Hi, same here, I've used uTorrent for years, and all of a sudden a week or so ago (maybe more?) none of my torrents would download, no matter how popular they are. All I get is a yellow status with "No incoming connections". Very occasionally it will turn green, or have up/download speeds of
bittorrent incoming tcp port no incoming connections
DOWNLOAD: https://shurll.com/2vEsYK
But then I had a hunch... I turned ON the firewall, clicked the advanced button, made sure its as set to ACCEPT all incoming connections, then as each app (uTorrent etc.) launched they asked me if I wanted to allow them through the firewall. I said yes and... voila, I now have perfect tormenting again without a second computer running!
Well I spoke too soon. Today I've lost the connection again on this machine. Just grey, and Unavailable.This time around, launching uT on my other machine has no apparent effect. Qui & relaunch uT on the "problem" machine, and it's red, no incoming connections.
If firewalls block all incoming connections by default how do p2p technologies work? Like torrents, how do you connect to everyone who shares a file and get the information from them? Does it go through a relay server or something?
Both sides attempt to connect to each other simultaneously - in case one side can't accept incoming connections, but is allowed to make outbound connections. Such is the case for the firewall scenario.
If a firewall (as opposed to a NAT) intends to block incoming connections (which I believe they normally do), there's nothing you can do about it. You can try all the hole punching you like. This is achieved by just implementing a symmetric NAT, i.e. each pin-hole is open specifically for a ip,port-quadruple (source, destination port and IP).
BitTorrent is not likely to stop working just because you can't receive incoming connections, it will just be performing slightly worse. Chances are that there are at least some people on the swarm that can receive connections, and you just connect to them.
You can think of google's servers similar to one node in the p2p network. Google were able to 'reach' you from their servers even though your router doesn't accept incoming connection. It's because they didn't initiate the connection (they don't know your ip:NATedport combination to initiate a connection). But your machine can make outbound connections and send/publish your ip:NATedport combo to outside world.
LetF = # firewalled nodes,O = # nodes with open incoming port,T = F + O = total # of nodes,P = O / T = fraction of total nodes that have open ports,Cf = max # connections each firewalled node can have, andCo = max # connections each open node can have.
# Allow net zone traffic on the external interface to be destination NATed (DNAT)# to your computer's internal IP address (for example, 192.168.1.X)# Allow BitTorrent traffic through - port 6969 is if you run a tracker# And ports 6881 through 6889 are for incoming BitTorrent connections.DNAT net loc:192.168.1.X tcp 6969DNAT net loc:192.168.1.X tcp 6881:6889
So what happens is, those trackers reject connections from bittorrent clients who are listening on any of the ports within those ranges, and some of those trackers may blacklist those IPs for 48 hours. So the torrents will show red health smileys, and even if you change your listening port, you are unable to connect because of the 48 hour ban. This kind of ban will often be reported under the "Tracker Status" of a torrent in its Details screen, with the blacklisted information.
The same goes for ISPs, who recognize the port 6881 to be used mostly for bittorrent traffic, and it might be the first port to be blocked if the ISP starts to block/throttle/shape bittorrent traffic. If you mostly receive blue health smileys, you might suspect that to be the reason.
Yes, p2p is allowed, as well as any other protocol. Currently p2p is a set of the most efficient protocols to share and access information on the Internet. We do not discriminate against any protocol.To obtain the best performance with a BitTorrent client or an eMule client, log your account in our web site and proceed to remotely forward a port from the menu "Client Area"->"Forwarded ports". Pick a port or let the system choose an available one for you. Pick "TCP & UDP". Remember the port number.Then, configure the "Port used for incoming connections" (also called "Listening port") in your BitTorrent client so that it matches the port number you have just forwarded remotely. On eMule, go to "Options"->"Connection" tab. Write in both fields of "Client ports" the number of the port that you have forwarded. Disable UPnP, NAT-PMP and any possible automatic port mapping feature that can modify the listening port.
