Guest Users & file Sharing

Need help with this one.
I have a new Connect Pro 7 server and i need to be able to configure it as follows if it is at all possible:
most users who use the meeting rooms will be guests
guests need to be able to upload documents from their computer to the "share pod", specifically PPT documents
all guests need to be able to see this
all guests need to have voice capability
Is this even possible?
I keep on hitting a wall on the configuration. I was able to go in as the administrator and set "auto promote participants to presenters" and that seems to allow all guests to have voice capability, but i still cant figure out how to allow them to upload documents to either the "file share" or the "share" pod
Any ideas will be greatly appreciated.

AirPort Utility 5.6 for Mac OS X Lion

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New to the Apple and I want to set up a user account that will not delete the guest users files and allow and preserve their personal settings after log out. Is this possible?

New to the Apple and I want to set up a user account that will not delete the guest users files and allow and preserve their personal settings after log out. Is this possible?

The built-in guest user account will not do this. Simply create a new standard account and call it "Guest" or "Guest Users" or whatever you like.
Go to System Preferences > Users& Groups, click "+" to make a new account.

Domain users files sharing permission problem

Dear Domain Professional,
We have a three domain controllers 192.168.92 .162,167,150 All domain controller working with
Global Catalog servers ( Root forest ) . All domain controller live synchronize with each others like Users , Group policy , ADS, DNS.
lastnight we had a problem with file sharing permission . it had been asked username & password . why this problem was happened ?
Finally we had restated with all domain controller then file sharing perfectly working fine .i had verified all events in domain controller there is no any error issue .
Note:- we are using juniper firewall is there any security issue ?
happended
Regards
Subash

Hi,
According to the
repadmin results, there isn’t any replication issue.
I was wondering how long did the issue last until reboots of DCs?
If the period is short, then this behavior is normal, because AD replication takes time, this issue could occur before AD replication has completed.
Another possible cause is related to Kerberos authentication and authorization mechanism.
During a logon session, once a user has been authenticated successfully, it gets an
access token containing its SID and group membership and privileges.
The user's access token is subsequently inherited by any application process that the user starts during the logon session.
If we change user’s group membership and privileges
after the access token has been issued, the changes won’t be updated until this user logs off and logs on again.
Here are some related articles below for your references:
How Access Tokens Work
http://technet.microsoft.com/en-us/library/cc783557(v=WS.10).aspx
How the Kerberos Version 5 Authentication Protocol Works
http://technet.microsoft.com/en-us/library/cc772815(v=ws.10).aspx
I hope this helps.
Amy

Guest user file lost

Hi,
I am a new mac user here.
I created a guest user account.
after i reboot, my downloaded file all missing or lost.
Is that anyway I can get back those files?
If anyone knew the solution please reply me ASAP.
THanks. Appreciate it.

As Linc points out, the guest user account does not have a long-term file store. Any files are deleted when you log out. That is because the guest account is meant only for temporary use by someone who is not a regular user of the machine and should not be leaving litter to clutter up the hard drive. Don't try to use it for anything more than that in the future.
As to file recovery, see Recovering deleted files.
(Note that my pages contain links to other pages that promote my services, and this should not be taken as an endorsement of my services by Apple.)

File Sharing now working on 10.8

For some reason my 10.8.4 server will not let AD users connect to its shares. I have allowed “Domain Users” in groups to have File sharing and made a share in the file sharing. I have it set to read access for everyone but you still cannot connect as a domain user, it bounces back with a bad password error instead. I can log into the server directly at the login screen with AD users fine too, and the connection to the AD seems to be okay from what I can SEE. Is there anything else I should check?

