LAN Traffic

Unanswered Question
Sep 21st, 2010

People, i want to know if there's any chance, somtrouble in the LAN traffic, such as viruses or another issue can make a Cisco 2801 closes a port that is being natted and that I have to make a clear ip nat translation * for the Email server begins to receive mail again?:

ip nat inside source static tcp 192.168.0.4 21 xxxx.xxxx.xxxx.xxxx 21 extendable

ip nat inside source static tcp 192.168.0.4 25 xxxx.xxxx.xxxx.xxxx 25 extendable
ip nat inside source static tcp 192.168.0.4 53 xxxx.xxxx.xxxx.xxxx 53 extendable
ip nat inside source static tcp 192.168.0.4 85 xxxx.xxxx.xxxx.xxxx 85 extendable
ip nat inside source static tcp 192.168.0.4 110 xxxx.xxxx.xxxx.xxxx 110 extendable
ip nat inside source static tcp 192.168.0.4 143 xxxx.xxxx.xxxx.xxxx 143 extendable
ip nat inside source static tcp 192.168.0.4 366 xxxx.xxxx.xxxx.xxxx 366 extendable
ip nat inside source static tcp 192.168.0.4 389 xxxx.xxxx.xxxx.xxxx 389 extendable
ip nat inside source static tcp 192.168.0.4 465 xxxx.xxxx.xxxx.xxxx 465 extendable
ip nat inside source static tcp 192.168.0.4 587 xxxx.xxxx.xxxx.xxxx 587 extendable
ip nat inside source static tcp 192.168.0.4 993 xxxx.xxxx.xxxx.xxxx 993 extendable
ip nat inside source static tcp 192.168.0.4 995 xxxx.xxxx.xxxx.xxxx 995 extendable
ip nat inside source static tcp 192.168.0.4 1000 xxxx.xxxx.xxxx.xxxx 1000 extendable
ip nat inside source static tcp 192.168.0.4 4069 xxxx.xxxx.xxxx.xxxx 4069 extendable

Regards.

I have this problem too.
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