device attached to your pc ?
Is it a router or another simple pc ?
To use DHCP, you'd have to run a DHCP server on the primary and a client on the secondary; the primary could then query the server to find out what address it handed out. Probably overkill.
I can't help you with Windows directly. On Unix, the "arp" command will tell you what IP addresses are known to be attached to the local ethernet segment. Windows will have this same information (since it's a core part of the IP/Ethernet interface) but I don't know how you get at it.
Of course, the networking stack will only know about the other host if it has previously seen traffic from it. You may have to first send a broadcast packet on the interface to elicit some sort of response and thus populate the local ARP table.
Windows 7 has the arp command within it.
arp -a should show you the static and dynamic type interfaces connected to your system.
Your Best Approach is to install Wireshark, reboot the device wait for the TCP/UDP stream , broadcasts will announce the IP address for both Ethernet ports
This is especially useful when the device connected does not have DHCP Client enabled, then you can go from there.
You can also get information from directly connected networking devices, such as network switches with LDWin, a portable and free Windows program published on github:
http://www.sysadmit.com/2016/11/windows-como-saber-la-ip-del-switch-al-que-estoy-conectado.html
LDWin supports the following methods of link discovery: CDP (Cisco Discovery Protocol) and LLDP (Link Layer Discovery Protocol).
You can obtain the model, management IP, VLAN identifier, Port identifier, firmware version, etc.
Summary: I'm trying to create sockets to pass data between two physical interfaces that exist on the same machine, and Win32 sockets always forwards the traffic directly in the kernel instead of pushing through the physical interfaces. Is there any way to disable this behavior, perhaps through device settings, registry tweaks, routing table shenanigans, or socket options? We're using Windows XP SP3.
Some background. I'm attempting to build some completely automated IP tests to exercise our custom IPv4 equipment. We have a large lab of Windows XP machines, and individual physical ethernet interfaces for each device we're connecting to. Our devices are effectively ethernet routers each with their own IPs.
We need to send data out our lab machines, through our devices, then back into the same computer. We will be sending Unicast and Multicast UDP, TCP, and broadcast IP traffic through the devices.
We want (and likely need) the traffic to originate on the same machine it is destined to.
To do this, we configure two separate NICs each with their own IP on their own subnet, for instance NIC #1 with 10.0.0.1/24 and NIC #2 with 10.0.1.1/24. Our devices then act like simple passthrough routers, and have two interfaces, one on the 10.0.0.0/24 subnet, one on the 10.0.1.0/24 subnet, which they just forward packets back and forth from.
To generate our data, we'd like to be able to use Win32 sockets, since it is well-understood, well-supported, what our customers are using, and would probably be the most rapid approach. Packet injection is probably feasible for UDP and broadcast IP, but very likely not so for TCP. I'd entertain ideas that used packet injection, but would strongly prefer standard Win32 sockets.
As stated in the summary, the packets never leave the machine. I've googled like a madman and I've not found much. Any ideas?
Use Windows' command-line ROUTE utility. You can configure it so any IP packet sent to a specific IP address on a specific Subnet gets sent to another IP/device. For example:
route ADD <NIC_1_IP> MASK <NIC_1_SUBNET> <DEVICE_IP_CONNECTED_TO_NIC_2> METRIC 1
route ADD <NIC_2_IP> MASK <NIC_2_SUBNET> <DEVICE_IP_CONNECTED_TO_NIC_1> METRIC 1
Alternatively, if you know the index numbers of the NIC interfaces, you can specify them instead:
route ADD <NIC_1_IP> MASK <NIC_1_SUBNET> METRIC 1 IF <NIC_2_INTF>
route ADD <NIC_2_IP> MASK <NIC_2_SUBNET> METRIC 1 IF <NIC_1_INTF>
This way, whenever a packet is sent to NIC #1's IP, the packet goes to the device connected to NIC #2, which will then pass it on to NIC #1. And vice versa for packets sent to NIC #2's IP.
For instance, this is a useful technique for allowing WireShark to capture local IP traffic if the PC is connected to a network with a router. Packets from one local IP/Port to another local IP/Port can be bounced off the router back to the PC so they travel through physical interfaces that WireShark can monitor (WireShark will see duplicate copies of each local packet - one outbound and one inbound - but you can filter out the duplicates).
Winsock is always going to bring the packet data up into the kernel space and deal with it there. Thats the whole point to a generic API is that any device is dealt with at the same "layer". If you want to stick with Winsock, I don't believe you can (or would want to) work around this behavior.
You can remove some of the buffer copying with TransmitPackets or TransmitFile, but not between two device interfaces.
That being said, are you having a performance issue with the additional buffer coping that Winsock performs? Security concerns?
How about running the endpoints of your tester inside of distinct virtual machines? Then you need only a single piece of hardware, but you'll have separate TCP/IP stacks that don't know each other are local (and most VM solutions pass the packet straight through the host unchanged, I don't think the host is going to grab the packet and send it straight to another VM unless you configure bridging between VMs... but you'll bind each VM to a different physical network adapter).