Efficient (Large) file sharing setup

Hi, I have users that email large Excel files daily and weekly over LAN and WAN and I want to stop this. I'm trying to figure a more user friendly and network/email server friendly way of doing this. I'm not sure would a file server/web setup be the best. Any suggestions?

On your LAN you could run Apple file sharing and samba sharing for your pc users.
Look into sharepoints
Sharing files over the internet needs to be secure so your best only using apple file sharing over a VPN connection.
Other than that you could setup an SFTP server. Create a generic none admin account on a mac designated as the server. Then goto the sharing prefernces and turn on remote login.
Then port forward tcp port 22 from your router to the IP address of that mac. Then any users can access it over the internet or lan using an SFTP client. They login with the generic username and password you created.

Similar Messages

File sharing setup causing static when using Itunes

We have 2 ibook g4's, and use an airport express to play music on our creature speakers. It's worked great up till now. We setup file sharing on both laptops ... and ever since we only get static when we try playing music in itunes.
You can hear the music, but it's very faint under the static
Speakers work fine when used with our dvd player etc
Have turned off file sharing with no change
Rebooted both machines
We both use the latest itunes & osx vers
Any help would be greatly appreciated!!
cheers
FF
ibook g4 Mac OS X (10.4.8)
ibook g4 Mac OS X (10.4.8)

appears itunes is not the culprit, as I've used airtunes with other apps with the same result. will repost this under another category.

(large) file sharing

what is the quickest way to send large (when i say large i mean huge, like 15gb) files?
i am a current college student living halfway across the country from my home. i have set up vnc so that i can access my home computer, but getting files to and from my home computer and here is terrible. there are a few different ways i do it, but nothing seems to be quicker than the other. like right now im trying to get a 14gb .zip file from my home computer to my laptop here.
i am currently using my "Public" folder ('Username' > Public) and am just dragging from public to my downloads folder. which seems to be the fastest way.
i also have 2 skype accounts set up (1 for each computer) so send back and forth.
iChat doesnt seem to like me.
i used to use a program called "Dragster" but that is just as slow and the trial is up.
and i cant use MobileMe (1gb limit) or anything else with a 1gb limit. some of the files in this .zip file are bigger than 1gb, so i cant file split it. split the file and copy/pasting from public is only slower.
any suggestions??

Dropbox has a paid level ($10/mo) for a 50GB limit - you can purchase it for a month, transfer your files, then revert to the free 2GB limit. The bottleneck, as with any file-transfer service, will be the upload (since home internet is usually much faster down than up), but once it's "in the cloud" the download should be a lot faster. You should expect the whole process to take several days, though. As the previous answer said, sometimes sneakernet and snail mail is still faster for these large file transfers.
Matt

Best Setup For Frequent File Sharing On Home Network?

Hi guys,
I'm setting up an office at my house with multiple computers on a network, and we'll be sharing files over the network frequently. My question is, what is the best setup for this?.. Fastest transfer of files, stable wireless connection, etc.
All of the computers will be Macs (iMacs and Macbooks).
We'll be editing videos/photos on the computers. (Potentially large files)
Is the easiest setup just to have the main computer attached to a good router, setup file sharing on all other computers, and just do it that way?
Or would it be better to create some sort of NAS?
Also can someone reccomend a good router for this type of scenario?
Thanks for any help given.

NAS is the right tool for this job.
It is expensive but the market leaders.. synology and QNAP have really been doing it for long time and the ability to do file store/sharing and most importantly backup in these is excellent. Pick the best you can afford.. and buy disks that are in the recommended list. ie the cheapest are not always the best.. indeed they seldom are.
Plan very carefully for rotation of USB drives (easy and cheap now with 4TB single drives). Rotate backups with offsite location on weekly basis.
I would buy a 4 disk case.. you can use 4x3TB which are the best value at the moment.. that gives you 9TB of storage.. plus redundancy for a dead drive.
Alternatives are using a Mac Mini as a server.. with a large stack of disks on it.. generally should be thinking thunderbolt if you want speed. Hideously expensive though for now.
You can buy an Extreme or TC.. either would work well. TC allows you easy TM backups without using your NAS..
Edit very large files on the computer. ie copy to computer.. edit.. copy back to the NAS.
Editing very large files over wireless.. not good. Multiply that by mutliple computers.. not even fair.
Copy a large project to the computer.. work on it.. copy back to the NAS.. in the meantime Time Machine should be able to take care of incremental backups.
There are heaps and heaps of solutions.. as long as it is logical and easy to you.. and covers what you need.
Don't skimp.. spending a $1000 for a NAS with disks.. plus extra for the backup disks.. that represents how many day's work for you plus anyone you have helping.. $$$$ ????
A mini as a server is a good alternative.. You don't need to run server OS.. but share files to the network. Very hard to build the capacity of the NAS though.
And a Mac Pro is now a joke without internal slots and cages for drives. (nice machine but wrong for this).
And Apple have nothing in between.. a short tower case.. been missing for a long long time.

