# Problem setting up a relay node in testnet

**URL:** <https://forum.cardano.org/t/problem-setting-up-a-relay-node-in-testnet/64227>\
**Category:** Misc Dev Talk\
**Tags:** cardano, stake-pools, testnet\
**Created:** [6 June 2021 23:40 UTC](https://forum.cardano.org/t/problem-setting-up-a-relay-node-in-testnet/64227 "2021-06-06T23:40:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Alicia](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/alicia/32/37748_2.png) [@Alicia](https://forum.cardano.org/u/Alicia)\
**Post date:** [6 June 2021 23:40 UTC](https://forum.cardano.org/t/problem-setting-up-a-relay-node-in-testnet/64227/1 "2021-06-06T23:40:23Z")

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Hello! I am trying to set-up my relay node in the testnet. I am following this guide [https://cardano-foundation.gitbook.io](https://cardano-foundation.gitbook.io)

but when i run de node i get the following error in my terminal:

[ns504988:cardano.node.DnsSubscription:Warning:61] [2021-06-06 23:17:25.96 UTC] Domain: “[relays-new.cardano-testnet.iohkdev.io](http://relays-new.cardano-testnet.iohkdev.io)” Failed to start all required subscriptions

I think everything its fine in my configuration since everything was working well yesterday, but i restarted for installing my firewall ( I opened the port 3001) and today i get this error, also i tried turning off the firewall but that did not help.

I don’t know if is a way to get the IPs and put them in my topology file i have seen that worked for some people before, Is there any other site were i get this IPs needed for my relay start working?

My topology file:

```auto
{
  "Producers": [
    { 
      "addr": "relays-new.cardano-testnet.iohkdev.io",
      "port": 3001,
      "valency": 2
    }
  ]
}

```

Thank you so much!

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<div class="post-metadata">

**Author:** ![Alexd1985](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/alexd1985/32/23759_2.png) [@Alexd1985](https://forum.cardano.org/u/Alexd1985)\
**Post date:** [6 June 2021 23:42 UTC](https://forum.cardano.org/t/problem-setting-up-a-relay-node-in-testnet/64227/2 "2021-06-06T23:42:54Z")

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Use host-addr 0.0.0.0 when u start the node, and be sure that the fw allow OUT connections for port 3001

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<div class="post-metadata">

**Author:** ![Alicia](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/alicia/32/37748_2.png) [@Alicia](https://forum.cardano.org/u/Alicia)\
**Post date:** [7 June 2021 00:53 UTC](https://forum.cardano.org/t/problem-setting-up-a-relay-node-in-testnet/64227/3 "2021-06-07T00:53:43Z")

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Thank you Alex, i tried 0.0.0.0 but no luck, also i changed the valency to 1, that did not work neither, i guess it has some to do with my firewall… i set the port 3001 open from the firewall, is taht equivalent to " fw allow OUT connections for port 3001"?

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<div class="post-metadata">

**Author:** ![Alicia](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/alicia/32/37748_2.png) [@Alicia](https://forum.cardano.org/u/Alicia)\
**Post date:** [7 June 2021 20:59 UTC](https://forum.cardano.org/t/problem-setting-up-a-relay-node-in-testnet/64227/4 "2021-06-07T20:59:34Z")

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The problem was that my server included some kind of DNS manager that was not properly working when I installed the firewall. Thank you so much for your help