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Hi! I have no problems whatsoever connecting over LAN, but trying to connect externally will never work. I have port forwarded port no. 800 (which I use for FTP due to other service using 21), and 990, aswell as 50000-50100. But this problem never stops. Any help would be appreciated since I have no idea what the problem is.

I am using 50000-50100 for Custom port range in Passive, aswell as "The following IP".

Serverlog:

425 Can't open data connection for transfer of "/"

Ftptest.net log:
Reply: 425 Can't open data connection for transfer of "/"

Error: Listing failed

Please post a complete and unmodified log from https://ftptest.net/

botg wrote: ↑

2018-10-10 20:53

Please post a complete and unmodified log from https://ftptest.net/

Warning: Selected port (800) is not the default port (21) of the selected protocol.

Status: Resolving address of XXXXX

Status: Connecting to XXXXX

Warning: The entered address does not resolve to an IPv6 address.

Status: Connected, waiting for welcome message...

Reply: 220 Välkommen till serverbackup, följande specifikationer: i5 4690k, 12GB DDR3,

Command: CLNT https://ftptest.net on behalf of XXXXX

Reply: 200 Don't care

Command: AUTH TLS

Reply: 234 Using authentication type TLS

Status: Performing TLS handshake...

Status: TLS handshake successful, verifying certificate...

Status: Received 1 certificates from server.

Status: cert[0]: subject='C=SE,ST=Västra Götaland,L=Borås' issuer='C=SE,ST=Västra Götaland,L=Borås'

Command: USER anonym

Reply: 331 Password required for anonym

Command: PASS ***********************

Reply: 230 Logged on

Command: SYST

Reply: 215 UNIX emulated by FileZilla

Command: FEAT

Reply: 211-Features:

Reply: MDTM

Reply: REST STREAM

Reply: SIZE

Reply: MLST type*;size*;modify*;

Reply: MLSD

Reply: AUTH SSL

Reply: AUTH TLS

Reply: PROT

Reply: PBSZ

Reply: UTF8

Reply: CLNT

Reply: MFMT

Reply: EPSV

Reply: EPRT

Reply: 211 End

Command: PBSZ 0

Reply: 200 PBSZ=0

Command: PROT P

Reply: 200 Protection level set to P

Command: PWD

Reply: 257 "/" is current directory.

Status: Current path is /

Command: TYPE I

Reply: 200 Type set to I

Command: PASV

Reply: 227 Entering Passive Mode (XXXXX,195,176)

Command: MLSD

Reply: 425 Can't open data connection for transfer of "/"

Error: Listing failed

Does your router correctly forward the range of ports? Some cannot do it or have a rather surprising syntax for it.

botg wrote: ↑

2018-10-11 18:09

Does your router correctly forward the range of ports? Some cannot do it or have a rather surprising syntax for it.

Yes, Filezilla is the first program to malfunction. I have hosted a variety of gameservers, I also have a Synology NAS which functions without a problem.