Drop-reason: (acl-drop) Flow is denied by configured rule

[CY Ko]

Actually, I want to allow FTP from outside to inside, but the packet tracer display "Drop-reason: (acl-drop) Flow is denied by configured rule".   I must be wrong something.  I have attached my config.  Any assistance would be greatly appreciated.

[Sheraz.Salim]

try this

object network ANY
 subnet 0.0.0.0 0.0.0.0
nat (outside,inside) source dynamic ANY   interface destination static FTP_Inside FTP_Inside service FTP FTP

                                                       ---    --------

"Where ANY is outside world could be any public ip address and interface mean your ASA outside interface"

also

remove this

no same-security-traffic permit inter-interface
no same-security-traffic permit intra-interface

make sure you do this in change window.

Regards.

[Sheraz.Salim]

I had a look on your config here are my thoughts

ASA Version 9.1(2)
!
!
interface GigabitEthernet0/0
 nameif outside
 security-level 0
 ip address dhcp
!
interface GigabitEthernet0/1
 nameif inside
 security-level 100
 ip address 192.168.1.254 255.255.255.0
!
ftp mode passive
//////////////////////NO NEED TO THESE COMMAND////////
no same-security-traffic permit inter-interface
no same-security-traffic permit intra-interface
/////////////////////////////////////////////////////////
!
object network INSIDE_SUBNET
 subnet 192.168.1.0 255.255.255.0
 nat (inside,outside) source dynamic any interface
!
object service FTP
 service tcp destination eq ftp
!
object network FTP_Inside (TRY THIS- DO packet tracer input outside tcp 8.8.8.8 12345 192.168.1.24 ftp detail)
 host 192.168.1.24
  nat (inside,outside) static interface service tcp ftp ftp /////THIS RULE WILL CONNTED THE OUTSIDE CLIENT to ASA OUTSIDE INTERFACE IP, THAN ASA WILL MAPPED THE OUTSIDE IP TO FTP_Inside//////
!
object network FTP_Outside
 host x.x.x.x   (Public IP??)
!
object service Passive_FTP
 service tcp destination range 30000 35000
!
object service passive_FTP
 service tcp destination range 30000 35000
!
object-group protocol TCPUDP
 protocol-object udp
 protocol-object tcp
!
////
access-list Outside_access_in extended permit tcp any host 192.168.1.24
////
no access-list Outside_access_in extended permit tcp object FTP_Outside object FTP_Inside eq ftp
no access-list Outside_access_in extended permit tcp object FTP_Outside object FTP_Inside eq ftp-data
no access-list Outside_access_in extended permit tcp any object FTP_Outside eq ftp
///////////////////////////////////////////////

/////You dont need this as traffic from inside to outside (higher to lower) does not need access-rule////
no access-list inside_access_in extended permit ip any any
///////////////////////////////////////////////////////////
access-list global_access extended permit tcp any any


//////////////////////////////////DONT NEED THIS//////////////////////
nat (outside,outside) source dynamic any interface destination static FTP_Inside FTP_Inside service FTP FTP
/////////////////////////////////////////////////////////////////////////////////////////////////////////////


access-group Outside_access_in in interface outside

/////////////////////////////////NO NEED THIS////////////////////
access-group inside_access_in in interface inside
/////////////////////////////////////////////////////////////////////////



access-group global_access global
route outside 0.0.0.0 0.0.0.0 x.x.x.x 1

[CY Ko]

Dear sherazrose,

1. object network FTP_Inside (TRY THIS- DO packet tracer input outside tcp 8.8.8.8 12345 192.168.1.24 ftp detail)
host 192.168.1.24
Ans: It still the same problem.

2. host x.x.x.x (Public IP??)
Ans:Yes

What should I next step? Thanks.

[mkazam001]

you need these cmds to allow the asa to keep the connections in the state table:

policy-map global_policy

class inspection_default

inspect ftp

ensure you have both of these in the object group:

object-group service obj-ftp tcp

port-object eq ftp

port-object eq ftp-data

access-list outside-in extended permit tcp any host ftp-svr-ip object-group obj-ftp       - enter actual svr ip

try packet-tracer input outside tcp source-ip 12345 ftp-svr-ip 21 det - to get info on where the problem may lie     - enter actual ftp server ip

regards, mk

please rate if helpful or solved :)

[Sheraz.Salim]

hi mkazam001 i thought the nat problem issue as if you see the nat statement its wrong?

[mkazam001]

i didn't mention that as you already had - nat (outside,outside) is incorrect

regards, mk

[CY Ko]

Dear mkazam001,

After that, it still the same problem. Do you have any idea what's problem is it?

[Sheraz.Salim]

yes fix you nat statement.

[venkat_n7]

looks like, it should be nat issue. and also use "object-group's" instead of "object network's" to be more clear with config. 

creat an object grroup for ftp ports and add them in it and then use in acl to allow.