If you run uTorrent or any other software with bandwidth management, make sure to disable such management (such as uTP in uTorrent).In this way your clients will be able to accept incoming connections from the Internet, enhancing performance in several cases and making initial seeding possible. This procedure can be performed just once and for all, as long as you don't wish to change port(s) on your clients. On BitTorrent clients, make sure to disable the option to pick random ports at every startup.If you forward a port for a p2p torrent client, do NOT remap it to a different local port and make sure that the torrent client port matches the remotely forwarded port number, otherwise your client will communicate to trackers (if you use them) and DHT the wrong port: torrent clients will communicate to trackers and DHT the port number you have configured in them. As a result, you will get no incoming packets from the swarm and the torrent client network status token will remain yellow.IMPORTANT: do NOT forward on your router the same ports you use on your Bittorrent or eMule client (or any other listening service) while connected to the VPN. Doing so exposes your system to correlation attacks and potentially causes uncencrypted packets to be sent outside the tunnel from your client.
If you feel your communication with other torrent peers is limited, slow, or is simply never possible, your Deluge ports might be being blocked by a networking device. When the gateway, router, firewall, or proxy receives an incoming connection from an external remote client (a torrent peer), the device will not know where to forward it within your Local Area Network (LAN), so it discards it.
So I will undo that and follow the guide for settings. Especially since I have exactly some of the errorslisted under trouble shooting. LIKE no incoming connections. Very frustrateing when you have no clue.So yes very helpful and thank you for your time and effort to post this for all us newbies.
BitTorrent is a protocol designed for transferring files. It is peer-to-peer in nature, as users connect to each other directly to send and receive portions of the file. However, there is a central server (called a tracker) which coordinates the action of all such peers. The tracker only manages connections, it does not have any knowledge of the contents of the files being distributed, and therefore a large number of users can be supported with relatively limited tracker bandwidth.
This class makes it possible to accept incoming TCP connections. You can specify the port or have QTcpServer pick one automatically. You can listen on a specific address or on all the machine's addresses.
Call listen() to have the server listen for incoming connections. The newConnection() signal is then emitted each time a client connects to the server. When the client connection has been added to the pending connection queue using the addPendingConnection() function, the pendingConnectionAvailable() signal is emitted.
Note: Don't forget to call this member from reimplemented incomingConnection() if you do not want to break the Pending Connections mechanism. This function emits the pendingConnectionAvailable() signal after the socket has been added.
Note: If you want to handle an incoming connection as a new QTcpSocket object in another thread you have to pass the socketDescriptor to the other thread and create the QTcpSocket object there and use its setSocketDescriptor() method.
Tells the server to listen for incoming connections on address address and port port. If port is 0, a port is chosen automatically. If address is QHostAddress::Any, the server will listen on all network interfaces.
Sets the maximum number of pending accepted connections to numConnections. QTcpServer will accept no more than numConnections incoming connections before nextPendingConnection() is called. By default, the limit is 30 pending connections.
Waits for at most msec milliseconds or until an incoming connection is available. Returns true if a connection is available; otherwise returns false. If the operation timed out and timedOut is not nullptr, *timedOut will be set to true.
Generally speaking, participation in a P2P network requires that your host is reachable on one or more TCP or UDP ports by other peers. If your host is directly connected to the Internet (it has a public IP address), you must check that no firewalls are blocking incoming traffic. The firewall can be on the router connecting to the Internet or can be on the host itself. The latter is the case of a Linux box running MLdonkey and with netfilter (iptables) enabled.
If your host is behind a router doing NAT (the host has a private IP address), you must ensure that traffic arriving to the incoming ports of the router will be forwarded to the host running the P2P program. This is where the IPTABLES script further down the page comes into action.
If you want MLDonkey to participate only to some P2P networks, you can open only the relevant ports. I focus the discussion about incoming traffic, where firewalls generally block packets. I assume that there are no restrictions on outgoing connections and that the firewall eventually performs connection tracking, allowing incoming traffic related to outgoing connections. 2ff7e9595c
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