snmp network simulator like ciscos packet tracer? - networking

Im looking for a network simulator similar to ciscos packet tracer but does more types of devices then just ciscos. Anyone know of a such program? Im not wanting to actually send fake traffic over my network but emulate a fake network within one computer.
I would give you two points if I could for anyone that lists open source links.

Found GNS3 and it works great and can even send out fake packets on a virtualized network or the fake network limited to the gui in the software.
Found GNS3 except I can not figure out how to add a pc to configure.
Anyone know how to do so? They list a tutorial but not one with virtual pc or virtual box.
Edit:
heres the GNS3 website to download their program:
http://www.GNS3.net

Related

Why can't I run two USB serial adaptors on the same machine?

My work involves interacting with legacy hardware that uses serial ports. I often have to monitor more than one serial line, and for the purpose I have a couple of the common USB serial adaptors. When I connect both of them to the same (Windows 10) machine, irregularities show up. Both ports show up in device manager, but only the first one that I plug in to the USB connector works. The other one indicates port not open when I try to send data via RealTerm.
I have also seen the situation where when I plug the second adaptor in, its port comes up, but the one for the other adaptor disappears. Does anyone know a way that two devices can happily coexist on the one machine? Thanks in advance.
Just ion case this helps anyone in the future......
The problem seems to be caused by the fact that one of the adaptors was coming in via a (powered) USB hub. When I liberated another native port on the machine so I could host both serial adaptors directly, everything worked fine.
Not worth hunting the cause down, a solution is at hand.

How to extend Sony Remote Camera API access point range?

Just for reference the Sony Remote Camera API only works by using a 1:1 Wifi Connection
The Wifi signal strength of my Sony DSC-HX60V camera already drops after a few meters distance. But I want to be able to remotely control the camera over a range of 50 meter. There is no way that the onboard Wifi can achieve this range.
So now Iam looking for a solution to this problem. If it helps a local Wifi router exists that covers the whole range:
A normal Wifi repeater seems to be the best option, but according to a Forum Post using a repeater does not work, because the repeater acts a client and the camera can only connect to one client at the same time. Did someone got it to work with a repeater?
Additionaly I was thinking about using a Raspberry Pi with a second Wifi adapter that connect to the local Wifi and manages the API requests.
Any other ideas?
Disclaimer:
Even tho this Question may be more Hardware and Network related and thereby fits more into the SuperUser Network. A working Network connection does not necessary imply that the API is working aswell. This is why I posted this Question here
If you have a router which can work in 'client mode' that should be able to make a 1:1 connection with the camera, and then present that link over ethernet - you may have issues with network addresses and/or discovery if your main network is a different IP range to what the camera offers/DHCP's.
Some of the Sony cameras support 'multi-wifi' where the camera connects to an external device (normally the LiveViewRemote, but can be a router). Unfortunately the HX60 (and presumably any of the Play Memories SmartRemote app based ones) does not seem capable of this.... maybe the QX1 is an exception as it's supposed to work like this.
This connection connection is managed via WPS, and once connected the RemoteAPI works well. Works for my AS100.
If you are looking to set up a RaspPi, I can confirm that it works with this Python library:
https://github.com/Bloodevil/sony_camera_api
https://www.youtube.com/watch?v=xR3gAfu4Hfw

TCP Networking and Desktop Applications

I made a two players "paint", it's like black screen and you draw with only one color, thats it. Your friend does the same. I've used Qt C++ for GUI and SFML for the drawing part. And for networking, I'm really new at this, I followed SFML guides about TCP socketing thing and its working really fine at the moment. Only problem is, I must open a port to be server, so my friend can connect me with my ip and with the port I've opened. It's ok when I use it but if I want to share this program with everyone, some people will have bad time when they can't open port.
Is there any other way to connect without opening port to be server, OR Is there any port that every computer already allows you to use it. We tried port 80 but it doesn't seem like working.
You have several options:
Open different ports for different clients.
Serve them on the same port in different threads.
Serve them on the same port in different processes.
Serve them on the same port in an async manner.

Lightweight network visualization tool

I've been trying to find a tool for monitoring my home network. Before I go into the details, I've looked at a ton of different software and they're either an overkill or don't have what I'm looking for. Hopefully the community can help me with some advice.
My network is quite small. It consists of a modem connected to a D-Link DI-524 router. To this router I have a number of computers hooked up wirelessly.
What I'm looking for is a lightweight tool for monitoring my traffic. The ideal tool would have a GUI that shows an icon of the router, and icons of all devices connected to the router with a bandwidth indicator on the lines connecting the nodes. That's pretty much it.
I'm not sure if my router has SNMP. This might be a dealbreaker since many of the cheaper routers don't. I've also read somewhere that many routers can be monitored over UDP.
Found tnv after quick googling.
tnv (The Network Visualizer or
Time-based Network Visualizer) depicts
network traffic by visualizing packets
and links between local and remote
hosts.
Here is a list of good tools to monitor network activity.
Looks like MRTG was the best tool to use
I have also been pleased with the Serial and USB software provided by HHD Software. I've never used their Network version, but if its as good as the USB and Serial, its probably pretty good. Here is the free trial version.
you can use CACTI and Mikrotik DUDE.

Downloading data to a PIC micro from the web

I have a client that would like a small PIC board that plugs into a PC's USB as a dongle in HID mode. It would basically just transfer small amounts of data over RF to another device across the room.
They would like the data to come from the web. ie. user clicks a link in their browser which wakes up the PIC board and begins a download to the PIC device without the need for another application to visibly popup in front of the user.
I would think this can't be done without the setting up the browser preferences and assigning a custom application to recognize the data file. The security issues with a link initiating this kind of flow of events must be too great unless I'm missing something.
Has anyone done something like what I described above?
You could write a small piece of software that runs in the background on the PC (e.g. a Windows service), and:
Interfaces to the PIC device via USB
Provides a web interface on port 80 or probably some other port, which the browser can then connect to.
If the PIC device is network connected (e.g. has an Ethernet connection, and its own IP address on the network) then the PIC device could provide a web interface to control it. I don't know how feasible it is to fit a small web server onto a PIC though--that would be a tight fit.
Yeah that sequence of events doesn't seem too kosher. Perhaps a browser plugin or a program running on the PC that handles communication between the PIC and web would be better?

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