Today afternoon when i turn on my computer and opens internet explorer type the hotmail address to check my e-mail but it fails.
then tries some other sites but all are failed to open.
this happen first time to me.
i was shocked what happens.
i check the ping status of both the default gateway and the DNS.
both pings are working correctly.
then i goto my modems page setting
check there everything was OK.
but browsing is not working.
in the end i re-start my modem
my modem took longer time to sync as it take usually .
it take about 3 minutes to sync
now i start opening hotmail, yahoo, gmail and other sites
and checked everything is working fine.
the issue is solved.
so i check my modem settings page.
in that page i saw PRIMARY DNS SERVER address is changed.
its a new address which i never saw before.
its the 5th DNS of PTCL.
my modem is set for automatic assigned DNS.
when i re-start my Modem it detect the new DNS and thats why take some longer time to sync.
I m informing you peoples and making this new thread.
so that you peoples will also tell here about any issue which u face like me.