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Windows file shares and firewall
We have a problem with windows file shares, and out new internal
firewall (packet filters between segments). The problem is, that after x minutes (x10) when users uses any ressource on a network drive (like an icon on the desktop), it will take 10-30 seconds extra for them. We have permitted port 135+137-139+445 from the client to the server segment. We drop unwanted packets (without sending info back to sender) And it normally works, except in the timeout situations. Our network people found out at one location, that opening port 80 to the servers (which are not running webservers), the problem seems to be solved. They probably get a "Connection Refused" back, and falls back to using the protocols they are supposed to. Only special thing here is a firewall client. Disabling that makes no difference. What is going on here ? |
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#2
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Windows file shares and firewall
"Povl H. Pedersen" wrote in message
m... We have permitted port 135+137-139+445 from the client to the server segment. We drop unwanted packets (without sending info back to sender) I don't know about the specific problem,..but after allowing these ports you've pretty much nullified any reason to bother with Layer4 Filtering to begin with. There really isn't anything else left at the Layer4 level (TCP, UDP, SPX) to block that is worth worrying about. All that is left is Layer3 Filtering that you could do with a simple LAN router and wouldn't need the Firewall,...which replacing the Firewall with a LAN router in of itself may cure your problem. Even a normal LAN router could filter what little remaining Layer4 possibilities their might be. -- Phillip Windell [MCP, MVP, CCNA] www.wandtv.com |
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