Error 3253 when downloading anything

I am also having this problem. Started a couple weeks ago. Nothing changed. Everything is up to date with iTunes and everythin else on my Mac Pro. 😟

After the ATV1 failure at Easter, I now have the same problem as described herein. However, I have the problem only with movie rentals. I need at least 15 times to resume the download so I can watch a movie.

this is happening to me too. I downloaded a movie just fine 1-2 weeks ago but now I keep getting this -3253 error and "connection was reset" message. I am chatting with iTunes support now. We shall see...

Can you let us know if they suggest anything? This just started about two weeks ago for me. Comcast in Northern Virginia. DNS, no simultaneous downloads - nothing fixes it.

I don't know what your bandwidth is, however, I have found out through reading fine print that hight bandwidth users are being throttled by itunes. I have 300meg service from ATT in Austin. Also, you are are using network drives for your library, the throttling can also be effecting it.

Same problem here. This actions didn't help:

- Changing DNS on Router (Fritzbox 7390) to OpenDNS Servers

- flushing DNS cache

- reducing CRC errors on Router (lower speed)

Jus answering to get current state of the problem. Seems to be a bug on current iTunes Version to me.

No, I'm running two different versions of iTunes on two different Macs. It's not just with the current version.

I worked with Apple Support for a couple hours Saturday but nothing they suggested helped. (They had me reset the computer & internet connection and later re-install iTunes, although I already had the latest version.) They were pretty sure re-installing iTunes would fix it but nope. This is on our iMac, 2012 version. I have a phone call with a "senior" support person this afternoon and will post here if anything changes. Our iMac is up to date with software updates as well. We have Comcast in Nor Cal and I did a speed test which didn't show any issues. I kinda wonder though if this is similar to the Comast forcing Netflix to pay for faster service; although it seems to be happening with other ISPs as well.

By the way, I'm expiriencing some hash-mismatch errors in the appstore, too. First error messages are from April 19th:

HashedDownloadProvider: Hash mismatch (86ec178ad49410e09b3842728c691858 should be c3ab7698e430920b1f19703cf801c39d)

and

SStoreURLOperation: Waiting a bit before retry #1 after a network failure

Never seen this messages before. I don' have any problems in other Applications.

I've tried possible fixes with not allowing simultaneous downloads, restarting router (I'm already running the latest versions of iTunes) with no improvement. My problem, like many others, started about 3 weeks ago. Downloads on my computer of TV shows causes me to have to babysit the download because it will stop about 5 to 8 times a 40-something minute dowload with the same 5253 error message. I have never had this problem before and didn't change anything on my end. I have Comcast with Blast, good connection and have no problem downloading elsewhere. I'm not savvy enough to mess with DNS and don't see why I'd have to -- if I have to, I need to switch to something where I don't need to know so much. I have a standard setup. Is this a bug that Apple will fix in the next iTunes update? Is it even acknowledged? I searched in the FAQs in iTunes support, but there is no reference to the 5253 error.

Same rubbish here - Using a pfsense firewall with port 5223 open for itunes on my mac - Everything stops with error 3253 but at different points of the download. 2 different location and setups. Need this to start working again.

This fixed my problem, got to system settings under network click the advanced tab. Click the harware tab and make the following changes set configure to "manual" then under speed select the speed of your network "100 or 1000". Now here is where I think the problem is at least on the 1000baseT networks set duplex to "full duplex" I think the problem is in the "flow control" option. Im guessing it causes unwanted latency with the packets. Then for good measure I set the MTU to "1492". After the changes I was able to download a 4GB movie with no error. Some netork info, my router is an airport express with three netgear gigabit switches. A seagate central network drive, imac mini.

My settings are like your and I had no such luck. I am set for 1000, however the iTunes download seems to reset every 100 meg or so. I wonder if it is because I moved my library to a network drive versus being attached to computer...

Changing the connection settings doesn't help. This is something that began appearing about a month ago, and absolutely nothing anyone does on the user end has been shown to consistently resolve it.

It's also not an ISP problem, since I've seen it reported on Comcast, I'm on Suddenlink myself, and I know it's happening in the UK and Germany too.

The fault is with Apple, and they bloody well need to fix it. Contact their tech support and hammer at them until they get their crap in one coil. (Do not let them convince you to reinstall anything, set up a guest account, reset your computer or anything else, because it is all a waste of time.) Pressure from customers is the only way this will be resolved.

You can add Canada to your list. Will take your advice & contact Apple though, it's not like this stuff is free.