i have a client that use a progam for train ticket online order that can’t work under my new configuration after the router has been reset to default, what is the possible problem about that and what’s is thesuggestion for the solution? the train company said it might be the port 6666 problem, so how doi can make it work about it!
if you haven’t blocked port 6666 then it should work just like everything else.
i think i didn’t block the 6666 port cuz the configuration now by default after i reinstall the router, could you tell me where i can see if the port is blocked?
thanks for the respon! 
if you didn’t block it, then it’s not blocked. see /ip firewall filter print
there’s no bloking set up for the 6666 port but in ip firewall set up there’s some feature that disable wich is
->/ip firewall filter add chain=forward protocol=tcp tcp-flags=syn connection-limit=6,32 action=drop
->/ ip firewall filter add chain=input connection-state=invalid action=drop comment=“Drop Invalid connections”
->add chain=input src-address=192.168.0.0/24 action=accept comment=“Allow access to router from known network”
->/ip firewall filter add chain=input action=drop comment=“Drop anything else”
->/ip firewall filteradd chain=forward protocol=tcp connection-state=invalid action=drop comment=“drop invalid connections”
->/ip firewall filter add chain=icmp action=drop comment=“deny all other types”
what do you think 'bout that, n tell me the best suggestion about this?
remove the rule which limits connection number. 5 connections is too little, maybe this causes problems
the rule no 5 in disable mode should i removing it or enabling it?
I was talking about this rule:
/ip firewall filter add chain=forward protocol=tcp tcp-flags=syn connection-limit=6,32 action=drop
disabling is fine!
so it’s not the problem, right! could you tell me please wich rules that imust disabling for the best result?
& waht about the configuration of ip firewall service ports which service ports that must be enable n wich one must be disable?