Painfully slow internet on my macbook but not on other connected computers

alecleach · 11-13-2012, 04:57 AM

Hi there,

I am getting occassionally awful slow internet on my Macbook Pro running Lion (despite my iPhone, housemate's Macbook and housemate's laptop running fine) - uploading files and sending emails with attachments are particularly slow. I get a fast connection at most times, with slow uploads, but occassionally this slows down to a crawl and files time out before I can upload or send them. This is particularly frustrating as I know my housemates connections are fine!

We are with Orange at the moment (using a brightbox router) but I have had similar problems with BT.

Does anyone have any idea why this might be? Thank you!

agentx · 11-13-2012, 09:30 AM

Try and set a new Location for your connection in Network prefs.
Manually set your DNS server address's or use google DNS as a test 8.8.8.8 and 8.8.4.4

You have not told us what OS you are running or if you are wired/wireless etc.(i presume wifi)
What security is set on router should be WPA2-PSk ideally.

trevor · 11-13-2012, 10:10 AM

Also, if agentx's advice doesn't help, change the MTU to 1492. This is done in System Preferences > Network somewhere, but since we don't know whether you're using ethernet or Airport, I can't give you exact directions on where to change it.

Trevor

agentx · 11-13-2012, 11:18 AM

I would not change MTU on your network interface those notes are for setting up Third party routers ADSL WAN side not your internal network adapter.

The MTU for internal routing should be 1500 and you should not have to change this on 99.99% of modern networks.

Just for reference if you want to manually set your DNS server to Orange DNS they are
193.36.79.101
193.36.79.100

alecleach · 11-21-2012, 01:35 PM

hi there guys, apologies for the very late response. changed the DNS as suggested and we're all good! thank you very much

11-13-2012, 04:57 AM	#1
alecleach Prospect Join Date: Jul 2007 Posts: 14	Painfully slow internet on my macbook but not on other connected computers Hi there, I am getting occassionally awful slow internet on my Macbook Pro running Lion (despite my iPhone, housemate's Macbook and housemate's laptop running fine) - uploading files and sending emails with attachments are particularly slow. I get a fast connection at most times, with slow uploads, but occassionally this slows down to a crawl and files time out before I can upload or send them. This is particularly frustrating as I know my housemates connections are fine! We are with Orange at the moment (using a brightbox router) but I have had similar problems with BT. Does anyone have any idea why this might be? Thank you!

11-13-2012, 10:10 AM	#3
trevor Moderator Join Date: Jun 2003 Location: Boulder, CO USA Posts: 19,550	Also, if agentx's advice doesn't help, change the MTU to 1492. This is done in System Preferences > Network somewhere, but since we don't know whether you're using ethernet or Airport, I can't give you exact directions on where to change it. Trevor __________________ How to ask questions the smart way

11-13-2012, 11:18 AM	#4
agentx Hall of Famer Join Date: Feb 2003 Location: Brighton, UK Posts: 3,809	I would not change MTU on your network interface those notes are for setting up Third party routers ADSL WAN side not your internal network adapter. The MTU for internal routing should be 1500 and you should not have to change this on 99.99% of modern networks. Just for reference if you want to manually set your DNS server to Orange DNS they are 193.36.79.101 193.36.79.100 Last edited by agentx; 11-13-2012 at 12:12 PM.

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11-13-2012, 09:30 AM	#2
agentx Hall of Famer Join Date: Feb 2003 Location: Brighton, UK Posts: 3,809	Try and set a new Location for your connection in Network prefs. Manually set your DNS server address's or use google DNS as a test 8.8.8.8 and 8.8.4.4 You have not told us what OS you are running or if you are wired/wireless etc.(i presume wifi) What security is set on router should be WPA2-PSk ideally.

11-21-2012, 01:35 PM	#5
alecleach Prospect Join Date: Jul 2007 Posts: 14	hi there guys, apologies for the very late response. changed the DNS as suggested and we're all good! thank you very much