Problem with TCL blocked by firewall!

BitComet BitComet General Discussion
1

Hi all.I have this problem some time and i can’t solve it.Before i changed my ISP everything was Ok,but now i have new modem/ruter and i forwarded ports but still have a yellow light in Bitcomet and this error about TCP.

TCP Connections: Established: 8 [MAX:65] / Half-Open: 12 [MAX:65]
LAN IP: 192.168.0.101
WAN IP:
Listen Port of TCP: 23595 (Blocked by Firewall/Router)
Listen Port of UDP: 23595 (Opened in Firewall/Router)
Windows Firewall: Added [TCP opened, UDP opened, TCP(ED2K) opened, UDP(ED2K) opened]
UPnP NAT port mapping: Added

I’m behing two routers adn i use Bitcomet 1.36 because 1.37 doesn’t work on WinXP SP2 32-bit.First one (main ADLS router) is TP Link TD-W8951ND and second one is TP Link TL-WR941ND.Internet connection is 17Mb ADSL,antivirus is turned off,only firewall from windows is enabled.

Can you tell me why i got only TCP blocked while UDP is open?Thanks in advance.

2

You probably have something in one of the routers that is blocking the incoming connections. We have an article on wiki.bitcomet.com that covers the use of two cascading routers, I suggest you begin there.

It’s very easy to be confused when using multiple routers, when the connection comes from the internet and hits the first router, it needs to be forwarded to the second router, not to your computer, the second router then needs to forward it to your computer. Also be sure to make the rules for both TCP and UDP. Some routers require two rules, one for each and other routers have an option to combine the rule for both protocols.

3

I forwarded ports on 1st and 2nd router,but i think that main problem is my subnet mask.Now i see that 1st one have subnet 255.255.255.255 and 2nd have 255.255.255.0.I don’t know is it possible to change that somehow?

4

Have you read the article on wiki.bitcomet.com about cascading routers?

5

Have you read the article on wiki.bitcomet.com about cascading routers?

No,because i don’t see anything except this start page.

6

It looks like there is a problem with the database, here is a link to an older copy that still works…

http://wiki.bitcomet.com/add_port_mapping_in_nat_router?rev=1347663724

7

I remember it had been solved weeks before. Unluckily it happened again. I’ll have someone look into it. But we’re already on our holidays. Hope he can manage to solve it from home.

8

I’ve read the article about cascading routers and did everything but still got yellow light in Bitcomet.I really don’t know what to do.Can you help me Guradian Eagle?I’ll post pics if i had to just to make this work.

9

First see if you can bypass one or both of the routers, it will help narrow down where your connections are being blocked.

A more accurate way to test if your port is open can be done at: http://canyouseeme.org Bitcomet

10

I solve the problem yesterday.It turns out that first router was giving a wrong IP adress to the WAN port on the second router.Now everything works fine.

Thanks again for your help The UnUsual Suspect.

11

It’s actually not assigning the wrong address, it’s a matter of forwarding the address that it assigns. If you look at it like links in a chain, the connection comes in on port number XXXX from the internet and you need to send all traffic to the wan port on your second device’s IP which we’ll call aaa-aaa-aaa-aaa, then all traffic on aaa-aaa-aaa-aaa:XXXX has to be forwarded to the next device’s WAN port which we’ll call bbb-bbb-bbb-bbb and if your computer is connected to this device you’d need to forward to the computers IP and port number which we’ll call ccc-ccc-ccc-ccc:XXXX.

The connection can pass through many IP addresses but it’s guided by the port number which is how it finds its way to the proper computer, but none of this can work if there aren’t rules in place on each device on how to handle that port.

Glad you got it working.