The new user helped a little but not enough to make the customer happy. I have done a bunch of research over the weekend and I have found there is a little known bug in Apple's ACLs. ACL stands for Access Control List and I have a snippet from a MacFixit that describes the issue:
"A disappointing aspect of Repair Permissions in Leopard is that it does not deal with ACLs (Access Control Lists), a secondary layer of permissions control laid on top of standard Unix permissions, tentatively introduced in Tiger and actually used for the first time in Leopard. Repair Permissions will announce that it is surprised to discover that a certain folder has an unexpected ACL setting, but it won't do anything about it (in other words, it won't repair that kind of permissions)."
Anyway it appears to me that if your privileges get hosed in a computer upgrade the only way to really fix the problem is copy all of your data to a second HD and then break out the install DVDs that came with the Mac Pro and do a fresh install and set the user/file-sharing up manually and then copy your data back to the Mac Pro. I did not connect back to the G4 to get the data again, I just copied my many years of correspondence back to the Mac Pro and this time everything works?
The new user idea did let me manually drop files onto the Mac Pro from connected computers it WOULD NOT let me save files to the Mac Pro from network computers. I usually got a bad path message when I would try and save from Word or TextEdit. I figured I had wasted enough time on this problem and erasing everything and starting over was a better idea.
Thanks everybody.

How to block file transfer and desktop sharing in Lync 2010 for Fedrated and Guest Users

Dear,
Can anybody guide me how to restrict desktop sharing and file transfer for federated and Anonymous logins in Lync 2010.
I have tried to apply this policy through “Conferencing Policy”, but this gets applied to all users including corporate users.
Please help in this.

Hi,
As my knowledge, the CsFileTransferFilterConfiguration and setting in confercing policy are used to block transfer file between users. So if the policy is applied to user, the user would not transfer file with anybody. Since all Federation and Guest
Users access thought the Access Edge service, here is a update that helps to enable the control of the file transfer through the Access Edge service.
http://support.microsoft.com/kb/2621840
The update helps to define the file transfer policy between users on the local area network and users that connect through the Access Edge server in a Microsoft Lync Server 2010 environment. It helps protect Microsoft Lync Server 2010 deployment against
the spread of the most common forms of viruses with minimal degradation to the user experience.
Regards,
Kent Huang
TechNet Community Support ************************************************************************************************************************ Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a
marked post does not actually answer your question.

Can't Enable File Sharing for Guest Users on Time Capsule

Hey all,
My roommate has a time capsule that is capable of using a guest network, which my other roommate and I use to connect to the Internet. I have a Mac Mini, Mac Pro, iPhone, iPad, all of which cannot currently communicate with each other due to being on the "guest network."
I have seen instructions for enabling the "allow guest users to communicate with each other" option, but have loaded the roommate's Airport Utility and it does not have that option. He's running OS X 10.7 and has Airport Utility 6.1. There are options to configure the guest network, but nothing about enabling sharing between computers on the guest network.
See:
http://news.goldenweb.it/article.php?l=en&id=27203&group_dir=comp&grouplist=comp .sys.mac&group=comp.sys.mac.comm
This article seems to suggest the option is not even available anymore, which seems very odd to me. Any ideas? Thank you for your help!

AirPort Utility 5.6 for Mac OS X Lion

XP pro file sharing and guest password - how to enable guest password?

Hi,
I want to share files between two Windows XP pro computers. I would also like that these shares can only be accessed with a password.
Here's a description of my setup:
I have two laptops: over 1 yo Fujitsu-Siemens (FS) running on Windows XP pro (finnish) and a brand new Thinkpad T61 (TP) running on Windows XP pro (english). Both of theses computers have guest account enabled and these accounts have also been password protected. FS's guest account is called "vieras" because of the language settings and TP's guest account is of course just "guest". Guest account passwords have been enabled using "net user <user name> *".
I've disabled simple file sharing on both computers, set shared folder permission to only contain these users: TP - "Guest (TP\Guest)" and FS - "Vieras (FS\Vieras)". Both computers have F-secure on them so I've made firewall rules which enable following services both ways to a specific IP: Ping / ICMP echo request and reply ; Windows file sharing and network printers ; Windows network browsing ; ICMP / Internet Control Message Protocol. I've also enabled these services on Windows firewall.
These computers can connect to each other either via Wi-Fi access point (b-mode) or directly using an ad-hoc Wi-Fi configuration (g-mode). Obviously the latter is used for more bandwidth hungry file transfers. Also, sometimes a cross-over Ethernet cable is used as well for even faster file transfers.
Everything on my setup works just fine except just one thing. I connect to a shared resource by running the computer's IP address. When I connect from TP to FS it prompts for username and password. FS accepts both english and finnish names for the guest account provided that the password is correct. But here's the problem... When connecting from FS to TP _no password or username prompt appears_. If I browse TP's shared folder sessions (under My Computer -> manage) I can see that FS is logged on as "vieras" i.e. FS's guest account.
Since I enabled FS's network shares over a year a go I can't remember everything I did to make it work. Every relevant configuration on TP and FS seem to be identical (e.g. "Security settings -> local policies -> security options -> Accounts: limit local account use of blank passwords to console logon only -> enabled") but still TP accepts connections without password prompt.
I've tried to get TP's password prompts enabled for a while now without any success. I did a lot of searching on the subject but I could only find instructions on how to disable guest account password prompts for network shares.
Has anyone had similar experiences or does anyone know what I should try out next? Thanks...
Solved!
Go to Solution.

