[quote]maximum transmission unit (MTU) of a communications protocol of a layer is the size (in bytes) of the largest protocol data unit that the layer can pass onwards. MTU parameters usually appear in association with a communications interface (NIC, serial port, etc.). Standards (Ethernet, for example) can fix the size of an MTU; or systems (such as point-to-point serial links) may decide MTU at connect time. A larger MTU brings greater efficiency because each network packet carries more user data while protocol overheads, such as headers or underlying per-packet delays, remain fixed; the resulting higher efficiency means an improvement in bulk protocol throughput. A larger MTU also means processing of fewer packets for the same amount of data. In some systems, per-packet-processing can be a critical performance limitation. However, this gain is not without a downside. Large packets occupy a slow link for more time than a smaller packet, causing greater delays to subsequent packets, and increasing lag and minimum latency. For example, a 1500-byte packet, the largest allowed by Ethernet at the network layer (and hence over most of the Internet), ties up a 14.4k modem for about one second. Large packets are also problematic in the presence of communications errors. Corruption of a single bit in a packet requires that the entire packet be retransmitted. At a given bit error rate, larger packets are more likely to be corrupt. Their greater payload makes retransmissions of larger packets take longer. Despite the negative effects on retransmission duration, large packets can still have a net positive effect on end-to-end TCP performance.[/quote] Changing you'r MTU to 147# is not causing any issues with psn. It can't and won't be classed a ddos as you're not sending multiple login requests repetedly in fast succession, your just changing the maximum amount of data you're sending to Sony in 1 go, making it easier for Sonys anti ddos to recognise you'r system is legitimate and not a jabbering netbot trying to spam it's servers. Get educated.

Someone enlighten me on what exactly this setting is

IT WORKS! Had to combine it with googles dns but disregard what the idoit above said bc it works. Googles dns is 8.8.8.8 & 8.8.4.4 if you didnt have luck with either one try them both.

Thank you!! They are DDoSing it, the fact that it's out there and people want in so badly they are doing it. Sooner you stop the sooner things will go smoother.

If you don't actually KNOW what this setting is, you're probably being an idiot changing it... Patience idiots, patience

[quote]Setting your MTU lower means your console sends out smaller pieces of data more frequently. By everyone doing this you are flooding PSN with traffic and contributing to a DDoS without even realizing it. [b]PSN Status is, as of 11:41 AM EST, now offline yet again and probably because of this MTU nonsense.[/b][/quote]

Isnt 1473 actually more than most people get by default, resulting in less packages (assuming they don't cap below it) The few times I've seen people post screenshots of their network settngs they've been in the 1420-1430 range. I believe I was at 1486 the last time I checked (Xbone)

The thing is the MTU fix actually works. I have no idea what Sony did to the PSN, but I cannot sign in unless I set my MTU to 1473. If I change it back to Auto I get the NW-31194-8 error. Change it back to 1473 and I can log in. I switched it back and forth 4 times and the results are 100% reproducible. With the change I can log in, without it I can't. There's speculation that Sony put some kind of anti-DDOS filtering in and didn't do it correctly which is causing this problem. Until Sony fixes that, changing the MTU is the only solution. Since Sony is reporting that the PSN is fully up now and I still can't log in without changing the MTU, I don't think they are going to fix that.

This is a destiny forum not Sony. Stfu.