Thanks everyone for responding. From all the suggestions I havethe following config.
ip address aa.aa.aa.aa 255.255.255.0
ip nat inside
ip address negotiated
ip access-group 100 in
ip nat outside
dialer pool 1
no cdp enable
ppp authentication chap callin
ppp chap hostname xxxxxxxxxxxxxxxx
ppp chap password xxxxxxxxxxxxxxxxxxx
ip nat inside source list 1 interface Dialer0 overload
ip nat inside source static bb.bb.bb.bb cc.cc.cc.cc
ip route 0.0.0.0 0.0.0.0 Dialer0
no logging trap
access-list 1 permit "local users"
The same problem is still there. Th overload works fine The Static NAT mapping bb.bb.bb.bb to cc.cc.cc.cc works incoming from the ISP and the translate packets appear on the local LAN. The return packets from the host appear in the debug IP NAt output but nothing appears is sent out the dialer interface
The issue is likely to be the fact that you used a loopback interface for the /29 range. I assume that this may cause the traffic to be routed there which is not good.
Remember that the ISP is routing the /29 to your outside ip address (the negotiated one). Hence all you need to do is to provide a translation mapping for these adresses to the corresponding inside ip.
For outgoing nat there is something like:
ip nat inside source list 1 interface Serial0/0 overload
Now, remove the loopback interface:
no int lo 0
Add a static translation:
ip nat inside source static tcp 10.66.1.10 80 80 extendable
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