Success!
I solved my problem by changing guest account passwords. I tried to keep things simple by using the same guest password on both computers. This however allowed FS to log on to TP without guest password for some unknown reason. My logic would tell me that having the same guest password would allow both computers to log in without password but this wasn't obviously the case. I guess Windows has its own logic that I can't figure out or this issue had something to do with different language setups. Anyhow my shares work now like I want them to work.

HELP - Guest Log In on File Sharing Suddenly Disabled (Grey Out)?

Hello all.
This is my office MacPro, we have a pool of Macs running graphics and also Avid software. We file share with local network through Apple File Sharing.
By default we would be able to turn on our own Mac's file sharing, and other user would log in to our Public folder > Drop Box ... etc
In Leopard, we are able to designate other folder for file share, which I have done. I disabled my default Public folder for file sharing. And created a folder outside my User folder for file sharing, so that others log into my mac as guest user can access it too.
Actually everything is just fine, other mac users just need to log in as Guest to access my share folder.
But this morning, all of a sudden, without any tweaks or anything, other mac users cannot log in as Guest, the Guest option is grey out.
I have tried disabling file share, enable, re-create a new folder to share or re-enable the default Public folder to share, but the Guest option is still grey out.
What could have happen?
Need to solve this as soon as I can, thanks and cheers

Thanks - the weekend was very pleasant indeed!
I agree that something seems to awry in the Leopard MBP. The question is "what". The symptoms now are:
1) iTunes music sharing from MBP is broken
2) Connecting to Panther Mac via AFP is broken (although one Mac can be connected via IP address)
3) Machine works well on a Windows network
Based on all of this, I would guess that there is a problem in the "Bonjour" networking of the MBP. You could try:
1. Using a different account to see if it is local to your user id.
2. Failing that, removing your com.apple.AppleFileServer.plist and com.apple.AppleShareClient.plist files from /Library/Preferences
Outside of that, I would have to do some more digging.

Concern with "File Sharing: On" -- my root user folder (and subfolders) and Macintosh HD is visible

Hi all,
When I set up a File Sharing folder in OSX called "Share", I connected from my PC to my Macbook Pro and not only did I see the "Share" folder but I also could see and have total access to my root user folder (all its subfolders too) and my Macintosh HD (hard disk). Did I miss something? All I did was check mark "File Sharing" in the Sharing option of System Preferences. Then I specifically shared only the "Share" folder that I created on the OSX desktop.
How do I turn of sharing for the root user folder and my Macintosh HD folder?
Many thanks in advance!

Yes, I was logging in from my PC laptop to Mac as the Admin. However, since there is a User called "Everyone" and I, for testing purposes only, turned Read/Write on for "Everyone", I figured I did not have to set up another user (such as "Guest"). I was wrong. Once I created a new user called "Guest" and specifically checked the Guest account in the SMB option, it worked in the restricted mode I was hoping for. Thanks!

I want to transfer a file from a guest user to my owner's user files

I have asked this question a few times today and obviously I have not made my predicament clear.
A guest will record in Microwave-Lite in the Guest account.
I will want to transfer that recording to my owner's account files.
If I am in Guest, how can I get the file into my Owner's files without losing the recording.
One thing I don't understand is how can I do something in Owner when I am in Guest.
Any help will be appreciated. I will need specific instructions for as you can see I have
a lot to learn.
Thanks

Did you try
Quick user swapping >Users & Groups>your admin set this up
>Users & Groups>Guest>allow guest to connect to shared folders
>Sharing>file sharing add to the list

File sharing: possible to warn second user of a file that it is already open?

