Hi,
I could not get a directory listing when connecting through one ISP but got it without problem when connecting through another ISP (in both cases, the connection was to my sever located in a different network and using the same client on the same machine [lap top]). Could this be due to the fact either the first ISP either blocks some ports or that I requested PROT P "matching exactly" and that the IP addresses of the peer used for for the communication channel and that used for the data transfer did not match exactly ? Incidentally, and just to make sure, which is the peer to consider: my lap top (where the client is), the ISP to which I'm connected, the ISP to which my server is connected, or my server it-self ?
Log of connection that failed
---------------------------------
(000003)22/1/2020 11:07:28 AM - (not logged in) (81.242.0.33)> Connected on port 21, sending welcome message...
(000003)22/1/2020 11:07:28 AM - (not logged in) (81.242.0.33)> 220 Welcome to Bornival...
(000003)22/1/2020 11:07:28 AM - (not logged in) (81.242.0.33)> AUTH TLS
(000003)22/1/2020 11:07:28 AM - (not logged in) (81.242.0.33)> 234 Using authentication type TLS
(000003)22/1/2020 11:07:29 AM - (not logged in) (81.242.0.33)> TLS connection established
(000003)22/1/2020 11:07:29 AM - (not logged in) (81.242.0.33)> USER xxx
(000003)22/1/2020 11:07:29 AM - (not logged in) (81.242.0.33)> 331 Password required for xxx
(000003)22/1/2020 11:07:29 AM - (not logged in) (81.242.0.33)> PASS ************
(000003)22/1/2020 11:07:34 AM - xxx (81.242.0.33)> 230 Logged on
...
(000003)22/1/2020 11:07:34 AM - xxx (81.242.0.33)> PROT P
(000003)22/1/2020 11:07:34 AM - xxx (81.242.0.33)> 200 Protection level set to P
...
(000003)22/1/2020 11:07:35 AM - xxx (81.242.0.33)> PASV
(000003)22/1/2020 11:07:35 AM - xxx (81.242.0.33)> 227 Entering Passive Mode (79,xxx,xxx,227,117,83)
(000003)22/1/2020 11:07:35 AM - xxx (81.242.0.33)> MLSD
(000003)22/1/2020 11:07:45 AM - xxx (81.242.0.33)> 425 Can't open data connection for transfer of "/"
(000003)22/1/2020 11:07:53 AM - xxx (81.242.0.33)> disconnected.
The port requested is 117*256+83= 30035 (which is within the range defined [30000-30103] and port forwarded by the NAT router beyond which my server is.
Log of connection that worked
-----------------------------------
(000007)22/1/2020 12:02:20 PM - (not logged in) (195.244.180.220)> Connected on port 21, sending welcome message...
(000007)22/1/2020 12:02:20 PM - (not logged in) (195.244.180.220)> 220 Welcome to Bornival...
(000007)22/1/2020 12:02:20 PM - (not logged in) (195.244.180.220)> AUTH TLS
(000007)22/1/2020 12:02:20 PM - (not logged in) (195.244.180.220)> 234 Using authentication type TLS
(000007)22/1/2020 12:02:23 PM - (not logged in) (195.244.180.220)> TLS connection established
(000007)22/1/2020 12:02:29 PM - (not logged in) (195.244.180.220)> USER xxx
(000007)22/1/2020 12:02:29 PM - (not logged in) (195.244.180.220)> 331 Password required for xxx
(000007)22/1/2020 12:02:48 PM - (not logged in) (195.244.180.220)> PASS ************
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> PROT P
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> 200 Protection level set to P
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> PASV
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> 227 Entering Passive Mode (79,xxx,xxx,227,117,111)
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> MLSD
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> 150 Opening data channel for directory listing of "/"
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> TLS connection for data connection established
(000007)22/1/2020 12:02:49 PM - xxx (195.244.180.220)> 226 Successfully transferred "/"
The port requested is 117*256+111=30063 (also within defined range [see above])
425 Can't open data connection for transfer of "/
Moderator: Project members
Re: 425 Can't open data connection for transfer of "/
Which version of FileZilla Server are you using?
What client software (product and version) are you using?
Is it always failing on this particular port?
What client software (product and version) are you using?
Is it always failing on this particular port?