Sharing large files

Is there a way I could share specific files or folders (but not anything else) with another user from another computer over the internet as opposed to loading something up to a server or emailing something? If it is possible, how do I set it up and how do someone access it?
Thanks in advance.
Fridge

This depends a lot on the kind of network connectivity you have on your Mac and the other person has, and what you mean by "large."
If the file truly is large, such as a few gigabytes, sharing it from a Mac on a typical home network can be done, but it would take hours (and maybe days) for the other person to download it.
The idea though is to enable file sharing on your local Mac, open up port 80 on your Mac and firewall, create a guest account on your Mac, then gie access to your friend. Your friend would connect either via ssh or Apple file share.
If you provide more details about what kind of network your friend and you have and how large a file you have in mind, more suggestions can no doubt be provided here.

I want to share files from iMac to MacBookPro. In "Sharing" setup I want to check "screen Sharing" but get the error message"Screen Sharing is currently being controlled by the Remote Management service." What do I need to FIX???

I want to share files from iMac to MacBookPro. In "Sharing" setup I want to check "screen Sharing" but get the error message"Screen Sharing is currently being controlled by the Remote Management service." What do I need to FIX???

Care to share which OS you are using?
Have you read for possible solutions over in the "More Like This" thread over here?----------------------->

Why can't there be a simple program to setup remote file sharing?

If someone wants to take a crack at getting my Time Capsule available remotely (off network over internet), I would appreciate it.
I am a graphic designer and use the other side of my brain. DNS, static IP, MAC address etc is very confusing.
I purchased a neat little app called Connect360 for Mac that automatically configures music/video sharing to Xbox360 from MacBook Pro. Evrything is automatic. Brilliant. If someone could do that to configure internet file sharing, it would be worth $$$$$$.
Thanks

You cannot do a simple program with the multiplicity of internet connections, modem type, ISP types, authentication types. Also you notice that Apple decided everything should now happen from the cloud, so cancelled the mobileme service which did offer easier setup for something that is far more limited, at least for now.
Also please note there are fridge mechanics who fix fridges and car mechanics who fix cars. Photographers who make a living taking better photos than I can, and computer technicians who do network setups. If you don't fix your car or the washing machine.. why do you need to fix your internet networking?? Pay someone to do it.. but Steve said computers are easy and you got a false impression that everything should just plug together and work.. well it doesn't. Find a tame Computer tech and let him/her carry that part of your business. Spend your time doing what earns you money instead of in frustration at fixing the fridge. (Being symbolic of the computer network).
It is rather like when I (a computer technician) dabble in graphic design.. I do, and you laugh at the results.. !!
Please note I no longer work in that field because the pay is miserable, the customers ring up day and night and scream at you that the network is down and it is all your fault, and want you to spend an hour on the phone helping them. No service fee of course. You should on the basis of a single job, help connect their computer to the printer over the phone for an hour, rather than pay you a service call. Since computers are easy and you should just donate your time and life really to helping them do what Steve and Bill said was so easy.

How do you setup file sharing between users on the same computer? How do they view the shared files?

I have 10.6.8 software loaded on my Mac Pro. My family uses it as our primary computer, it is basically my wife and I . I set up a third account for my 2 1/2 year old daughter since there is a crap load of software programs for her games and what nots. I want to be able to share all the files between all three accounts on the computer. I do see under System Preferences how to do file sharing, however when I do I can not find where to view the files I have shared. I have tried sharing the entire hard drive and desktop along with specific folders. Thanks

Tempeleton Peck
I understand how to do that, I was looking to share all fodlers or a bunch of folders. I found out how to do it.
Paul

File sharing between Mac Mini and iMac "breaks" after reboot of either device, and won't restore. Why? Running Maverick 10.9.1 on both. File sharing is setup on both. Help.

