- 5 Kwiecień 2008
- 10 437
- 2 641
- 405
- Odznaki
- 205
- QNAP
- TS-x77
- Ethernet
- 1 GbE
Poz.
6
Symptoms
Cause
Peers connect to rtorrent through one BitTorrent port over TCP and UDP, and to DHT through one UDP port. If the port is closed, rtorrent still connects to peers itself, but fewer peers can connect to you. A closed port prevents connections to peers that cannot accept incoming connections themselves. By default, Rtorrent 16 asks the router over UPnP and PCP / NAT-PMP to map the BitTorrent port (TCP and UDP) and the DHT port (UDP). It makes these requests at every start and after you save a port setting. If the router accepts them, you do not have to forward anything by hand.
Resolution
Notice & Advise
Ref. links:
Rtorrent 16 guide: Ports
- Network & NAT shows IPv4 TCP port … not reachable.
- You are not sure whether you have to forward the port on your router yourself.
Cause
Peers connect to rtorrent through one BitTorrent port over TCP and UDP, and to DHT through one UDP port. If the port is closed, rtorrent still connects to peers itself, but fewer peers can connect to you. A closed port prevents connections to peers that cannot accept incoming connections themselves. By default, Rtorrent 16 asks the router over UPnP and PCP / NAT-PMP to map the BitTorrent port (TCP and UDP) and the DHT port (UDP). It makes these requests at every start and after you save a port setting. If the router accepts them, you do not have to forward anything by hand.
Resolution
- Check the port. Open Network & NAT and press Check TCP port. If the BitTorrent port card reads IPv4 TCP port … open, you do not need to do anything.
- Check what the router mapped. In the Network services card on the same page, Mapped as shows what the router granted, and By shows which method was used. Not mapped means that the router mapped nothing for that port.
- Check the switches. In Settings → Port forwarding & VPN, under Router port mappings, UPnP and PCP / NAT-PMP should both be on. UPnP or PCP / NAT-PMP must also be on in the router itself. While a port is not mapped, Rtorrent 16 asks the router again every five minutes.
- If the router does not map the ports, forward them manually: the BitTorrent port over TCP and UDP, and the DHT port over UDP, to the NAS's LAN address. The numbers are in the Port column of Network services. Then press Check TCP port again.
Notice & Advise
- A port forwarded manually works while the switches are on, but it does not appear under Mapped as.
- If Route to the internet shows Possible multiple routers or Another NAT likely before your router (IPv4), a forward on your own router alone may not open the port. The card lists what to do.
Ref. links:
Rtorrent 16 guide: Ports