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how to analysis the Firewalls zone configuration when cannot reachable by ping

Latest reply: Dec 29, 2018 05:38:51 1140 3 5 0 0

From dhcp user static ip is not reachable to usg6600

[Problem Analysis]



PC (getting IP from DHCP server) à Cisco Switch ( à USG6600 ( à S5720 ( à Server (


use the command of Firewalls session table check the session is empty

d f s t v s i

[Root Cause] 

The port g1/0/2 and g1/0/3 donot add to the trust zone ,leadding to the session is cannot built up

add interface (Security zone view) <>

[Solution Description]

The main issue is from PC cannot ping server. From PC can ping until S5720. After login into the S5720, we find that the switch cannot ping the server. However, from the USG we can ping the server successfully.

[C-USG6650-FW]firewall  zone  trust

[FICUS-NOC-USG6650-FW-zone-trust]add inter g1/0/2

[FICUS-NOC-USG6650-FW-zone-trust]add inter g1/0/3



Check the session is built upOK

 icmp  VPN: public --> public  Vlan: 100 -->

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Created Dec 29, 2018 03:18:02

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Created Dec 29, 2018 03:18:41

If the firewall is seldom configured, you may forget to add the port to the firewall zone. More steps should be taken to compare routers and switches between firewalls.
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Created Dec 29, 2018 05:38:51

so the root cause is interface has not added into firewall zone , so careful , thank you a lot .
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  • x
  • convention:


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