503 error on eBay and a few other websites

[formidible]

I have for past few days getting a 503 error message when tryiong to access eBay in the UK and also http://www.download.com This error message insists on occuring, even though these websites are not down and are full accessible from Chrome and other browsers. What's going on?

[mapx]

are you using some proxy ?

check your security software (firewall other than windows one, antivirus with web shields) and permit iron to do its job
you can disable your security software to test if something changes (keep ON only your windows firewall)

also, read
https://support.google.com/postini/answer/136607