I'm a new user - recent convert from longtime Windows to Apple. Thought having desktops and computing aligned with phones and tablets would help. Not so far.
I have a MacMini running Mavericks 10.9.1, and an iMac running Mavericks 10.9.1. File Sharing is set up on both. If either device is rebooted for any reason, file sharing from the Mac Mini to the iMac "breaks" and will not easily restart. Various things eventually brings the connection back - usually having to do with checking and unchecking File Sharing, the AFP button, and/or the SMB button on the iMac - but never the same procedure twice in a row. File Sharing from the iMac to the Mac Mini is never disrupted - always comes back up without a problem. Screen Sharing also works between both without fail, and comes up after reboot of either. No problem there. Only difficulty is from Mac Mini to the iMac.
Why? Any ideas?

Should also clarify - usually takes multiple hours of checking/unchecking file sharing settings in order to restore the share between Mac Mini and iMac. NEVER happens automatically.
This is disruptive because I've got the Mac Mini pointing to several file locations on the iMac for various things - photos, music, etc. - and they all hang up unless the share is restored. Real bummer.

Not just another file sharing thread......

Running a forum search gives me a plethora of file sharing threads. Most of these threads are a one answer type of question or a simple "Preferences>Sharing>File Sharing type of answer. I am no expert here, I learn something every time I visit, but I know the basics of file sharing after nearly 20 years of using macs. I have a network set up at my business and home that the computers share and am perfectly comfortable with the basics. I would really like a discussion about more creative options available to expand what I am currently using.
We have four macbook pros here. Two are personal only and the other two are business/personal. The two business MBP's are the ones we use the most, they are the primary machines which go from work to home. Right now they share files but up until now have really been set up for their own workstations for 2 different jobs. Now, we are starting to blend a little bit more of our work and we have had the need to share more files with the 2 computers. It's gotten to a point where basic file sharing isn't enough. The problem I am having is that both computers aren't always within airport range of each other, and both computers aren't always on or awake. So, it's become annoying to have to make sure the machine with the files I need is awake and nearby. So, we have recently started using dropbox to share files that way. The only issue with that is that many of our files are sensitive in nature and security is a bit of a risk. So, I am encrypting volumes with PGP and sharing the encrypted volumes via dropbox. So far it's not been an issue with having the same files open at the same time on both computers to avoid conflicts, I think we'll be ok for awhile. But as this data collection grows, I think it will become impractical. The thing I really like about using dropbox is that both computers don't need to be running at the same time since the files are stored locally and the changes are synced online. Even if I am traveling with one computer, I will usually have an internet connection so the files will update on my partner's computer when I make changes. This is the ultimate in portability and syncing. But like I said, it may become impractical when we put 30-40 Gigs of data up and we can't so easily keep track of what's open on which computer.
So, I would like to know what others do at work or home to share necessary files between multiple computers, other than typical OS X file sharing techniques. I know some applications have a checkout type of feature which might help for certain types of files, but I really want a simple universal setup that my partners and employees can learn without having to think about what type of file they are working with. I have quite a bit of server space I can use for storage of files online if it would help, but syncing would be an issue.
Dropbox may just be the best option for me to share and sync from multiple locations. It makes sense! I just hope some users here have some other recommendations that might work!

Allan Eckert wrote:
As to the PGP questions, as long as you have a file from the DropBox attached and are doing updates they are being sent to the copy on the DropBox. The updates are not all held until you unmount it.
Actually, I'm seeing otherwise. I just ran a test to be sure. I held a pgp disk open for about 5 minutes while copying files to and removing from it. I watched the dropbox folder and the upload activity the whole time and saw no activity or change. The moment I ejected the volume, network activity jumped up and the folder icon in my dropbox turned from synced to syncing in progress. It actually seems to work quite well. The problem I have with it is that if I need to use large files, it will take a long time to upload, because doesn't the whole encrypted volume need to be uploaded again for any minor changes? I haven't tested anything larger than about 20MB, so it's hard to tell.
The drop copy application might actually be quite useful if I were running a file server. I would certainly need an easy to use interface for the actual sharing of the files. If I do go that route, I would prefer for the ability to be able to lock files. As Allan said, drop copy doesn't have that feature, unfortunately.
So, there really isn't a well known solution for this type of application, huh? I may just have to reorganize my plan and stick to removable media for the shared data. If there is only one copy, it can't get mixed up. The only issue I have is when I'm not on premises, how do I share the data with the office? I suppose I will just have to have a better handle on what I need and make sure to have it with me and use dropbox or ftp to upload the files back and forth from office to user.
I just did a test with a decent size PGP virtual disk (125MB) I added one small 3MB jpg file to it and it did an incremental update to sync the file very quickly. I don't know how it's able to do it, but it's doing it. I would have thought it would have to update the whole disk every time, but I guess not. Maybe PGP and dropbox is a better solution that I ever imagined it to be.
Message was edited by: sterlingfive
Message was edited by: sterlingfive

