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Unable to access servers on DMZ after switching to Comcast internet using Cisco 2600 router

Shando1971 asked
Last Modified: 2012-05-08
We have 1 remote office tied to the HQ with a T1, we recently installed Comcast cable to the remote site to provide it with its own, all internet traffic is going to a proxy server and out to the internet, proxy setting in IE is configured not to use proxy for any internal IPs, both locations has a 2600 Cisco router. Once I configured the router for the new Comcast connection, we lost connection to the website, and our intranet server that are on a dmz at the head quarter. Please see the configuration below and let me know how I can resolve this issue.

version 12.2
service timestamps debug datetime
service timestamps log datetime
service password-encryption
service udp-small-servers
service tcp-small-servers
hostname router1

ip subnet-zero
no ip source-route
ip cef
no ip domain-lookup

interface FastEthernet0/0
 ip address
 ip nat inside
 no ip mroute-cache
 no keepalive
 speed 100
interface Serial0/0
 description Point-to-Point
 bandwidth 1544
 ip address 192.168.254.x

interface FastEthernet0/1
 description internet connection
 ip address 173.161.y.n
 ip nat outside
 no ip mroute-cache
 no keepalive
 speed 100
interface Serial0/1
 no ip address
router eigrp 10
 no eigrp log-neighbor-changes
ip nat inside source list ToNAT interface FastEthernet0/1 overload
ip classless
ip route 173.161.y.n2
no ip http server
ip pim bidir-enable
ip access-list extended ToNAT
 permit ip host (this is the proxy server's IP) any
access-list 199 permit icmp any any echo
access-list 199 permit icmp any any echo-reply
priority-list 1 protocol ip normal tcp 1494
priority-list 1 default high
dialer-list 1 protocol ip permit
route-map naci-worm permit 10
 match ip address 199
 match length 92 92
 set interface Null0
snmp-server community public RO
line con 0
 exec-timeout 0 0
 password 7 0826404F0A100005455F5552
 logging synchronous
no scheduler allocate
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