Find out if ISP is blocking port. *Edited
So I found out my previous ISP was blocking ports.
But I moved and now have different ISP. I searched on Google and couldn't find any definitive info on if they do or don't. What is a simple way to test if my ISP is blocking ports, and which ones they are blocking? Hopefully this question is not too general. EDIT: The simplest way I thought if was to actually install a mail or web server than test it externally. I was hoping for a way I could do it without having to install anything and also find out if other ports are blocked for future reference. |
Run a nmap scan from outside your LAN and grep for "filtered" results? There's on-line nmap services if you don't have access to a remote machine.
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Starting Nmap 6.01 ( http://nmap.org ) at 2013-01-09 14:26 Central Europe Standard Time Code:
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BTW if you only allow --state ESTABLISHED,RELATED ingress there's now way telling where along the route stuff gets filtered.
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Well, I just setup a web server real quick. I figured that if it worked, I was going to keep it anyway. I forgot that Ubuntu makes it insanely easy to do. It does work, I can connect to it through port 80 externally. Neat!
My last ISP blocked inbound port 80 and a few more as well. Having a personal server was against the ToS. I moved and now have a new ISP. I researched and read every document and from what I gathered it's absolutely fine to run a server as long as its not for commercial/enterprise use. They don't seem to block any ports, but I am going to try the mail server now and see if that sending email back and forth. |
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Also, how do I mark a thread as solved? I swear that I used to just go to thread tools. I haven't logged in for a year and some change, was this changed? Oh and as always, thanks. I'll try to give you some more rep if I can if you care for it. |
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I'm just not seeing it. I clicked your link and it said it was marking the thread as solved, but didn't update the thread title with the little [SOLVED] prefix. |
Yeah, forgot. Threads in /General can't be marked [SOLVED].
Kind of makes sense with all those threads about religion, politics and Microsoft Windows :-] |
[deleted] // Huh, couldn't see that it had already been realized that it was /General.
Sorry. [First time I responded before reading further :mad:] |
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