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7

…and the previous IT personnel did not leave any information. I feel your pain on this. Inheriting someone else’s unmapped and undocumented network mess is not pleasant. As explained in this answer you could use nmap like this; of course 192.168.0.1/24 is an example and should be changed to the network range assigned to the system by the ISP: nmap -sP ...


3

IP needed to be easily implemented on a wide variety of hardware. CPUs of the day didn't have CRC32 hardware built in. No one was expecting to create custom hardware for IP compatibility; IP was expected to be handled in software. So they had to select something that could be easily implemented in software on systems that were already in the field in 1981 ...


2

The computer name can be a bit tricky depending on the OS in use. If it's a fully qualified domain name, as in, proper DNS record exists for it, you can just do a reverse lookup: nslookup 192.168.0.123 where you of course use the correct IP address. If it's that windows network name thingy (of which I do not know the proper protocol name. SMB?), then I've ...


2

In addition to using nmap and other active scanning tools you should also look at your mac address tables on your firealls, routers, and switches. These devices will keep a list of the MAC addresses and IP addresses of all devices that have communicated with in a defined time period. Often this time period can be increased for more detailed results.


2

No. your global Ip will keep on changing until you will ask/buy a static ip for your connection. Dont know about your area, but that is very easily possible by paying very nominal amount.


2

There's no way to prevent a computer from using a different IP address. You can however, assign a specific IP address to a computer via DHCP based on the MAC address so when that computer requests an IP from the DHCP server they get that same one every time. I will give you some possibilities below, but keep in mind that it would not prevent someone from ...


1

With the appropriate hardware, this is quite easy to do. A managed switch will allow you to assign one or more IPs to a (physical) port, and will block traffic coming from any other IP on that port. You can also use a different network interface per computer on your server, though that may prove quickly more costly. Lacking such hardware, the best you can ...


1

Short answer, you cannot change the ip of the VPN interface, as it is being given to you by the oposite site. Given that 10.x is a class A network, you usually don't have a Class A network on both sides, which makes me wonder how you ended up with a class A network you're currently in. Either ask the opposite side to change their network, or change yours.


1

On Windows you can use ipconfig /all to find the DUID & IAID: Ethernet adapter VirtualBox Host-Only Network: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : VirtualBox Host-Only Ethernet Adapter Physical Address. . . . . . . . . : XX-XX-XX-XX-XX-XX DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . ...


1

Classful addressing is dead. Classes are superseded by the subnet mask. If it lets you specify a subnet mask, it's not classful.


1

Yes. Since years ago home routers allows classless addressing. Whenever you see that the router configuration interface has a field to put the subnet mask, it means that the router supports it.


1

First make your servers ip static if not already. Then from routers control page make it route incoming traffic to your servers ip(DMZ). You need to register name server to your domain ex. Afraid dns. Then link it to your ip.


1

Alright I managed to do it. I added an iptable rule on my linux server: iptables -t nat -A OUTPUT -d [external ip] -p all -j DNAT --to-destination [server local ip]


1

OK, so it seems like using sudo ifconfig en0 down is not the best way to do it. Best way is to turn off airport first sudo networksetup -setairportpower airport off then change the IP address to manual: sudo networksetup -setmanual "Wi-Fi" 192.168.1.98 255.255.255.0 192.168.1.254 the device will still be turned off here so turn it back on and it should ...


1

The receiving host knows that there are lost fragments and waits until a reassembly timeout expires. Unless the lost fragments arrive, the fragments are dropped. RFC 791 in section 3.2 defines that : If the timer runs out, the all reassembly resources for this buffer identifier are released. The initial setting of the timer is a lower bound on the ...


1

This works nicely, I use it mostly with psexec when inspecting client computer connections. nslookup myip.opendns.com resolver1.opendns.com


1

I successfully created adhoc network of three devices with following commands. One device is android phone and other two are laptops. on machine 1 (Android): ifconfig wlan0 down iw wlan0 set type ibss ifconfig wlan0 10.0.0.11 up iw wlan0 ibss join MY-SSID 2412 iw wlan0 info iw wlan0 link on machine 2 (Linux): ifconfig wlan0 down iw wlan0 set type ibss ...



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