Which Three Types Of Servers Allow Hosts To Download Files
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If this parameter is yes for a service, then the share hosted by the service will only be visible to users who have read or write access to the share during share enumeration (for example net view \\sambaserver). The share ACLs which allow or deny the access to the share can be modified using for example the sharesec command or using the appropriate Windows tools. This has parallels to access based enumeration, the main difference being that only share permissions are evaluated, and security descriptors on files contained on the share are not used in computing enumeration access rights.
If this parameter is set to "false" Samba doesn't check permissions on "open for delete" and allows the open. If the user doesn't have permission to delete the file this will only be discovered at close time, which is too late for the Windows user tools to display an error message to the user. The symptom of this is files that appear to have been deleted "magically" re-appearing on a Windows explorer refresh. This is an extremely advanced protocol option which should not need to be changed. This parameter was introduced in its final form in 3.0.21, an earlier version with slightly different semantics was introduced in 3.0.20. That older version is not documented here.
The concept of a "port" is fairly foreign to UNIX hosts. Under Windows NT/2000 print servers, a port is associated with a port monitor and generally takes the form of a local port (i.e. LPT1:, COM1:, FILE:) or a remote port (i.e. LPD Port Monitor, etc...). By default, Samba has only one port defined--"Samba Printer Port". Under Windows NT/2000, all printers must have a valid port name. If you wish to have a list of ports displayed (smbd does not use a port name for anything) other than the default "Samba Printer Port", you can define enumports command to point to a program which should generate a list of ports, one per line, to standard output. This listing will then be used in response to the level 1 and 2 EnumPorts() RPC.
When set to legacy, only RC4-HMAC-MD5 is allowed. Avoiding AES this way has one a very specific use. Normally, the encryption type is negotiated between the peers. However, there is one scenario in which a Windows read-only domain controller (RODC) advertises AES encryption, but then proxies the request to a writeable DC which may not support AES encryption, leading to failure of the handshake. Setting this parameter to legacy would cause samba not to negotiate AES encryption. It is assumed of course that the weaker legacy encryption types are acceptable for the setup.
This boolean parameter is only relevant for systems that do not support standardized NFS4 ACLs but only a POSIX draft implementation of ACLs. Linux is the only common UNIX system which does still not offer standardized NFS4 ACLs actually. On such systems this parameter controls whether smbd(8) will attempt to map the 'protected' (don't inherit) flags of the Windows ACLs into an extended attribute called user.SAMBA_PAI (POSIX draft ACL Inheritance). This parameter requires support for extended attributes on the filesystem and allows the Windows ACL editor to store (non-)inheritance information while NT ACLs are mapped best-effort to the POSIX draft ACLs that the OS and filesystem implements.
This parameter can take three different values, which tell smbd(8) how to display the read only attribute on files, where eitherstore dos attributes is set to No, or no extended attribute ispresent. If store dos attributes is set to yes then thisparameter is ignored. This is a new parameter introduced in Samba version 3.0.21.
This is a list of NetBIOS names that nmbd will advertise as additional names by which the Samba server is known. This allows one machine to appear in browse lists under multiple names. If a machine is acting as a browse server or logon server none of these names will be advertised as either browse server or logon servers, only the primary name of the machine will be advertised with these capabilities.
This boolean option tells smbd whether to issue oplocks (opportunistic locks) to file open requests on this share. The oplock code can dramatically (approx. 30% or more) improve the speed of access to files on Samba servers. It allows the clients to aggressively cache files locally and you may want to disable this option for unreliable network environments (it is turned on by default in Windows NT Servers).
This boolean option tells smbd whether toglobally negotiate SMB2 leases on file open requests. Leasing is an SMB2-onlyfeature which allows clients to aggressively cache files locally above andbeyond the caching allowed by SMB1 oplocks.
When you have an extent based filesystem it's likely that we can make use of unwritten extents which allows Samba to allocate even large amounts of space very fast and you will not see any timeout problems caused by strict allocate. With strict allocate in use you will also get much better out of quota messages in case you use quotas. Another advantage of activating this setting is that it will help to reduce file fragmentation.
