Does the FRWL accept chain apply to packets arrived on a UDP socket (created with AT#SD)?
If yes, what are the consequences of not issuing the FRWL at all?
The documentation says default setting is ‘drop’ and therefore I would expect nothing to work if I hadn’t issued FRWL but I am seeing my units working without FRWL which leads me to think it is ignored for UDP
GE865 FW 10.1.0 & 10.0.5
Thanks for help and advice,
The firewall rules (AT#FRWL) applies to all protocols on the transport layer (TCP and UDP).Outbound connections creates automatically a dynamic firewall rule for the period of that connection.
Therefore, for the connections created with AT#SD, you do not have to create a static firewall rule before, with AT#FRWL.
A static firewall rule must be created only for inbound connections (eg. for AT#SL).All above is valid for TCP and UDP.
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