Hotmail and Yahoo both use standard HTTP port 80. Are you running a HTTP proxy, filter, or blocking?
Hotmail.com - There are multiple IP's that they can be hitting for access. Some are 64.4.44.7, 64.4.45.7, 64.4.52.7, 64.4.53.7, 64.4.54.7, and 64.4.43.7. This can and will change. Yahoo! Mail - There are multiple IP's that they can be hitting for access. Some are 216.115.106.35 and 216.115.106.34. This can and will change. What about logging all allowed outbound traffic to see when it is successful where it is going and what port it is using. Food for thought. Hope this helps. -----Original Message----- From: Mitch Planck [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 09, 2002 1:57 PM To: [EMAIL PROTECTED] Subject: [isp-security] sonicwall/hotmail Hi all, I've been working with a client for a bit on a perplexing problem. They have a small Sonicwall firewall which seems to work fine, except for one thing - it sometimes blocks hotmail and yahoo mail access. Here are the symptoms: you can login to the hotmail website most of the time, but not all the time. These times can be from one login to the next, just minutes apart. Sometimes it will go to an error page in the web browser saying the site is unavaliable. Also, once logged in, you can usually send and receive mail, but not all the time. Sometimes you will not be able to send mail - after clicking on send, nothing happens. Similar symptoms from yahoo mail. Here's what I've already tried: Thinking that what you pay for it what you get (nothing), I started with blaming hotmail, but since the hotmail access was fine at almost same time and with the same account and the same computer over a dial-up connection as it wasn't working from behind the firewall. Also, I removed the firewall at one point for a different reason and hotmail worked flawlessly during this period of time. I tried getting in touch with hotmail tech support, hah, no luck there, but I did stumble across the fact that you can use Outlook Express or Outlook 2002/XP to access your hotmail account. Add a new account and select HTTP and put in your hotmail account number and it goes. With this in place behind the firewall there is never a problem with hotmail access. I also called Sonicwall tech support and the techie there said that there are no known issues with hotmail, just to try setting the security to medium in IE. It already was. Has anyone run across this or know what may be going on? I'm not entirely convinced that it's the firewall blocking it, but I can come up with no other logical conclusion. Thanks in advance, Mitch Planck, CNE, CCNA ____________ The ISP-SECURITY Discussion List ____________ To Join: mailto:[EMAIL PROTECTED] To Remove: mailto:[EMAIL PROTECTED] Archives: http://isp-lists.isp-planet.com/isp-security/archives/ To Remove: mailto:%%email.unsub%% ____________ The ISP-SECURITY Discussion List ____________ To Join: mailto:[EMAIL PROTECTED] To Remove: mailto:[EMAIL PROTECTED] Archives: http://isp-lists.isp-planet.com/isp-security/archives/ To Remove: mailto:[EMAIL PROTECTED]
