One of our European location is encountering below 2 errors on their firewall.
Expected SYN, got FIN-ACK & Expected SYN, got RST
this firewall is non-cisco product. these are seen more in lines where internet users try using organisation web
server inside their secure zone segment. no problems have been reported out of these, but it is seen very frequently.
Any help will be highly appreciated,
I applaude your confidence in Cisco products and engineers.
I googled this "expected syn got fin ack" and found this link
which pretty much says to read the error message as
Expected SYN-ACK, got FIN-ACK &
Expected SYN-ACK, got RST
Meaning the second packet of the 3-way hand shake does not arrive.
Pls. collect wireshark (http://www.wireshark.org) captures and find out who is sending the reset or the fin-ack.