# Relay node syncing to core node but when I add other Pool operators nodes to topology it syncs **URL:** \ **Category:** Operate a Stake Pool\ **Created:** [12 August 2020 14:44 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299 "2020-08-12T14:44:33Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Momo1990](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/momo1990/32/16772_2.png) [@Momo1990](https://forum.cardano.org/u/Momo1990)\ **Post date:** [12 August 2020 14:44 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/1 "2020-08-12T14:44:33Z")
![image](https://us1.discourse-cdn.com/flex023/uploads/cardano/original/3X/d/a/daf2c4f4760df4abb95699c384e87cbfa4c32501.jpeg) Relay and block producer nodes not reading each other in peer list ---
**Author:** ![ADAfrog](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/adafrog/32/16303_2.png) [@ADAfrog](https://forum.cardano.org/u/ADAfrog)\ **Post date:** [12 August 2020 17:48 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/2 "2020-08-12T17:48:23Z")
Hello, Could you be a bit more clear? Do your relays sync with just IOG relays in the topology? With the cardano-node on relay running, can you see that the port is open using this tool? If the ports are not open properly, the nodes can typically make outbound connections but not receive inbound connections. Port Checker tool (only to check relays as block producer should be locked down to only talk to your relays): > **[Open Port Check Tool - Test Port Forwarding on Your Router](https://www.yougetsignal.com/tools/open-ports/)** > > Port checker is a utility used to identify your external IP address and detect open ports on your connection. This tool is useful for finding out if your port forwarding is setup correctly or if your server applications are being blocked by a... Follow this as a guide to setup your firewall rules on your relays and block producer: > [@Securing a node on Linux?](https://forum.cardano.org/t/securing-a-node-on-linux/37928/2): > > Majority of operators are running on Ubuntu, using ufw firewall The ufw firewall rules I have offhand are as follows, and can be translated into iptables by referencing the port activity on relay nodes: ufw default deny incoming ufw default allow outgoing ufw limit proto tcp from any to any port [custom ssh port] ufw allow [relay port]/tcp on block producer (bp) node: ufw default deny incoming ufw default allow outgoing ufw limit proto tcp from any to any port [custom ssh port] sudo u… Once this has been completed, you will want to double check your topologies as well as the command to start the nodes, particularly the --host-addr param ---
**Author:** ![Momo1990](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/momo1990/32/16772_2.png) [@Momo1990](https://forum.cardano.org/u/Momo1990)\ **Post date:** [13 August 2020 01:42 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/3 "2020-08-13T01:42:09Z")
Man, you the best. I forgot to open the ports on my server ---
**Author:** ![Momo1990](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/momo1990/32/16772_2.png) [@Momo1990](https://forum.cardano.org/u/Momo1990)\ **Post date:** [13 August 2020 01:46 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/4 "2020-08-13T01:46:26Z")
How do I run the Ubuntu node as a service? ---
**Author:** ![ADAfrog](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/adafrog/32/16303_2.png) [@ADAfrog](https://forum.cardano.org/u/ADAfrog)\ **Post date:** [13 August 2020 02:01 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/5 "2020-08-13T02:01:01Z")
running a systemd service is another animal - if you create another post I will address it there as doing so would be most beneficial to other users ---
**Author:** ![Momo1990](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/momo1990/32/16772_2.png) [@Momo1990](https://forum.cardano.org/u/Momo1990)\ **Post date:** [13 August 2020 18:41 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/6 "2020-08-13T18:41:08Z")
Thank you so much. Here’s a link to the topic [How do I run the Ubuntu node as a service?](https://forum.cardano.org/t/how-do-i-run-the-ubuntu-node-as-a-service/38413) ---
**Author:** ![ADAfrog](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/adafrog/32/16303_2.png) [@ADAfrog](https://forum.cardano.org/u/ADAfrog)\ **Post date:** [13 August 2020 19:30 UTC](https://forum.cardano.org/t/relay-node-syncing-to-core-node-but-when-i-add-other-pool-operators-nodes-to-topology-it-syncs/38299/7 "2020-08-13T19:30:43Z")
ok I have you covered - post updated on systemd setup