How to configure a new user on the file system / User rights

FAQ #101052

 

Group IDs
On the FTP server there are eight different groups.

User4 0x80

User3 0x40

User2 0x20

User1 0x10

WEB 0x08

Down- load 0x04

CONFIG 0x02

reserve PLC 0x01

The parameters of the user defintion are:
username:     is a string including space and any special characters
Password:      is a string including space and any special characters
GroupID:       is a value specifying the user group e.g a file created by this user will belong to that. The value is given as hexadecimal value
AccessGroup: is a value specifying the file system access group(s).A file / directory will be accessible if it belongs to the given. The value is given as a hexadecimal value
AccessType:   Access can be limited to RD_ONLY default is RD_WR (read write)

Examples:

Example of two different users and their access group:

Username=master,haveaccess,0x04,0xFE
0xFE=1111 1110 binary
Access rights:

User4 0x80	User3 0x40	User2 0x20	User1 0x10	WEB 0x08	Down- load 0x04	CONFIG 0x02	reserve PLC 0x01
Yes	Yes	Yes	Yes	Yes	Yes	Yes	No

This user has the username: master; Password: haveaccess, he belongs to the group Download 0x04 and he has access to all groups expect reserve / PLC

Username=limited,,0x80,0x80,rd_only
0x80=1000 0000 binary
Access rights:

User4 0x80	User3 0x40	User2 0x20	User1 0x10	WEB 0x08	Down- load 0x04	CONFIG 0x02	reserve PLC 0x01
rd_only	No	No	No	No	No	No	No

This user has the username: limited;no Password:, he belongs to the group User4 0x80 and he has only access to the group User4 and just read access.

A user should never have acces to the group 0x01 since this is reserved for internal functions and will lead to problems if it is accessed.

Each user belongs to just one group but can have access to several groups. If a user writes a file he is the owner of this file. Another user can only access this file if he has access to the group where the owner of the file belongs.