File Sharing in virtualbox using NAT

I have Win2K installed as a guest machine in virtualbox. I have no problems accessing the Internet using NAT with the NIC set to DHCP.
Will I be able to access the Arch host (and vice-versa) using NAT networking or will I have to setup bridge-networking? I know there is a wiki on virtualbox, but it didn't seem to cover this other than giving more detailed instructions on bridge-networking. At this point I only want to know if file sharing is possible using NAT before spending too much time on it. If its not possible I may go back to VMware-server which seemed to get broken after the last kernel upgrade.
Thanks

Although you have allowed open access to all users to save files in that directory, it's a pointless excersise as you have no system in place to allow one user to overwrite another users files. There's more to multiuser file access than simply making a place where you can all save files. Files created by each user have a unique user ID attached, and without a Group system in place for your users, OSX will (correctly) deny overwrites. You're going to need to learn about the unix filesystem and the chgrp function, and establish your users as being members of a Group before they can all overwrite each others files. It's much too large a topic to get into here, but a spot of research will sort you out. A word of caution though - filelocking is not a trivial subject and you probably want to consider other options - what happens if someone screws up a project and overwrites it 'behind the back' of another user?

Lion Server File Sharing Crashes

We have a brand new Mac Pro (12 core with 64GB of RAM) running OS X Lion Server in a corporate environment. The server is running only file sharing and software update servers, and we have around 40 users who need to be connected over AFP at all times. This company runs 24/7 and we have an XSan environment using an ATTO Celerity 8GB 4 channel fiber card (84EN) along with a 6 port 10GB Ethernet card. The Ethernet card is configured in a link aggregation bond using ports 1-4. The idea is that clients who do not have fiber cards installed on their machines can still connect to the SAN via Ethernet and this file server. They AFP connect to the share, and of course the share is the SAN. It's a single mount point and everyone has read/write access.
The issue is that this machine keeps crashing (multiple times per day) and I cannot find any reason why. Syslog shows nothing of value and I've called into Apple Enterprise Support who also brought nothing to the table.
We initially had SMB and AFP file sharing activated but as soon as a Windows 7 client connected the machine was brought down. So, I disabled SMB via terminal (sudo serveradmin stop smb) and deactivated it via the Server app for the share point). That at least allows the machine to be up for 4-6 hours before crashing again.
This is seemingly the simplest of setups for file sharing and I would've thought that this beast of a machine would be able to handle being a file server without issue for far more than 40 clients. I'm seeing high CPU usage, which Apple support told me was perfectly normal (around 60% on the kernel_task process and around 55% on the AppleFileServer process). It also seems to consume all 64GB of memory, though it shows 60GB as inactive, but at the same time it's paging in and out.
Virtually all of the clients are running Lion (10.7.4), the server itself is running 10.7.4. There are a few ethernet connected clients running 10.6 along with two running 10.5. As I mentioned I disabled SMB so there are no Windows computers connecting to this machine at this time (though it would be nice to get that functionality back if AFP can be stabilized).
None of this makes any sense to me and I'm hoping someone can shed some light on this issue. This company simply cannot be down, especially not multiple times per day. The only way to bring things back and running from a crash is to hard boot the machine via the power button as you cannot perform a restart or a shutdown. Once the machine comes back up everything is back to working order for a few more hours until it happens again.

All the memory is fine. The server rarely if ever goes down when there are only around 10-12 users connected. When there are 20+ users connected and working heavily it goes down often. When I say working heavily, I mean they are transferring huge files to the SAN (100GB+), sometimes 5 at a time per user, and there are a bunch of others who are reading large video files at a minimum of 220MB/sec from the SAN.
Though this worked on Snow Leopard without any issues, Lion just doesn't seem to be able to handle it. The odd thing is, on Snow Leopard there was only a single 1GB ethernet connection to a NAS system, whereas with Lion we have a much more powerful machine with a 6-port 10GB ethernet card and a 4 lane 8GB fiber card to a true SAN. You would think that the newer scenario with Lion would handle far more users with ease.
So far, very disappointing with regards to Lion's file serving performance.

