I have a cisco 3600. I host my own mail, and when I try to get to my mail via the public address, my NAT table fills and my email service is halted. It will sometimes add hundreds of translations to the table. This apparently has no effect on the mail server. It just appears that the router is not closing its connections, but only for that IP. Anyone have any idea as to what could cause this?
Thank you for your response. I suppose that is always a possibility. I will check my inside computers for viruses.
my translation table looks something like the following.
Pro Inside Global Inside Local
-- xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx -- --
Where there is no protocol listed and my public address is listed under inside global, and my mail server's ip is listed under inside local. There is also nothing listed under the Outside local or global lines. It looks similar to a address that is DMZ'd, but mine is not. I have noticed that my NAT table does this when I am port scanned, but still only for this particular IP.
I have included captures of my NAT as it fills, and of my router config. Initailly, I thought when I got port scanned it filled up my NAT, but that only happens when I attempt to port scan a machine at one of our remote locations. That may be normal.
My router is already set to only accept connections for that IP on 3 ports only. But if you look at my example.txt file you will see that it fills with translations that look like a DMZ'd address, although this is not.
Thank you again for all your help! I really appreciate all you are doing for me.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.