Zywall 310 allow only one IP public FTP port

steve15f · June 2019

Hi dear,

i wanted to know if it's possible to open the FTP port (21) for only one external IP ?

thanks

PeterUK · June 2019

Why yes just setup the firewall to allow one source IP when you setup a address object for host of the IP.

steve15f · June 2019

Hi,

thanks for your reply

i'm trying to allow FTP from external users but it's not working, can you help me ?

you can see attach the policy control and NTP rule ...

FTP TCP port 21

i've an error on the connection :

Statut : Connexion à x.x.x.x:21...

Statut : Connexion établie, attente du message d'accueil...

Statut : Serveur non sécurisé, celui-ci ne supporte pas FTP sur TLS.

Commande : USER FTP-User

Réponse : 331 Password required for User

Commande : PASS ********************

Réponse : 530 Login incorrect.

Erreur : Erreur critique : Impossible d'établir une connexion au serveur

For information ,with the Same rule (but with port 22) it's working in SFTP (SSH FTP)

it's a FTP on a synology

ty

PeterUK · June 2019

Do you have ALG for FTP enabled with FTP transformations?

Your FTP logs show Login incorrect so traffic is getting to the FTP server.

steve15f · July 2019

Hi PeterUK

thanks for your reply but i'm sorry i don't know about ALG, what is it and where can i show this ? thanks

PeterUK · July 2019

Its in the Zywall 310

Network > ALG

it allow the FTP traffic to work for other ports the FTP needs.

It might not help as your getting Login incorrect so check your user name and password.

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