Hi @just13pro
Yeah, that is strange. I wrote that it was solved briefly due to workload. I will now give a detailed explanation.
2 months ago, we made an ip change in the region where we used the 1530 series device. After this change, 1530 was reconnected to the central management according to the new WAN IP address (with SIC.)
After so much time passed, we realized that there was no ping from the center to the sideA. that not only ping but also IP phone etc. nothing works.
When I checked, I saw that it was so, but ping is coming from sideA. When I looked at the logs, I saw these logs.
@;65686661;[cpu_0];[fw4_1];fw_log_drop_ex: Packet proto=1 10.99.5.20:2048 -> 172.16.0.10:16972 dropped by fw_ipsec_encrypt_on_tunnel_instance Reason: No error - tunnel is not yet established;
When I monitored the tunnel, I saw the above output (tunnel monitoring output). I realized that the tunnel was one-way UP. Then it occurred to me to check the community settings. (I think this was the first thing I should have done. sometimes this happens unfortunately. ) There was no problem with the community settings. When I looked at the 1530 firewall object, I realized that the WAN IP address was different. After changing the WAN IP address to the current one, the tunnel was up.
I don't understand how the tunnel worked for so long and ping, IP phone continued to work. As a result, the process worked like this. as a result, it is a fact that there is a STRANGE situation. or if there is an explanation, if anybody writes and enlightens this situation, I will learn something.
Thanks..