Re: Need help with DHCP

On Sep 26, 6:48 pm, "Song" <s...@xxxxxxxx> wrote:
Hi, I'm having problem adding DHCP service to my existing network. My
laptop is getting priviate IP assigned when plugged into FastEthernet4/0/0,
and I can ping them within network from my public subnet aa.bb.cc.0/20, but
I
can't seem to get out to the Internet from private subnet. Possibly a
routing issue? Please
help. Note: aa.bb.cc.0/20 is my public subnet, xx.yy.zz.48/30 is upstream
provider, 10.1.1.0/24 is unable to brows.

!
10.1.1.0 255.255.255.0
dns-server aa.bb.cc.3 aa.bb.cc.4
default-router 10.1.1.1
domain-name abc.com
lease infinite
!
interface FastEthernet4/0/0
ip address 10.1.1.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip route-cache flow
no ip mroute-cache
load-interval 30
full-duplex
no cdp enable
!
interface FastEthernet5/0/0
description --- Internet Gateway
ip address xx.yy.zz.50 255.255.255.248
ip access-group 111 in
ip verify unicast reverse-path
no ip redirects
no ip unreachables
no ip proxy-arp
ip route-cache flow
no ip mroute-cache
load-interval 30
full-duplex
no cdp enable
!
interface FastEthernet5/0/1
description --- LAN for Switch
ip address aa.bb.cc.1 255.255.240.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip route-cache policy
ip route-cache flow
no ip mroute-cache
load-interval 30
full-duplex
no cdp enable
!
ip route 0.0.0.0 0.0.0.0 xx.yy.zz.49

Without NATing, how is this supposed to work? You may route out to
the internet, but the internet does not know how to get back to a
private IP address range that is not NATed to a public IP. Am I
missing something?

.

Relevant Pages

  • Re: Need help with DHCP
    ... and I can ping them within network from my public subnet aa.bb.cc.0/20, ... can't seem to get out to the Internet from private subnet. ... interface FastEthernet4/0/0 ...
    (comp.dcom.sys.cisco)
  • Re: Need help with DHCP
    ... and I can ping them within network from my public subnet aa.bb.cc.0/20, ... interface FastEthernet4/0/0 ... Sorry, I forgot about NAT. ...
    (comp.dcom.sys.cisco)
  • Re: website resolves to internal DNS IP
    ... it gets the external NAT address and is translated internally. ... public subnet traffic out to the internet and back in? ... 443 traffic from our public subnet to our internal subnet that houses ... internal ips, narrowing any attacks they may present to us? ...
    (microsoft.public.windows.server.dns)
  • Re: HELP w/ Client internet
    ... > I did it so i can access the server from home with the ip address (the vpn ... >> why are you using a public subnet for your internal network? ... >> Then run the 'Connect to the internet' wiz again. ... >>> Ethernet adapter INTERNET: ...
    (microsoft.public.windows.server.sbs)
  • Re: HELP w/ Client internet
    ... why are you using a public subnet for your internal network? ... server IP' wizard and put yourself into a private subnet. ... Then run the 'Connect to the internet' wiz again. ... > Ethernet adapter INTERNET: ...
    (microsoft.public.windows.server.sbs)