[I hope this forum is the best place for my question.]
I run a small business: a medical practice. I use a Mac Mini to store all my documents, and we use two iMacs to access the documents through File Sharing. I do not run OSX Lion Server. All machines have OSX 10.7.5.
I have a Numbers spreadsheet on the Mac Mini that is frequently opened and modified by the receptionist on one iMac, but also occasionally opened and modified by the doctor on the other iMac. (The vast majority of other files never need to be opened by more than one user.) Occasionally, the Numbers file will be opened by both users at the same time. If one user modifies the file, when s/he tries to close the file, a dialog pops up warning that there are two versions, and providing the choice to Revert or Duplicate & Save. This means a choice between losing changes, or subsequently checking two documents for differences.
Note that it isn't possible to simply call out, "Hey, have you got that spreadsheet open?" when the doctor is seeing a patient.
Also note that privacy is an issue, as the spreadsheet contains numerous patient names.
Is there a way to: (a) Warn the second user opening the file that it is already open? Or (b) Make the file read-only when a second user tries to open it? (c) Inform the second user that the file is in use, and they can't open it at all. (There may be other solutions that I can't think of.)
I am open to all ideas. I have tried dabbling with AppleScript, but can't find a solution with my emerging AppleScript skills. I have been trying to find out if installing OSX Lion Server on the Mac Mini would help, but I can't find the answer online. (I would have to pay someone to install OSX Lion Server, as I have medical software installed that may or may not fit well with Server.)
Thanks in advance for any help.
Peter

hmm, then would there be any way to reproduce the effect of the 'delete' or 'backspace' keys? If I'm right, I think there was an ASCII code for the backspace character... Would it be possible to insert it to get a character deleted!? :/
I really need to find a way to do all of these operations on a text file because I think it wouldn't be a good idea to completely re-write 30Mb+ large files each time some data has to be modified :P

File sharing with multiple users on one Mac

I have two Macs, both of which ca seen each other across the network. My question regards file sharing with multiple users on the same computer. When file sharing, are the files from all users available across the network, or just those of the user presently logged in? The issue is that I am trying to access files from a user who isn't currently logged in, but another user on that computer is. I need to get into that person's documents, but I don't see a way to navigate to their documents folder.

Right, I got that. But the computer is in constant use by User A, while I need access to User B's files. I could need access at anytime, and it would be a pain to make User A log off and log in as User B everytime. I was just wondering if there is anyway to access User B's files in this situation, without logging User B in.

How can I allow network users to use File Sharing on 10.8 Server?

