hello dears and merry christmas to u all, i performed the required configurations of cisco pix 506 and tested the internet connections and found no problems at all for the internet browsing or downloading, but when i leave this pix working for some days the internet connections lost on all the computers and at this time when i replace the pix by normal dsl router i find no problem at all in the internet. this senario happened about three times so i want to know the cause of this case from something wrong on my configurations or on the pix itself (its IOS or hardware) and something like that, i appretiate the urgent response, thanks alot for your help and merry christmas