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Port fowarding w/ linksys router
- Thread starter nsutt22
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epochblue
macrumors 68000
Something listening?
Do you have something listening on that port on your tower? It's no different from a telephone...you can call a number all day long, but if there's no one at the other end to pick it up, you're SOL. So, stepping back a step, what's listening for requests on port 8082?
nsutt22 said:
Do you have something listening on that port on your tower? It's no different from a telephone...you can call a number all day long, but if there's no one at the other end to pick it up, you're SOL. So, stepping back a step, what's listening for requests on port 8082?
jsw
Moderator emeritus
First of all, is the G4 set up to always be at 192.168.1.103? Manual IP or "DHCP with manual IP" are required there (System Preferences...->Network), else it might not always be at that address.
Also, web sharing is usually at port 80 (is yours set up for something else?), FTP is at 21, VNC (remote desktop) is at 5900 (and 5901, 5902, etc. if you use multiple displays) - these are the default ports; you might use different ones. Also, beware of FTP unless you know what you're doing - it's pretty easy to hack into. SCP, SFTP, etc. are better options.
You need to be sure these ports aren't stopped by the Mac's firewall (System Prefs...->Sharing->Firewall) as well.
Also, web sharing is usually at port 80 (is yours set up for something else?), FTP is at 21, VNC (remote desktop) is at 5900 (and 5901, 5902, etc. if you use multiple displays) - these are the default ports; you might use different ones. Also, beware of FTP unless you know what you're doing - it's pretty easy to hack into. SCP, SFTP, etc. are better options.
You need to be sure these ports aren't stopped by the Mac's firewall (System Prefs...->Sharing->Firewall) as well.
superbovine
macrumors 68030
supertechincal ftp is 20/21 TCP with 20 being console and 21 being data. however, 21 should work just fine. however, if you run it problems might try adding 20/tcp as well.
if you are stilling having a lot of problem first thing to do is make sure the mac is in working order.
To do that is set that computer to be DMZ host on the router and that forwards everything there. If you cannt get it workign that way then somethign else is wrong because that removes the router from the equestion in finding the problem.
Then from there for for port forwarding.
Also make sure the IP is corect since linksy does not allow you to give a static IP to a computer so it will always have that ip when it connects (somethign I wish they would add)
To do that is set that computer to be DMZ host on the router and that forwards everything there. If you cannt get it workign that way then somethign else is wrong because that removes the router from the equestion in finding the problem.
Then from there for for port forwarding.
Also make sure the IP is corect since linksy does not allow you to give a static IP to a computer so it will always have that ip when it connects (somethign I wish they would add)
You could always just set up DMZ on the router for that IP address. Of course that's akin to connecting your computer directly to the internet and opens up all your ports to attacks.
epochblue
macrumors 68000
Static IP?
I was under the impression (perhaps wrongly so) that the IP of the router, as the outside worlds sees it, is always the same as the cable/DSL modem's? I would also assume that most non-business cable/DSL internet plans these days come with DHCP'd IP addresses. What can you do with the firmware of the router to guarantee that your IP always stays the same? Internally, of course, you set the IP, so it's always the same. It's also possible I'm mis-reading the above replies....and if that's the case, ignore that whole last paragraph. 😱
Assuming I'm correct so far (a potentially big assumption), the only way to ensure your IP never changes is to request a static IP from your ISP (could cost money), or use a DynDNS account instead. Of the two, I'd go with the DynDNS account because it's free and will ultimately be easier to remember in (words not numbers). You'll need one or the other to keep you from having to check your IP (automatically or otherwise) everyday to make sure you're the address you're typing in is still your box...
Link to DynDNS: http://www.dyndns.com/
On a side note, I'd highly recommend AGAINST putting your computer in the DMZ unless it's the only option you have left. Putting a computer that may not be properly secured or have all the up-to-date security patches on relatively out-dated binaries is just asking for trouble...
I was under the impression (perhaps wrongly so) that the IP of the router, as the outside worlds sees it, is always the same as the cable/DSL modem's? I would also assume that most non-business cable/DSL internet plans these days come with DHCP'd IP addresses. What can you do with the firmware of the router to guarantee that your IP always stays the same? Internally, of course, you set the IP, so it's always the same. It's also possible I'm mis-reading the above replies....and if that's the case, ignore that whole last paragraph. 😱
Assuming I'm correct so far (a potentially big assumption), the only way to ensure your IP never changes is to request a static IP from your ISP (could cost money), or use a DynDNS account instead. Of the two, I'd go with the DynDNS account because it's free and will ultimately be easier to remember in (words not numbers). You'll need one or the other to keep you from having to check your IP (automatically or otherwise) everyday to make sure you're the address you're typing in is still your box...
Link to DynDNS: http://www.dyndns.com/
On a side note, I'd highly recommend AGAINST putting your computer in the DMZ unless it's the only option you have left. Putting a computer that may not be properly secured or have all the up-to-date security patches on relatively out-dated binaries is just asking for trouble...
jsw
Moderator emeritus
Your router accepts traffic on many inbound ports at a given IP address. It's like the IP address is an apartment complex's address, and the port is an individual apartment number.regre7 said:
Anyway, port forwarding involves taking inbound packets assigned to a certain port (like 80 for web traffic) and sending them to a particular computer attached to that router. Ports which are not forwarded are effectively ignored because, in most cases, the router itself won't deal with them.
So I could access, for instance, file and printer sharing on my Windows machine at home if I'm sipping coffee at my local Starbucks?