How to optimize Mac file sharing speeds over LAN?

I got a new NetGear R7000, and I find it very fast for LAN transfers wired or wireless between Macs running OS X Mountain Lion or Mavericks. Testing large (multigigabyte) file transfers over AFP, an early 2011 Macbook Pro running Mavericks 10.9.1 connecting to a 2011 Mac Mini running Mountain Lion 10.8.5, Ethernet speeds can hit 6 GB per min (800 Mbps) real world and wireless 2.06 GB / min (273 Mbps), real world performance.
If I perform a similar test for Snow Leopard on both ends, an early 2011 Macbook Pro running Snow Leopard 10.6.8 onnecting to a 2010 Mac Mini also running 10.6.8, has Ethernet transfers topping out at about 1.72 Gigabytes per minute for Ethernet (228 Mbps) and 1.07 GB / min (140 Mbps) for Wifi, real world performance.
I am wondering if there is anything I can do to speed up the Snow Leopard AFP networking. (There are some applications that run only in Snow Leopard and I would like to have it network efficiently instead of getting rid of it. The Macbook Pro has a partitioned drive so I can boot between Snow Leopard and Mavericks.)
I know that Apple made some tweaks in file sharing performance in Mountain Lion 10.8.5, and I suspect TCP IP parameters were altered to speed things up dramatically when there were all the complaints about it being slow on Mac Book Airs with 802.11ac. I am curious what Apple did.
I am wondering if anyone has any tips on how I can improve AFP file sharing performance in Snow Leopard. Are there TCP IP parameters, or plist entries, or other hidden settings I can change? Parameters I can tune in sysctl.conf? I am hoping a real network guru can come on here to advise on some advanced techniques I can use to speed up AFP on Snow Leopard. It is the Macs running Snow Leopard that need to be tuned, not the router, as speeds are very fast sharing between Mountain Lion and Mavericks.
Also, for any/all Mac OS versions, are there networking parameters that I can tune to speed up transfers that involve a very large number of very small files? Even recent versions of OS X slow down greatly on this.
Thanks in advance

Anyone have any ideas? What kind of speed do others see through gigabit Ethernet, with snow leopard or Lion?

Slow files sharing, Slow files sharing

Hi there
I have many problems sharing files in the Internet
When I am connected in the same router with my mini Mac lion server and my air Mac, they share the files very good, but when I am outside from another net, it connects but very slow.
Is any extra configuration I need to perform?
Also I can't connect my WebDAV folder in my iPad with the server
What I need to config so it connects?
Thanks
Andres

OS X has two (2) protocols that are primarily used for sharing files.
1. Server Message Block, or SMB. This is primarily for sharing with Windows users.
2. Apple File Protocol, or AFP. This is primarily for sharing with OS X users.
Some ISPs will block SMB traffic. AFP traffic is not usually blocked, however for large files over the Internet it can be problematic. FTP is more efficient in those situations.
Having said that, I do not think your file sharing protocol is the problem. I think it is your server's upload speed. If the Internet at your server has an upload (to the Internet) speed of 0.4Mbps, that would appear as about 45KB/s in Finder windows when transferring files. That is slow. The limiting factor when accessing files on the server is the server's upload speed.
If the Internet connection at your outside location has an upload (to the Internet) speed of 1Mbps, then the limiting factor to sending files back to the server is your upload speed. Upload speeds are usually the limiting factor, however your upload speeds are so low that you cannot expect good performance. I would say you need upload speeds of at least 5Mbps.
Also try pinging your remote server, provided there is no firewall blocking pings. If you see high latency in the ping times, or if pings are being dropped, that would affect performance as well.

Remote file sharing

I am currently in USA and am trying to connect to my mac in UK to get a large file. I have followed the support page instructions but have been unable to connect. Any suggestions.

