Possible firewall problem with ubuntu server and bitcoind

achow101

staff

Activity: 3458

Merit: 6793

Just writing some code

Quote from: Fr0stst0rm on September 20, 2016, 12:55:21 PM

How do i open the port for outgoing connections?

I'm not quite sure as I am not particularly familiar with iptables. I do know that it's something like

Code:

iptables -A OUTPUT ....

where the .... is stuff that I don't know. Try google, it's very helpful.

Fr0stst0rm

newbie

Activity: 3

Merit: 0

You are right the port is not open for outgoing connections.

I use a qemu hook to do the port forwarding.

Here is the important part of the qemu hook:

iptables -t nat -I PREROUTING -p tcp --dport 8333 -j DNAT --to $Guest5_ip:8333
iptables -I FORWARD -d $Guest5_ip/32 -p tcp -m state --state NEW -m tcp \
--dport 8333 -j ACCEPT

How do i open the port for outgoing connections?

achow101

staff

Activity: 3458

Merit: 6793

Just writing some code

You need to allow both incoming and outgoing connections to and from port 8333

Fr0stst0rm

newbie

Activity: 3

Merit: 0

Hello. I have an ubuntu server on which several VMs are running and I want to use one VM as Bitcoin Node. I installed everything according to the tutorial on bitcoin.org and bitcoind is running, but it is not syncing the blockchain. Users on reddit suggested, that there might be a problem with the firewall.

Which other ports except port 8333 do i need to forward to the VM?
Or is there another problem with my installation?

Output of bitcoin-cli getinfo:

"version": 130000,
"protocolversion": 70014,
"walletversion": 130000,
"balance": 0.00000000,
"blocks": 0,
"timeoffset": 0,
"connections": 1,
"proxy": "",
"difficulty": 1,
"testnet": false,
"keypoololdest": 1474373107,
"keypoolsize": 100,
"paytxfee": 0.00000000,
"relayfee": 0.00001000,
"errors": ""

Topic: Possible firewall problem with ubuntu server and bitcoind (Read 513 times)