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SmartSniff is a network monitoring utility that allows you to capture TCP/IP packets that pass through your network adapter, and view the captured data as sequence of conversations between clients and servers. You can view the TCP/IP conversations in Ascii mode (for text-based protocols, like HTTP, SMTP, POP3 and FTP.) or as hex dump.
The ability to switch between different sets of network settings (locations) can be useful in circumstances such as these:. You use the same type of network (such as Ethernet) at work and at home, but the settings you use at work don't allow your Mac to automatically connect to the same type of network at home. Your Mac connects to more than one type of network service (such as both Wi-Fi and Ethernet) at work and at home, but at work you want your Mac to try connecting to the Ethernet network first, and at home you want your Mac to try connecting to the Wi-Fi network first.
In other words, you want to set a different for each location. Your Mac isn't connecting to your network and you want to quickly reset your network settings for testing purposes, without losing your current network settings.In each of these examples, the Location feature of Network preferences can help. Application octet stream files. Choose Apple menu () System Preferences, then click Network.
The Location pop-up menu shows the name of your currently selected set of network settings. The default location is named Automatic. Choose Edit Locations from this menu. Click the Add (+) button below the list of locations, then type a name for the new location, such as Work or Home or Mobile. (To remove a location, use the Remove (–) button below the list.). Click Done. The Location menu should now show the name of your new location. Any changes you now make to your Wi-Fi, Ethernet, or other network settings will be saved to that location when you click Apply.
The network settings in your previous location remain as you left them, so you can use the Location menu to switch back at any time. Click Apply to save your settings and complete the switch from the previous location to the new one. Your Mac then automatically tries to determine the correct settings for each type of network.
If you need to change the settings manually, remember to click Apply again after making your changes. If you're using network locations because you want each location to prefer a different network service (such as Wi-Fi or Ethernet) when connecting, follow these steps to change the service order (also known as port priority) in each location.
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Choose Apple menu System Preferences, then click Network. Use the Location menu to choose the location you want to modify. Click below the list of services, then choose Set Service Order. Drag services within the list to change their order. Your Mac will try to connect to the service at the top of the list first, then continue in descending order until a connection is successful.Virtual private network (VPN) connections can't be reordered, because they always take priority over other connections. Click OK, then click Apply to make the updated service order active. By default, the location named Automatic makes all available network services (also known as ports or network interfaces) active, whether or not they are being used to connect to a network.
Your Mac automatically searches these services for a network or Internet connection. For example, you might use a Wi-Fi network at home but an Ethernet network at work. Your Mac automatically detects which of these network services to use when it connects.If you want to make sure that your Mac doesn't use a particular network service, such as Wi-Fi, you can make that service inactive in any of your network locations:. Choose Apple menu System Preferences, then click Network.
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Use the Location menu to choose the location you want to modify. Click below of the list of services, then choose Make Service Inactive. Click Apply.
The ARP table (AFAIK) only contains the addresses of machines you've connected to and not all the machines on the local network. To get all the machines you'd have to do some sort of broadcast which could be really slow. The ARP table is populated as connections to machines are made. To avoid looking up the information later it is cached in the ARP table. Each network interface has its own ARP table.NET does not expose this information I believe.
You can use P/Invoke to call into Win32 and the GetIpNetTable to retrieve the information however. The GetIpAddrTable will provide you the mapping. Refer to for the P/Invoke signatures for some of the functions.Michael Taylor - 2/3/08. I can certainly show you the code but I question whether it is actually what you want. You're wanting to get the IP/MAC address of machines on the network and the ARP table doesn't give you that. It'll have IP addresses for all machines you've connected to irrelevant of whether they're local or not. If your trying to build the topology of the local network then ARP isn't the way to go.
Instead you'd have to rely on some networking component of Windows. What component that would be I don't know but it'd probably be dependent upon whether you're running a workgroup, NT domain or AD.
It might also be influenced by your goals. For example the Peer-to-Peer infrastructure in.NET v3.5 is the best way to go if you want to have clients on multiple computers talking to each other.Still, here is code to dump the ARP table of an adapter.
There are a few caveats. Firstly the structures can be padded and this code doesn't take that into account.
Secondly it doesn't do any error checking so you're on your own there.
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