Wireshark not running because of iptables

Hi!
I’m using Wireshark docker, it works pretty well until I activate my iptables rules where default rule is
iptables -P INPUT DROP
If this rule is activated when browsing http://yourhost:3000/, connection is acctepted, I have a blank screen but guacamole never start. Here are logs of my container:

[2021-01-12 11:16:07] [Connection 2] Client connection open
[2021-01-12 11:16:07] [Connection 2] Opening guacd connection
[2021-01-12 11:16:17] [Connection 2] Closing connection with error: Error: guacd was inactive for too long
at GuacdClient.checkActivity (/gclient/node_modules/guacamole-lite/lib/GuacdClient.js:35:41)
at listOnTimeout (internal/timers.js:554:17)
at processTimers (internal/timers.js:497:7)
[2021-01-12 11:16:17] [Connection 2] Closing guacd connection
[2021-01-12 11:16:17] [Connection 2] Client connection closed

Which rule should I add to autorise guacamole to start?
Thanks.