Tech Support Guy banner

port number

3956 Views 37 Replies 7 Participants Last post by  jmwills
Does anyone know what is a Mac address?
Also what is a port number and do I need the port number?
Not open for further replies.
21 - 38 of 38 Posts
Actually, many devices allow you to change the MAC address, almost any broadband modem, for instance. You can also change the MAC address for many NIC's as well. Finally, you can spoof any MAC address, even if the hardware doesn't allow a change.
zergpc208 said:
Okay I took a screenshot of this.

In theese pics in the winipcfg one the MAC address is the adapter address and in the dosbox its the one listed physical address. If these dont show up in either place the there sohould be a sticker on the device or if all else fails you can use a MAC address spoofing program which should tell you what the MAC address is currently and let you change it, searching google is probably the best place to find MAC address spoofing software be careful where you get it from though run a virus scan on the file.
So if it does not come up or I have to change it I should search google for a MAC address spoofing program ?
Other than trying to get around some security issues, why would you need to change the MAC address. Hopefully the forum isn't going to continue to help much with suggestions if spoofing a MAC address is the reason.
Thats why I was trying to skirt around the MAC address spoofing thing in my earlier post b/c the only times i've ever seen it done was to bypass some sort of security but I'm sure there is some other practical use for it.
if the mac address doesn't show the device is probably not connected to the computer, not powered on, doesn't have the proper drivers installed or it may be faulty. You should never have to add or change a MAC address to either one of those places listed in the previous posts unless you're getting into something very complicated.
I would strongly suggest NOT getting a MAC address spoofing program b/c you will probably never need to use it but if you really need one just be cautious where you get it from.
There's nothing wrong with spoofing a MAC address there are legitimate reasons to do it. Mostly having to do with privacy or security, even just to see if it's possible.
zergpc208 hasn't asked for anything illegal he/she appears to be just curious. You'll note that JohnWill, the moderator, mentions MAC address spoofing (rightly so) so, I'm pretty sure you haven't done anything wrong ITpro4470 so don't worry about it. Be sure to read the forum rules and be sure to ask a moderator before you get defensive.

I had already been warned once about suggesting possibly illegal activities and was just trying to shy away of that. In the future I will run my post by a moderator if I am worried about it.
Probably a good idea. Moderators are typically given a bit more leeway than us mere mortals ;-)
I did not know at first I thought windows would allow you to change it.But many forms talk about problems with the MAC address and ports being block so I don't know what I need to learn or not.

Other forms talk about problems with the winsock again I don't know what I need to learn or not .
Is there a particular problem you are working on? Most times folks don't need to worry about spoofing MAC addresses.
Bob Cerelli said:
Probably a good idea. Moderators are typically given a bit more leeway than us mere mortals ;-)
Yep, life's tough out there in the trenches, isn't it. :rolleyes:
if you're just setting up home networkthen all you really need to know is how to install the NIC drivers on your home compuers and how to change certian settings on your router, all of which should be listed in the documentation that comes with the router.
When setting up WEP the router usually generates several WEP keys you select the one you want to use then the next time each computer tries to connect wirelessly you put in the WEP key there. Basically its a lock on the router and you have to give each wireless client a key to access. This should be enough security for a home network.
Some times my Zone-Alarm is blocking ports why is that and what is going on ?

Looking at the Windows longs I should see all my ports add see how to set it up?
So to be clear we are moving on from spoofing mac addresses to blocked ports.

Most times, programs like ZoneAlarm block ports are for your own protection
The prots were setup whenyouinstalled Windows. Now if you woould quite beating around the bush and ask the $64k question maybe we can end this thread.
ZA blocks ports activity that it thinks is suspicious. 80, 8080, 25, 110, 21, 23 are the basic ones you use on a daiy basis (maybe not 21) but the firewall programs see activity and if a rule has not been deinfed ti allow that activity (i.e., traffic thru a port) you will get a notice asking to allow or deny.
Let me give this a try. It'll be a little simplistic but I'll try to keep confusing language out of the description for clarity purposes.
Ports are a result of networking because they're only relevant if you have two or more computers. What really helps in understanding is the question "when I connect to a computer with a web server using Internet Explorer how does the web server know that I want a web page rather than an ftp directory or to connect to a game that might exist on that computer?" The answer is ports. When a computer wants to connect to a web server and retrieve a web page it connects to the destination computer on port 80 so that the destination computer knows that the external request is for a web page. If the destination computer had received a request on port 21 then the it would know that the request is for ftp software, a request on port 25 is the SMTP (email protocol). So just to be clear ports are how one computer knows what the other computer is asking for. An example is a building with doors numbered from 1 to 65534. Everyone knows what's supposed to be inside the first 1024 (0 - 1023) doors whether there is something there or not and the others above 1023 may or may not have something in them depending on what the owner of this building decides to do. Now, when a room has something in it you can tell because when you knock on it you get a reply unlike the empty rooms where there is no reply (knocking in this analogy is port scanning not port knocking). If someone wants to take something from those rooms they'll knock on the doors to see if they get a reply and if they do get a reply and it's something they want then they'll pick the lock, open the door, and try to get what they can out of the room. Now, if we back away from the analogy for a second we can discuss what a firewall does in this context. Firewalls work in different ways depending on the implementation but the general trend is towards a product that hides the entire building. Someone will go to the address and look around but can't see the building with the doors so they eventually move on leaving the address alone, at least that's the way it's supposed to happen. Now, when you forward a port it's the equivalent of making the door visible but only to somebody who knocks on it. This is important because the more doors people have access to the more ways they have to try getting into your building (FYI the building is your network or computer) and once they're in they have greater access to your resources. A firewall ensures that they only have access to the parts of the building you want them to have access to and only when you want them to have it.

See less See more
So zergpc208's,

Simple enough and did it answer you question about Zone Alarm and blocking ports?
Care to guess what is behnind "Door 666"?
21 - 38 of 38 Posts
Not open for further replies.