Posted on 09/17/2003 11:33:00 AM PDT by hsmomx3
Why can't I share files or printers over the Internet?
For All Applications, All Operating Systems, and All Domains
1. What is happening?
In response to the newly announced vulnerability attributed to computers running certain Microsoft Operating Systems, SBC Internet Services has blocked TCP port 135. This port is known to be used by worms and viruses to spread to other computers through the Internet. Blocking this port may affect your ability to use:
* Microsoft Outlook to access a Microsoft Exchange server over the Internet.
* File sharing over the Internet.
* Print sharing over the Internet.
This action should not affect the vast majority of our members, and does not affect using Microsoft Outlook or other email programs over a local area network.
The block is scheduled to begin at 9 a.m. Central Daylight Time on Friday, September 12, 2003. Beginning at that time, you may notice that you are unable to continue these activities over the Internet. Other uses of your Internet Access service will not be affected.
2. How long will this port blocking last?
With the cooperation of subscribers, and the use of anti-virus software and firewalls, we hope to have this issue contained in a relatively short period of time. We are developing a solution that will allow individual members to request that the filter be removed as soon as possible on a limited basis. When implemented, this would allow members' computers to send and receive data traffic through port 135, but this would also expose the members' computers to the additional risk of re-infection or new infection. At this time, it’s not known when this option will be available.
3. What are workarounds?
You may be able to work around port blocking. Some workarounds you may want to investigate include:
* Using Microsoft Outlook Web Access.
* Using Microsoft point-to-point tunneling.
* Using a Virtual Private Network (VPN).
You may need assistance from a networking professional to set up these workarounds.
3. When did this go into effect?
9 a.m. Central Daylight Time on Friday, September 12, 2003.
4. Will anything else be affected?
Other computer applications may use port 135, although they are mostly used for the purposes outlined above.
5. Why are you doing this now?
As the result of a growing number of apparent security vulnerabilities, many Internet Service Providers, including SBC Internet Services, are blocking ports in an effort to protect their networks and the security of their customers’ computers. For more information on this, refer to Security Bulletin MS03-0391(824146) at Microsoft.
6. Because SBC Internet Services conducts security checks on its network, do members need to be concerned about additional Internet Security measures?
Yes, members should realize they are responsible for the security of their own computers. Our network security scans and port blocking is not a substitute for protecting and patching your own computers. We recommend use of personal hardware and/or software firewalls, and we suggest that all members install anti-virus software to scan the contents of their computers for viruses and worms.
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