HI! i have a centos 6.5 x64 with latest shorewall stable. All is ok until use dnat to permit incoming smtp/https to Exchange. For some reason some time de incoming conecctions tu smtp/https to Exchange is block, the port dont response. some idea for this error?! Thx.. pd:sorry for my english... ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk