My cisco 2621 is running IOS version 12.3(24) with firewall feature set. The router has 64Mb RAM and 16Mb flash.
I have a simple network with F0/0 is connected to my cable modem netowrk and F0/1 is my LAN network. I only have single Windows XP machine on the LAN side. Under normal condition, I can telnet and ssh into the router without any issues. By the way, NO ACL blocking access-list on the router whatsover.
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
ip nat inside source list 100 interface f0/0 overload
ip address dhcp
ip nat outside
ip address 192.168.1.1 255.255.255.0
ip nat inside
Whenever I start the bit-torrent application, I can NO longer telnet into the router. Even when I stop the bit-torrent on my Windows XP machine, I still can not telnet into the router. The only way to telnet to the router is to physically reboot the router. After that, I can telnet to the router. As soon as I enable bit-torrent application, I lost telnet access to the router.
If I replace the router with a cheap $30 vyatta router running on a PC, I have no such issue.
Anyone know why Cisco 2621 can not handle bit-torrent application? Thanks.