I will start by stating that I am currently studying for my CCENT, so I have a basic understanding of some of the requirements regarding NAT and ACL's but still learning. I have a study lab that I am trying to connect to the internet. The issue I am having is getting through the comcast gateway. I am using an 1841 Cisco router behind the gateway. Feel free to shred my config and offer any advice. I have racked my brains with what little I DO know to find a solution, and of course Comcast tech support will not help.
Gateway IP is 10.0.0.1 /24
Fa 0/1 faces the Comcast gateway (ip dhcp from gateway 10.0.0.41)
Fa 0/0 faces my LAN (ip 10.10.10.1 /24) statically assigned
Host (10.10.10.50 /24) can successfully ping both int on the 1841 as well as the gateway ip, but nothing past that.
Current configuration : 1313 bytes
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! Last configuration change at 03:41:51 UTC Fri May 5 2017 by lee
version 15.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
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hostname Maximus_3
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boot-start-marker
boot-end-marker
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enable secret 5 $1$n5p8$lSTZWvPuA2305FyVNsKCM0
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no aaa new-model
dot11 syslog
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ip cef
no ipv6 cef
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multilink bundle-name authenticated
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license udi pid CISCO1841 sn FTX13088BD1
username lee secret 5 $1$pVBb$57DcsEYj/2L6oyQekavNH/
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redundancy
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interface FastEthernet0/0
ip address 10.10.10.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
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interface FastEthernet0/1
ip address dhcp
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
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interface Serial0/0/0
no ip address
shutdown
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interface Serial0/1/0
no ip address
shutdown
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ip forward-protocol nd
no ip http server
no ip http secure-server
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ip nat inside source list GATEWAY interface FastEthernet0/0 overload
ip route 0.0.0.0 0.0.0.0 10.0.0.1
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ip access-list standard GATEWAY
permit any
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control-plane
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line con 0
exec-timeout 0 0
logging synchronous
login local
line aux 0
line vty 0 4
logging synchronous
login local
transport input telnet ssh
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scheduler allocate 20000 1000
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end
