Router User Manual

3 Firewall troubleshooting
Nortel Secure Router 8000 Series
Troubleshooting - VAS
3-4 Nortel Networks Inc. Issue 01.01 (30 March 2009)
Figure 3-2 Diagnostic flowchart for faults on the firewall
Is network
connectivity
normal?
Check the status of
the interface and
exclude the fualts
at the link layer
Is the ACL
rule correct?
Reconfigure
the ACL rule
Is the traffic
behavior
correct?
Reconfigure the
traffic behavior
Is the traffic
policy correct?
Reconfigure the
traffic policy
Is a correct
trafffic policy
applied on the
interface?
Apply a correct
traffic policy
End
Seek
technology
support
Is the
problem
solved?
Firewall is invalid
Is the traffic
classification
correct?
Reconfigure the
traffic classification
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No