VERY strange port 80 issue

hi all

getting strange issue mac desktop (lion os x).

can ftp, use skype , view https pages no problem. if try view website firefox/safari giving "connecting to..." , busy icon. absolutely nothing beyond that.

strangely can reach www.google.com , search websites, clicking of results gets me nowhere.

mac connected vista pc via router. vista pc sharing 3g usb modems connection.

have windows 7 pc connected via router well. both windows machines have no issue browsing.

mac dhcp, windows 7 dhcp , vista pc (internet connection pc) setup static ip.

no firewalls running.

using network utility on mac ping www.apple.com returns results.

mac can see shares on windows system no problem.

lion server running web server on (for local site development). oddly main lion server website seems "mac.local" , below folder points "var/empty", not sure if relevant.

didnt install software on machines , waas working fine night before. morning when turned on pcs , mac when started.

ideas can try please try sort this.

have tried:

reboot of machines.
trying macs ethernet in different router port.
renewing dhcp licenses on mac.

many thanks
john

 

clearly internet sort of working. can reach google. issue appears reaching else besides google.

success reaching 1 site followed timeouts on other sites dns issue. try overriding , putting opendns or googledns entries in mac (in properties tcpip ethernet) rather letting pc autoassign dns via dhcp. should not able reach google, should able reach link google sends to.

 

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