Examples of using Backend server in English and their translations into Russian
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Colloquial
The LDAP module does not"proxy" connections to Backend servers.
Usually the Backend servers are not directly accessible from the Internet.
The RADIUS module does not"proxy" connections to Backend servers.
You can add Frontend and Backend Servers to a Static Cluster at any time.
Physically connect the disk storage to some other Backend Server;
WebUser Interface Sessions are created on the Backend server that succeeds to open the target Account.
Shortage of processing power and/or disk space on Backend Servers.
Note: when configuring a Cluster Backend Server, you can specify the asterisk(*) symbol in the Forward To setting.
A certain amount of E-mail Messages can be generated directly on the Backend Servers.
If your Backend Servers use non-standard portnumbers for its services, change the Backend Server Ports values.
In this setup, each messages generated on a Backend Server is processed twice.
Backend Server often do not have direct access to the Internet, in this case they cannot deliver generated messages to remote systems.
Instead, it uses CLI to manage Account File Storage data on Backend servers.
If you decide to shut down a Static Cluster Backend Server, all Accounts hosted on that Server become unavailable.
To restore access to the Accounts hosted on the failed Server, its Account Storage should be connected to any other Backend server.
A flaw was found when mod_proxy_ajp connects to a backend server that takes too long to respond.
Since the network between Frontend and Backend Servers can be disabled for all types of communications except the CommuniGate Pro inter-server communications,breaking the Backend Server OS is virtually impossible.
Several vulnerabilities have been found in evolution-data-server, the database backend server for the evolution groupware suite.
If this information is stored locally on one backend server, then subsequent requests going to different backend servers would not be able to find it.
The Server SV2 acting as a Frontend Server will open a connection to the Server SV1 andwill use it as the Backend Server hosting the addressed Account.
After a sibling Backend server gets physical access to Account Storage of the failed server, you should modify the Directory so all Servers will contact the new"home" for Accounts in that Storage.
The"cracker" would then have to gothrough the firewall and break the security of the Backend Server OS in order to get access to any Account information.
If a Backend Server in a Static Cluster is shut down, all Accounts hosted on that Server become unavailable(there is no interrupt in service for Accounts hosted on other Backend Servers). .
Given a specific configuration,a remote attacker could send certain requests, putting a backend server into an error state until the retry timeout expired.
Frontend Servers accept incoming SMTP E-mail Messages and either relay them to remote locations or deliver them to local Accounts via Backends, using the special inter-cluster protocol,without placing messages into the Backend Server Queue.
If an address is routed to a domain listed in this table, the CommuniGate Pro Server uses its Clustering mechanism to connect to the Backend server at the specified address andperforms the requested operations on that Backend server.
If a Backend Server fails, the Static Cluster continues to operate, and access to Accounts on the failed Server can be restored within 2-10 minutes(depending on how easily the disk storage can be reassigned and how fast the Routing tables/Directory can be updated, or how quickly a stand-by Server can be switched on).
Use a file server partition or file directory for each Backend Account Storage, andmount that directory on some other Backend Server in case of a Backend Server failure.
If a Backend Server fails, the Static Cluster continues to operate, and access to Accounts on the failed Server can be restored within 2-10 minutes(depending on how easily the disk storage can be reassigned and how fast the Routing tables/Directory can be updated, or how quickly a stand-by Server can be switched on).
Incoming messages to unavailable Accounts will be collected in the Frontend Server queues, andthey will be delivered as soon as the Backend Server is added back or these Accounts become available on a different Backend Server(see below).