If only syn,ack seems to be making it through and not the rest, this looks like a behaviour of a firewall or proxy is on the path, and the firewall/proxy is the one answering the syn,ack instead of the client (so it's proxying the tcp connection befo...

yes you can open a TAC service reqeust from the forums now, it will open the same type of request as you did by phone, but the advantage is that all the thread information will be present in the SR already.But since you did open one already, no need ...

Hi Marc.i recommend openeing a TAC Service request from this thread so an Engineer can dedicate his time to work with you to troubleshoot this.Best regards,Fadi.

Hi. without seeing the full router's config we can't really say. the acl you mentioned is pure layer 4. but if it's used in conjunction with with CBAC or zone-based firewall, then you have more layers involved.also acls on their own are unidrectional...

Hi. the tcpy syn,ack has no data in it so it's pure layer 4 packet. while your packets have data, this data might have been blocked by a layer 7 firewall for some reason.All of this is just speculation right now, without actually seeing the packets o...