This is a list of files and directories that are neither visible nor accessible. Each entry in the list must be separated by a '/', which allows spaces to be included in the entry. '*' and '?' can be used to specify multiple files or directories as in DOS wildcards.
In the previous section, you already saw an example of using groups inorder to cluster hosts that have the same function. This allows you,for example, to define firewall rules inside a playbook or roleaffecting only database servers:
This directive is used to specify a file in which a cached copy of object definitions should be stored. The cache file is (re)created every time Nagios is (re)started and is used by the CGIs. It is intended to speed up config file caching in the CGIs and allow you to edit the source object config files while Nagios is running without affecting the output displayed in the CGIs.
This option allows you to specify a command to be run after _____ host check, which can be useful in distributed monitoring. This command is executed after any event handler or notification commands. The 1_______ argument is the short name of a command definition that you define in your object configuration file. The maximum amount of time that this command can run is controlled by the ochp_timeout option. More information on distributed monitoring can be found here. This command is only executed if the obsess_over_hosts option is enabled globally and if the 2________________ directive in the host definition is enabled.
This option allows you to enable or disable checks for orphaned hoste checks. Orphaned host checks are checks which have been executed and have been removed from the event queue, but have not had any results reported in a long time. Since no results have come back in for the host, it is not rescheduled in the event queue. This can cause host checks to stop being executed. Normally it is very rare for this to happen - it might happen if an external user or process killed off the process that was being used to execute a host check. If this option is enabled and Nagios finds that results for a particular host check have not come back, it will log an error message and reschedule the host check. If you start seeing host checks that never seem to get rescheduled, enable this option and see if you notice any log messages about orphaned hosts.
Even if you have an older version of nfs-utils, adding these entriesis at worst harmless (since they will just be ignored) and at bestwill save you some trouble when you upgrade. Some sys admins chooseto put the entry ALL:ALL in the file/etc/hosts.deny, which causes any service thatlooks at these files to deny access to all hosts unless it isexplicitly allowed. While this is more secure behavior, it may alsoget you in trouble when you are installing new services, you forgetyou put it there, and you can't figure out for the life of you whythey won't work.
Tenable Nessus checks system hosts files for signs of a compromise (e.g., Plugin ID 23910). This option allows you to upload a file containing a list of IPs and hostnames that will be ignored by Tenable Nessus during a scan. Include one IP address and hostname (formatted identically to your hosts file on the target) per line in a regular text file.
Some platforms allows one to differentiate the I/O subset that required physical storage access from generic I/O which was handled by cache. Note that as the physical I/O is usually aligned to the filesystem page, there may be difference between the total and physical I/O even if the process tried to read just 1 byte.
Test the timestamp which is updated whenever the object is accessed, for example the file is read. Filesystem usually allows one to disable 3_____ updates using mount options, so this test will work only if the filesystem performs atime updates.
To create a nested host group, use the '/' forward slash separator, for example Europe/Latvia/Riga/Zabbix servers. You can create this group even if none of the three parent host groups (Europe/Latvia/Riga/) exist. In this case creating these parent host groups is up to the user; they will not be created automatically.
Leading and trailing slashes, several slashes in a row are not allowed. Escaping of '/' is not supported.
By default in openSUSE Leap, the DocumentRoot directory /srv/www/htdocs and the CGI directory /srv/www/cgi-bin belong to the user and group root. You should not change these permissions. If the directories are writable for all, any user can place files into them. These files might then be executed by Apache with the permissions of wwwrun, which may give the user unintended access to file system resources. Use subdirectories of /srv/www to place the DocumentRoot and CGI directories for your virtual hosts and make sure that directories and files belong to user and group root.
When enabling user directories (with mod_userdir or mod_rewrite) you should strongly consider not allowing .htaccess files, which would allow users to overwrite security settings. At least you should limit the user's engagement by using the directive AllowOverRide. In openSUSE Leap, .htaccess files are enabled by default, but the user is not allowed to overwrite any Option directives when using mod_userdir (see the /etc/apache2/mod_userdir.conf configuration file). 5376163bf9
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