Free loopback software for mac

loopBlock will let an administrative user on a local computer (running Mac OS 10.2 or later) declare certain domain names, and IP addresses "blocked". This will disallow the users on the system access to any network or computer listed.
This program modifies the "/etc/hosts" file, adding domain names or IP addresses to the list of hosts in the file. These domain names, or addresses are set to route to the "loopback" address on the machine. This will cause any lookup of a name listed in loopBlock to route to the local machine. At that point, the machine will either access services on the local computer (eg. personal web sharing). This way, the administrator can set up a "restricted access" index.html page to let other users know that they cannot access the requested name or address (this may be implemented in possible future versions).
To use the program, enter domain names, or IP addresses of computers that should be "blocked". Push the return key, or press the "Block" button to add the name to the list. You must push the "Save" button to apply the settings. This is where an administrative name or password is needed to save the list.
This software has an import function that will allow the user to import entries from a Comma Delimited Text File (.CSV). Select "Import" from under the "File" menu, and select the file that contains the data you wish to import.
The program will let the user flush the lookupd cache. This option is available in "Preferences" under the "loopBlock" menu. This helps in some instances, because Mac OS X consults that cache before the configuration files that loopBlock modifies (/etc/hosts).
Enhancements:
- Bux fix: no longer assigns incorrect permissions when replacing hosts file
- Added import option under file menu.
- Added function that flushes lookupd cache.

Netatalk is a freely-available, kernel level implementation of the AppleTalk Protocol Suite, originally for BSD-derived systems. A *NIX/*BSD system running netatalk is capable of serving many macintosh clients simultaneously as an AppleTalk router,
AppleShare file server, *NIX/*BSD print server, and for accessing AppleTalk printers via Printer Access Protocol (PAP). Included are a number of minor printing and debugging utilities.
NOTE: Netatalk is licensed and distributed under the terms of the BSD License and GNU General Public License (GPL).

System requirements:
- Berkeley DB libraries AND headers

Enhancements
- REM: remove timeout
- NEW: afpd: DHX2 uams using GNU libgcrypt.
- NEW: afpd: volume options illegalseq, perm and invisibledots
- ilegalseq encode illegal sequence in filename asis, ex "217-", which is not
- a valid SHIFT-JIS char, is encoded as U217 -.
- perm value OR with the client requested permissions. (help with OSX 10.5
- strange permissions).
- Make dot files visible by default with usedots, use invisibledots
- for keeping the old behavior, ie for OS9 (OSX hide dot files on its
- own).
- NEW: afpd: volume options allow_hosts/denied hosts
- NEW: afpd: volume options dperm/fperm default directory and file
- permissions or with server requests.
- NEW: afpd: afpd.conf, allow line continuation with
- NEW: afpd: AppleVolumes.default allow line continuation with
- NEW: afpd: Mac greek encoding.
- NEW: afpd: CJK encoding.
- UPD: afpd: Default UAMs: DHX + DHX2
- FIX: afpd: return the right error in createfile and copyfile if the disk
- is full.
- FIX: afpd: resolveid return the same error code than OSX if its a directory
- FIX: afpd: server name check, test for the whole loopback subnet
- not only 127.0.0.1.
- UPD: afpd: limit comments size to 128 bytes, (workaround for Adobe CS2 bug).
- UPD: afpd: no more daemon icon.
- UPD: usedots, return an invalid name only for .Applexxx files used by netatalk not
- all files starting with .apple.
- UPD: cnid: increase the number of cnid_dbd slots to 512.
- FIX: cnid: dbd detach the daemon from the control terminal.
- UPD: cnid: never ending Berkeley API changes...
- UPD: cnid: dbd add a timeout when reading data from afpd client.
- UPD: cnid: Dont wait five second after the first error when speaking to the dbd
- backend.
- FIX: papd: vars use % not $
- FIX: papd: quote chars in popen variables expansion. security fix.
- FIX: papd: papd -d didnt write to stderr.
- FIX: papd: ps comments dont always use ()
- FIX: many compilation errors (solaris, AFS, Tru64, xfs quota...).