Technical Tip : Telegram Internet Service not working for Telegram voice call

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Description	This article explains that after creating ISDB Telegram in Firewall policy, Telegram call failed and traffic match implicit policy.
Scope	ISDB
Solution	Currently Telegram ISDB only allow protocol 6, TCP ports 80, 443, 5222. Traffic seen in customer logs is using protocol 17, UDP ports 1400, 40317, 56110. Run the following command to enable UDP ports 1-65535 for Telegram ISDB. # config firewall internet-service-addition     edit 11010249     # config entry         edit 1             set protocol 17             # config port-range                 edit 1             end         end      end NOTE. Need to restart the 'internet-service' service using the command below in order for it to take effect. # execute internet-service refresh