https://community.cisco.com/t5/network-security/fmc-issue-communicatingwith-sensor/m-p/3175026#M1066752 <P>The communications between sensor and FMC is via tcp/8305.&nbsp;Both ends needs to be able to initiate.</P> <P>&nbsp;</P> <P>At the 4110 end the commuications are via the management interface assigned to the FTD logical device (not the chassis management port).</P> Thu, 24 Aug 2017 04:18:34 GMT Marvin Rhoads 2017-08-24T04:18:34Z https://community.cisco.com/t5/network-security/fmc-issue-communicatingwith-sensor/m-p/3174831#M1066751 <P>hi all,</P><P>&nbsp;</P><P>I have pair of 4110 in another site accessed via VPN.</P><P>is there any port or specific protocol that should be allowed on VPN so FMC can communicate with the FW?</P><P>&nbsp;</P><P>&nbsp;</P><P>the FW registers, it goes through discovery and de registers on FMC due to communication issue.</P><P>&nbsp;</P><P>What do you think it can be ?</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 21 Feb 2020 14:14:13 GMT https://community.cisco.com/t5/network-security/fmc-issue-communicatingwith-sensor/m-p/3174831#M1066751 cisco8887 2020-02-21T14:14:13Z https://community.cisco.com/t5/network-security/fmc-issue-communicatingwith-sensor/m-p/3175026#M1066752 <P>The communications between sensor and FMC is via tcp/8305.&nbsp;Both ends needs to be able to initiate.</P> <P>&nbsp;</P> <P>At the 4110 end the commuications are via the management interface assigned to the FTD logical device (not the chassis management port).</P> Thu, 24 Aug 2017 04:18:34 GMT https://community.cisco.com/t5/network-security/fmc-issue-communicatingwith-sensor/m-p/3175026#M1066752 Marvin Rhoads 2017-08-24T04:18:34Z