<p>When starting the plutus-playground-server in a nix-shell on an Ubuntu 20.04 machine (ref. step 4 in the <a href="https://docs.google.com/document/d/13112LHG9vVvNUs40oZSqZ-DF6_yFiT_SJZ2NaEmjMM4/edit" rel="nofollow noreferrer">plutus setup instructions</a>), it terminates with the following error:</p>
<pre><code>Interpreter ready
plutus-playground-server: Network.Socket.socket: unsupported operation (Address family not supported by protocol)
</code></pre>
<p>Coincidently, when attempting to start a daedalus wallet on this machine after upgrading from 4.5.2. to 4.6.0, the node crashes due to what appears to be an ipv6 issue (ref. <a href="https://github.com/input-output-hk/cardano-node/issues/3449" rel="nofollow noreferrer">If the ipv6 is disabled on the system, the node crashes on boot #3449</a>). I'm wondering now whether these issues are related?</p>
<p>I believe I have the latest tools and libraries installed: ghc version 8.10.4.20210212, cabal version 3.6.2.0, nix version 2.5.1.</p>
<p>If the issue in Github is related, there's some speculation about NordVPN, which I use on that machine: Here's some details:</p>
<pre><code>    /etc/sysctl.conf
    
    # Disable IPV6 to prevent IPv6 leaks with NordVPN 
    net.ipv6.conf.all.disable_ipv6 = 1
    net.ipv6.conf.default.disable_ipv6 = 1
    net.ipv6.conf.lo.disable_ipv6 = 1
    net.ipv6.conf.tun0.disable_ipv6 = 1

&gt; ip addr show

1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: enp0s31f6: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 38:d5:47:25:6d:81 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global dynamic noprefixroute enp0s31f6
       valid_lft 49116sec preferred_lft 49116sec
3: virbr0: &lt;NO-CARRIER,BROADCAST,MULTICAST,UP&gt; mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:82:ef:25 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: &lt;BROADCAST,MULTICAST&gt; mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:82:ef:25 brd ff:ff:ff:ff:ff:ff
5: docker0: &lt;NO-CARRIER,BROADCAST,MULTICAST,UP&gt; mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:95:7a:3c:75 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
</code></pre>

CC BY-SA 4.0
2022-01-15T03:34:19.037Z
can you provide output of `ip addr show`?
Samuel Leathers
CC BY-SA 4.0
2022-01-16T03:49:44.707Z
Welcome to Cardano SE! As a new user be sure to take the [Tour].
gRebel
<plutus><plutus-pioneer-program><plutus-playground>
plutus-playground-server exits with with network error
# plutus-playground-server exits with with network error

(Asked by: username_0 on 2022-01-14)

When starting the plutus-playground-server in a nix-shell on an Ubuntu 20.04 machine (ref. step 4 in the plutus setup instructions), it terminates with the following error:
Interpreter ready
plutus-playground-server: Network.Socket.socket: unsupported operation (Address family not supported by protocol)

Coincidently, when attempting to start a daedalus wallet on this machine after upgrading from 4.5.2. to 4.6.0, the node crashes due to what appears to be an ipv6 issue (ref. If the ipv6 is disabled on the system, the node crashes on boot #3449). I'm wondering now whether these issues are related?
I believe I have the latest tools and libraries installed: ghc version 8.10.4.20210212, cabal version 3.6.2.0, nix version 2.5.1.
If the issue in Github is related, there's some speculation about NordVPN, which I use on that machine: Here's some details:
    /etc/sysctl.conf
    
    # Disable IPV6 to prevent IPv6 leaks with NordVPN 
    net.ipv6.conf.all.disable_ipv6 = 1
    net.ipv6.conf.default.disable_ipv6 = 1
    net.ipv6.conf.lo.disable_ipv6 = 1
    net.ipv6.conf.tun0.disable_ipv6 = 1

> ip addr show

1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: enp0s31f6:  mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 38:d5:47:25:6d:81 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global dynamic noprefixroute enp0s31f6
       valid_lft 49116sec preferred_lft 49116sec
3: virbr0:  mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:82:ef:25 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic:  mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:82:ef:25 brd ff:ff:ff:ff:ff:ff
5: docker0:  mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:95:7a:3c:75 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever

**Tags:** plutus, plutus-pioneer-program, plutus-playground
> **Comments:**
> **username_1**: can you provide output of `ip addr show`?  
> **username_2**: Welcome to Cardano SE! As a new user be sure to take the [Tour].  

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## 0 answers