I am in the process of setting up a new OS X 10.8 Server. I have exported/imported the network users from my previous OS X 10.6.8 Server using Workspace Manager. I have re-entered the passwords of the users. I have existing clients running (stil logged in).
I have set up the File Sharing service in Server.app. I have several mount points. I have made the Users mount point available for home directories over AFP.
Now, the system administrator can connect to the server and get access to the file shares. So the basic file sharing system works.
Also: the users on a client can get there password verified (e.g. when unlocking screen protection) by the server. It is just AFP they can't get access to, while the system administrator account (OD /Local on the server) can be used. So, the password in the server is OK too. It seems to be a matter of privileges.
But no network user (OD user in directory /LDAPv3/127.0.0.1 on the server) can get access. Where can I give network users privileges for File Sharing on the server?
I did try to add either the "Open Directory Users" group or a specific user that was imported into com.apple.access_afp. If I do that, there is partial success. I can connect to the server from the client with a user account other than system administrator from the server (but connecting is slow). But Mobile Home Sync does not work:
1:: [13/04/05 16:11:10.379] Scheduling next sync of "HomeSync_Mirror" at 2013-04-05 14:11:20 +0000
1:: [13/04/05 16:11:20.782] ==========================================================
0:: [13/04/05 16:11:20.782] Starting automatic sync of "HomeSync_Mirror".
1:: [13/04/05 16:11:20.786] Peer "network" reports changes since last sync.
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:alias:]: isRemote = NO
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: peer = <SPeer_FS:0x7fd5a5009520> = local, optionalStoreID = (null), peer.storeIDString = *
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: rootPath        = /Users/gerben
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: storePath       = /Users/gerben/.FileSync/store.filesyncstatetree
1:: [13/04/05 16:11:20.787] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: rootAlias       = {path='/Users/gerben', targetName='gerben', volumeName='Macintosh HD', type=DIR, volumeCreateDate=2010-08-10-12:58:16, targetCreateDate=2011-08-28-18:39:13, parentDirID=37638, nodeID=3003598, filesystemID=0000 ('0000'), signature=0x482b ('H+'), isBootVolume=YES, isAutomounted=NO, isEjectable=NO, hasPersistentFileIDs=YES, mounted=YES, url='file://localhost/'}
0:: [13/04/05 16:11:20.789] -[SPeer_FS _mountServerCallbackShares:status:]: received error 64
0:: [13/04/05 16:11:20.790] EXCEPTION: _mountServerCallbackShares:status: (Host is down) <-[SPeer_FS mountPeerVolumeWithURLString:] (Peer-FS.m:446): "'(-1)' error 64">
0:: [13/04/05 16:11:20.790] USERINFO: {
0:: [13/04/05 16:11:20.790]     NSLocalizedDescription = "Host is down";
0:: [13/04/05 16:11:20.790] }
0:: [13/04/05 16:11:20.790] BACKTRACE: {
0:: [13/04/05 16:11:20.790] ? | 0x105cb79b7
0:: [13/04/05 16:11:20.790] ? | 0x105cbf0e5
0:: [13/04/05 16:11:20.790] ? | 0x105c2c866
0:: [13/04/05 16:11:20.790] ? | 0x105c2babd
0:: [13/04/05 16:11:20.790] ? | 0x105c2acb4
0:: [13/04/05 16:11:20.790] ? | 0x7fff858bb72a
0:: [13/04/05 16:11:20.790] ? | 0x7fff858bb6a2
0:: [13/04/05 16:11:20.790] ? | 0x7fff874cf8bf
0:: [13/04/05 16:11:20.790] ? | 0x7fff874d2b75
0:: [13/04/05 16:11:20.790] }
1:: [13/04/05 16:11:20.790] Peer "network" is unable to sync. (-[SPeer_FS mountPeerVolumeWithURLString:] (Peer-FS.m:446): "'(-1)' error 64")
0:: [13/04/05 16:11:20.790] Peer "network" is unable to sync. Not enough peers will be available to continue syncing.
0:: [13/04/05 16:11:20.790] Aborting sync of "HomeSync_Mirror".
1:: [13/04/05 16:11:20.790] -[SPeer abortSync] "local"
1:: [13/04/05 16:11:20.797] -[SStore_FS setupWithAlias:andRef:] (Store-FS.m:447): unlink('/Users/gerben/.FileSync/.fstemp.QW1Gh-bhvgEhVwmG3.noindex')
0:: [13/04/05 16:11:20.798] EXCEPTION: !IF <-[SPeer(protected) doPrepareForSyncWithResolvedConflicts:] (Peer.m:1149): "'(([self checkAbort]))'">
0:: [13/04/05 16:11:20.798] BACKTRACE: {
0:: [13/04/05 16:11:20.798] ? | 0x105c2bb66
0:: [13/04/05 16:11:20.798] ? | 0x105c2acb4
0:: [13/04/05 16:11:20.798] ? | 0x7fff858bb72a
0:: [13/04/05 16:11:20.798] ? | 0x7fff858bb6a2
0:: [13/04/05 16:11:20.798] ? | 0x7fff874cf8bf
0:: [13/04/05 16:11:20.798] ? | 0x7fff874d2b75
0:: [13/04/05 16:11:20.798] }
1:: [13/04/05 16:11:20.798] -[SStore_FS deleteStateTreeTurdFile] (Store-FS.m:476): unlink('/Users/gerben/.FileSync/store.filesyncstatetree.statetree_dirty')
1:: [13/04/05 16:11:20.798] Peer "local" is unable to sync. (-[SPeer(protected) doPrepareForSyncWithResolvedConflicts:] (Peer.m:1149): "'(([self checkAbort]))'")
0:: [13/04/05 16:11:20.798] Peer "local" is unable to sync. Not enough peers will be available to continue syncing.
1:: [13/04/05 16:11:20.798] EXCEPTION: SFAbortedException <-[SSyncEngine _waitForPeers:] (SyncEngine.m:1922): "'(_abort)'">
1:: [13/04/05 16:11:20.798] -[SSyncEngine threadMain_SyncEngine_sync:]: sync failed with exception "-[SSyncEngine _waitForPeers:] (SyncEngine.m:1922): "'(_abort)'"".
0:: [13/04/05 16:11:21.066] Sync of "HomeSync_Mirror" encountered errors. (_mountServerCallbackShares:status: (Host is down))
0:: [13/04/05 16:11:21.067] Last successful sync completed at 2013-04-04 20:17:15 +0000.
0:: [13/04/05 16:11:21.067] Finished sync of "HomeSync_Mirror".
1:: [13/04/05 16:11:21.067] Scheduling next sync of "HomeSync_Mirror" at 2013-04-05 14:31:21 +0000
1:: [13/04/05 16:11:21.284] 1-pass sync of "HomeSync_Mirror" took 0.02 seconds

