https://www.multichain.com/qa/tag/figrewall Powered by Question2Answer https://www.multichain.com/qa/9700/couldnt-connect-to-seed-node-firewall-problem i followed this<br /> <br /> <a href="https://blog.cotten.io/deploying-a-blockchain-with-multichain-on-amazon-ec2-b288ae118b30" rel="nofollow">https://blog.cotten.io/deploying-a-blockchain-with-multichain-on-amazon-ec2-b288ae118b30</a><br /> <br /> &amp; then<br /> <br /> <a href="https://www.multichain.com/getting-started/" rel="nofollow">https://www.multichain.com/getting-started/</a><br /> <br /> &nbsp;<br /> <br /> &nbsp;<br /> <br /> &nbsp;<br /> <br /> [ec2-user@ip-172-31-18-195 ~]$ nano ~/.multichain/alertchain-core/params.dat<br /> [ec2-user@ip-172-31-18-195 ~]$ multichaind chain1@172.31.31.111:4287<br /> <br /> MultiChain 1.0.4 Daemon (latest protocol 10010)<br /> <br /> Retrieving blockchain parameters from the seed node 172.31.31.111:4287 ...<br /> Error: Couldn't connect to the seed node 172.31.31.111 on port 4287 - please check multichaind is running at that address and that your firewall settings allow incoming connections. https://www.multichain.com/qa/9700/couldnt-connect-to-seed-node-firewall-problem Fri, 18 May 2018 07:46:25 +0000 https://www.multichain.com/qa/3378/unable-to-connect-seed-node-digital-ocean-firewall-problem I started with one digital ocean droplet with a multichain chain as per the tutorial. I was then unable to connect to it from the linux box in my house, receiving an error on my command. This shown with debug parameters.<br /> <br /> multichaind chain1@107.170.205.233:7203 -debug=mchn -debug=mchnminor -debug=net<br /> <br /> &nbsp;<br /> <br /> MultiChain Core Daemon build 1.0 alpha 26 protocol 10006<br /> <br /> &nbsp;<br /> <br /> Retrieving blockchain parameters from the seed node 107.170.205.233:7203 ...<br /> <br /> &nbsp;<br /> <br /> Error: Couldn't connect to the seed node 107.170.205.233 on port 7203 - please check multichaind is running at that address and that your firewall settings allow incoming connections.<br /> <br /> ***<br /> I messed with this for an hour. No dice. NEXT: I decided that maybe it would be easier to remove variables. I set up a second droplet on digital ocean (both in SF1 data center), and set up private networking. I tried to connect the second node to the first...<br /> <br /> multichaind chain2@10.134.41.194:2745<br /> <br /> &nbsp;<br /> <br /> MultiChain Core Daemon build 1.0 alpha 26 protocol 10006<br /> <br /> &nbsp;<br /> <br /> Retrieving blockchain parameters from the seed node 10.134.41.194:2745 ...<br /> <br /> Error: Couldn't connect to the seed node 10.134.41.194 on port 2745 - please check multichaind is running at that address and that your firewall settings allow incoming connections.<br /> <br /> Any advice is appreciated.<br /> <br /> ********* UPDATE: <br /> <br /> I downgraded to alpha 25, and the problem went away. https://www.multichain.com/qa/3378/unable-to-connect-seed-node-digital-ocean-firewall-problem Fri, 16 Dec 2016 01:34:40 +0000