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

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Description	This article explains that after creating an ISDB Telegram in the Firewall policy, the Telegram call failed and traffic matched the implicit policy.
Scope	ISDB.
Solution	Currently, Telegram ISDB only allows 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: It is necessary to restart the 'internet-service' service using the command below in order for it to take effect. execute internet-service refresh Or: execute internet-service4 refresh