Top Forums Programming Open Source Project planing - with Linux based solutions Post 302939793 by AQwert on Sunday 29th of March 2015 05:24:59 AM
Project planing - with Linux based solutions

Hello,

Please suggest or share any of your experience for the following requests:


Request:
1.
Creation of the local network.
The company will be in the field of IT.
10-15 persons. 10 will be physically in the office.

The local network should be secured and all the files and documents should be encrypted.
The network should have possibility of VPN or some other secure distance connection to internal network (to gain access to internal documentation or software)
Type of open source firewall? Should it be on separate server?
For the router: not sure yet, will see the budget, but probably will configure some Cisco router or Linux version (any suggestion for linux server router os?)


Request:

To create network architecture, including solution of back-up server.
To choose type of servers and OS that will be used.

2. Creation of secured email communication.
All the emails should be encrypted.
All the emails on the email server should be kept in encrypted format.
Need to choose server OS.
Need to choose server type that will correspond to request.

3. Choosing and integrating internal management system - ERP software.
Example: Alfresco or BitrixSoft)
===

So my questions:

If for the beginning will decide to use only open source free based software.
What can be sugested.
For the beginning, for example, will have 2 servers.
1 server for: local network, files sharing, hosting of intranet website, email.
What open source virtualization software can be suggested to use on this server to separate resources between Main Local server, Email Server, File server, Intranet hosting server?
What can be suggested from Linux distributions to use as main local server (user control, access ect.)?
What can be suggested as Linux email server? (should include encryption as describe below, option of calendar, tasks and all futures as closed as possible to Exchange of Microsoft) - and what are the most user-friendly options?

Is their any suggestion for ERP software beside Alfresco or BitrixSoft (I tested Bitrix - and it is really good, but expensive for the beginning...). Is their any good open source ERP solutions?

2. server for back up. What solution can be suggested here?

===

Also, for later steps of software development need to choose the standard of software process development.
What can be suggested?

Examples:
Rational Unified Process (RUP)
MICROSOFT SOLUTIONS FRAMEWORK (MSF)

Thank you in advance
 
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nfs(7)							 Miscellaneous Information Manual						    nfs(7)

NAME
nfs, NFS - network file system DESCRIPTION
The Network File System (NFS) allows a client node to perform transparent file access over the network. By using NFS, a client node oper- ates on files residing on a variety of servers and server architectures, and across a variety of operating systems. File access calls on the client (such as read requests) are converted to NFS protocol requests and sent to the server system over the network. The server receives the request, performs the actual file system operation, and sends a response back to the client. NFS operates in a stateless manner using remote procedure calls (RPC) built on top of an external data representation (XDR) protocol. The RPC protocol enables version and authentication parameters to be exchanged for security over the network. A server grants access to a specific file system to clients by adding an entry for that file system to the server's file. A client gains access to that file system using the command to request a file handle for the file system (see mount(1M)). (A file handle is the means by which NFS identifies remote files.) Once a client mounts the file system, the server issues a file handle to the client for each file (or directory) the client accesses. If the file is removed on the server side, the file handle becomes stale (dissociated with a known file), and the server returns an error with set to A server can also be a client with respect to file systems it has mounted over the network; however, its clients cannot directly access those file systems. If a client attempts to mount a file system for which the server is an NFS client, the server returns with set to The client must mount the file system directly from the server on which the file system resides. The user ID and group ID mappings must be the same between client and server. However, the server maps UID 0 (the superuser) to UID -2 before performing access checks for a client. This process prevents gaining superuser privileges on remote file systems. RETURN VALUE
Generally, physical disk I/O errors detected at the server are returned to the client for action. If the server is down or inaccessible, the client receives the message: where is the hostname of the NFS server. The client continues resending the request until it receives an acknowledgement from the server. Therefore, the server can crash or power down, and come back up without any special action required by the client. The client process requesting the I/O will block, but remains sensitive to signals (unless mounted with the option) until the server recovers. However, if mounted with the option, the client process returns an error instead of waiting indefinitely. AUTHOR
was developed by Sun Microsystems, Inc. SEE ALSO
exportfs(1M), share(1M), mount(1M), mount_nfs(1M), nfsd(1M), mount(2), fstab(4), dfstab(4). nfs(7)

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