Hi - that really depends on your son's router. Every router that I know of has a webpage to do configuration stuff. Your son would access it by typing something like http://192.168.0.1 in Safari. If he looks in his System Preferences Network TCP/IP stuff, the IP address of the router as listed there is what he needs to use in place of my 192.168.0.1 example.
Once there, there are one, maybe three, things that he will probably have to do.
Step 1: First, he'll need to turn on file sharing in his Mac as discussed in my previous post. Then, he'll have to navigate his way to a "port forwarding" configuration webpage on his router. On my ActionTec all-in-one combo DSL modem + wired&wireless access point + router, I go into "Advanced Settings" then there is a link to "port forwarding." Once there, you would enter a port range of 548 to 548, protocol is TCP, and your son's computer's name or its intranet (192.168.x.x or 10.x.x.x) IP address. Save changes and reboot router.
If it doesn't let him do that, it may be because the router doesn't track computers on its LAN by their ethernet port's or Airport wireless' MAC address, but rather by IP address, so it will only let him forward ports to machines that don't have a dynamically assigned IP address by the router. If that's the case, on to step 2:
Step 2: there should be a link in the advanced setup junk for DHCP Server in one of the router's configuration webpages. He should be able to set a range of DHCP-assigned IP addresses. Does this range of numbers run the whole gamut of the whole subnet? That is to say, if the subnet mask is 255.255.255.0, does the beginning and ending IP addresses run from, say, 192.168.0.2 to 192.168.0.254? If so, restrict the range to something smaller, like 192.168.0.101 to 192.168.0.254. Note: Don't mess with the first three numbers if his are different than my example here, i.e., the 192.168.0 part, only change the last number. I will continue to use the 192.168.0 in my examples, for example only. Leave the subnet alone. Once he's made this change, save changes and reboot router.
In his Mac's System Preferences Network TCP/IP, choose "Using DHCP with manual address" and manually enter an IP address for his Mac. Using my example, choose something between 192.168.0.2 and 192.168.0.100, i.e., something outside the DHCP assigned address range (BTW, x.x.x.254 is as big as the numbers can be, so he needs to pick something less than that x.x.x.101 number). Then apply the change.
If we even had to do step 2, we're getting close to finishing up now. Time for Step 3.
Step 3: Go back into the router's "port forwarding" configuration webpage. Now that he has a range of static IP addresses available (static are 192.168.0.2 - 192.168.0.100 since he specified the range of dynamic addresses to be 192.168.101 -192.168.0.254), he should be able to do Step 1 now.
Post file retrieval: Once you have successfully retrieved the file, your son needs to go back into the port forwarding configuration webpage and delete that port forward. People might disagree with me on this, but it is my understanding that AFP file transfers are not encrypted, so however unlikely, a sniffer at the right place at the right time could have intercepted your username and password and could then have AFP upload and download privileges with your son's computer. Or hack his way in via that open port and do other nasty stuff to him or to others, using his computer to do it. That's why I tunnel my AFP stuff through secure shell, in order to encrypt the username/password, and data transfer, but if you're not comfortable with Terminal.app, it might be perceived to be a bit daunting to set up.
Once the port forward is deleted, have him save changes in his router and reboot router. And your son should go back into his Mac's System Preferences Network TCP/IP, and choose "Using DHCP" (no longer with manual address) and apply changes. Also, he'll need to pay a visit to his System Preferences Sharing Services and uncheck the "file sharing" checkbox and make sure the firewall is still ON.
There is no harm in leaving the range of assigned DHCP addresses to be the x.x.x.101 to x.x.x.254 range in the router, unless your son has more than 154 computers and networked peripherals attached to his home LAN. However, if desired, he can go back to the DHCP Server configuration webpage and change it back to the way it was.
Also, I suppose it is possible that every time he reboots his router, that his ISP could conceivably assign him a new public IP address. He'll need to check that out and if it changes on him, he'll need to text IM you with the new public IP address. He can get it from http://whatsmyipaddress.com.
All this having been said, http://portforward.com/cports.htm can provide him with some guidance for forwarding ports on his specific make and model of router (if it is listed), although I don't see anything specific there for forwarding ports for Apple File Protocol, AFP, or port 548. So just pick something like Apple Remote Desktop and follow those general guidelines for your son's specific router, just don't use the port numbers they say, use port 548 for TCP instead.
And lastly, if your son's home network architecture looks like this:
internet<-->modem<--> (non-wireless) router<-->Airport Extreme base station or some other other wireless access point<-->computer,
or like this:
internet<-->modem<--> wired/wireless router<-->computer,
then if the above directions still aren't working for you, we're going to have to dig into likely mismatched configurations between those different devices.
So, did I just make your day or what?

Efficient (Large) file sharing setup

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