Hi Gerben,
Try creating a brand new user, that's not imported and see if that works. Every user/group has a little gear in the Server.app/Users or Groups which allows specific access to specific services, perhaps filesharing is off in that section?
Is your DNS setup properly? Can you verify that clients can see the FQDN of your server?
After setting up the Users folder for mobilehomes, did you check whether the group and the separate users have access to filesharing? I am able to select the correct homefolder /Users and restrict the homefolder size.
Goodluck!
Jeffrey

File sharing across multiple user accounts on the same machine

Hello,
I try to figure out how multiple users (my wife and I) on the same mac can have equal access to files on the local drive without granting that access to all users on that machine or even the rest of the world.
My research sofar hasn't come up with a satisfying solution. Here are the solutions that I am looking at:
1. Enable a permission system that ensures access to both users in all cases (file/directory creation, copy and move).
I only found a suitable solution for creating and copying files/directories but not for moving them.
See the following articles for reference:
https://discussions.apple.com/message/20787617#20787617 Setting up a shared structure that works e.g. for iPhoto Library but not for moving files to and from
https://discussions.apple.com/message/4005647#4005647 Helpful information on POSIX Permissions, ACL's an Permission inheritance
This would be my first choice if I can get around the problem of moving files...
2. Disk Image
Create a disk image which ignores persmissions and set permissions for the file that contains the image instead.
Read this article to get further details: http://support.apple.com/kb/HT1198
This solution will work but has a few disadvatages:
There's no mutual access from multiple user accounts since an image may only be mounted by one user at a time.
One has to create a startup script that mounts the image upon login which would create a first come first serve for access to the image content.
3. Using a file sharing protocol (e.g. afp or smb) locally.
The idea behind it is to have a server providing the files mutually to multiple users one the same machine. At them moment this seems to be the most promising approach to me.
Unfortunately I can get acces from another machine but not from the same machine. Has anyone ever tried to access the file sharing (afp or smb) from the same machine on which the server is located?
Has anyone got some helpful hints for me?
Thanks in advance.

Sorry, but you didn't specify details, and it was worth checking whether or not you had overlooked this approach.
The problem you're having (as I suppose you already know) is that any new disk item inherits the permissions of the folder it is originally created in in. These permissions (sensibly enough) need owner or administrator permission to change once they've been established; that will happen when you copy a file to a new location (because that's essentially creating a new file) but not when you move it. any of the following would work:
changing the permissions on newly created files for both users so that they all explicitly give r/w access to a particular group.
writing a droplet that would change the permissions of files dropped on it and move them programmatically to the shared folder
set up a folder action or launchd job that would watch the shared folder and automatically convert permissions on files placed in it.
The last would be the approach I would take, but... which appeals to you?

Guest Users & file Sharing

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