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I'm working on a project for my company. I'm using a DSL connection. My IP address changes every time I restart my router. Is there a faster way to request a new IP from my ISP programatically? I've seen that RDSL services can change the IP in a few seconds, but I'm looking for a more "legal" way to do this other than RDSL.
Thank you!
Does your router have firmware you can browse to? There may be a link to reboot your router (or even release/renew your IP lease) there. You can set up a cron job to call cURL to access that URL every so often. You might also have to authenticate in order to do that, but cURL should handle that.
If you're on a system that does not have cURL or cron, you may have equivalents, but they're pretty simple programs and you should be able to find them for any popular OS.
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I'm having trouble with my network at work.
We have a LOT of computers on our network and one of them is causing me problems.
I'm rendering from 3ds Max via Backburner and I can see that there is a another manager distributing jobs.
I can see the IP adress of the computer (198.162.1.61), I just don't know where it is or what it's called.
Is there any way to get a specefic computers information if I only know its IP address?
Consult the ARP table. Then you'll get the MAC address, this you can match with the vendor via:
http://www.adminsub.net/mac-address-finder
command:
arp -a
use the following command to see the name of the computer:
nbtstat –a <ipaddress>
if you are lucky, you can also gather information via scans (ex program: autoscan, nmap, ...)
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I have got telnet server running on a bsd target. I want to connect to this target from multiple other machines. Surprisingly it does not allow more connections.
I checked why and found it is not listening(listen) in a loop. So, I kinda fixed it. But I was wondering is there any specific reason why telnetd code is kept with single connection at a time? (I am allowed to connect to telnetd server from only one client for a particular port.)
(I know telnet is not a safe option. But I am having just fun on small embedded platform and getting things working is more imp than security at this moment.)
Thanks
Telnet is supposed to be launched by inetd. You need to configure inetd to do the listening for you.
The wikipedia article that I linked to explains how to do that.
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Let's say somebody invented a new protocol I would put on top of IP. Would two computers from the other ends of the world be able to communicate with it, i.e. would routers forward the frames that aren't standard TCP/UDP/ICMP?
Yes, if it is build on top of IP then it would be routable over the internet. The IP protocol defines the header and payload. The header is used for routing. So you would be able to send custom IP-based protocol data from one computer to another over the internet.
However, both computers will need custom drivers to send, receive and understand the data.
I'm not sure why you'd bother though. If you're sending custom data, you're much better off writing an application level protocol on top of tcp or udp and take advantage of the networking layer built into all computers and operating systems already. It'll be easier to write, maintain, and debug.
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I have a college lan connection with static ip address and a Home internet connection(wired) with dynamic DHCP working. I need to frequently change the tcp/ip v4 settings in the properties of local area connection.
Is there a way I can have 2 network profiles for wired connections- one for college and one for home so that i can simply select which one to use.
Actually I want to be able to use this functionality to ultimately write a batch file that automatically detects my proxy settings and sets the system proxy settings, so that the browser settings also don't have to be changed everytime I switch the profiles. I was able to do it in ubuntu using a bash script. I want to do the same in windows.
Have you looked at the Alternate IP Address Configuration that is available in Windows
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Say i'm communicating with a computer A in a remote network .
Is it possible to know what are the hops that he is going through?
In other word, is it possible to detect what is computer A route to my computer?
I know that A might have a various routes to my computer , it just want to find a route. My whole problem begins with that fact that some networks "hides" there inside computer ( like NAT ) and just give you the gateway ip.
(I'm not talking about my route to his computer that can be easly achived by traceroute)
thanks!
The IP option Record Route asks routers along the way to include their address in the datagram so the route can be tracked. The trick is, many routers and firewalls are not keen on giving out this information and DROP packets with this option set. And, you'd have to get the remote peer to set the flag, so it would only be useful if you're in control of the software on the remote peer too.