Lan Network -->Firewall A----->switch -->-Firewall B ---->Internet-------->Database server
We are facing issue to connect database server from our lan network.
We took packet capture on Firewall A and firewall B .
When we initiate traffic from LAN network to database server:
Firewall B ; We are getting client Hello and server hello message on Firewall B
Firewall A: Only client hello message we got means server hello message drop by firewall A
that why we could not able to connect with database server.
We are not using any decryption and proxy we have checked counter value also we did not get any drop.
traffic monitor logs session end reason: TCP-rst by client
Is the assumption correct, that both firewalls are paloalto firewalls?
Anyway, when you say "Firewall A: Only client hello message we got means server hello message drop by firewall A", does this really mean the server hello is dropped by firewall A or isn't there any server hello on firewall A which would mean that the server hello is dropped by firewall B.
Are both firewalls have same model and same PAN OS?
Check the security policy on Firewall A and B and compare them?
Make sure they are similar in security profiles.
Look for threat logs in Firewall A if any traffic is denied there?
When you did packet capture do you see any drops on firewall A and B?
Use this command test security policy on both Firewall A and B
Also as Remo mentioned when you do the pcap check global counters on both Firewalls and look for drops?
Did you solve this problem. We are facing similar issue.
client->palo alto->f5 reverseproxy->webapp server
We could notice that the f5 is receiving client-hello and it is responding with server hello. A PCap at the PA shows that the server hello is recd. But a packet capture at the client shows no server-hello message. There is no specific change we did in the environment and suddenly this issue has cropped up.
When we bypassed firewall and routed the traffic directly from Client to f5, the web page loads properly.
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