hello.
working config
not the changes in the access-list (switching source and destination)
Same for the address components in the crypto sections.
Also, the crypto map my-map should be bound to your external interface (potentially not dialer1)
Tim
!
!
crypto isakmp policy 2
encr 3des
hash md5
authentication pre-share
group 2
crypto isakmp xxx address ip.of.end.B
!
!
crypto ipsec transform-set tf-set esp-3des esp-md5-hmac
!
crypto map my-map 1 ipsec-isakmp
set peer ip.of.end.b
set transform-set tf-set
match address 101
!
!
!
interface Dialer1
crypto map my-map
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
!
access-list 101 permit ip you.subnet.side.a appropriate.mask.for.this your.subnet.side.b appropriate.mask.for.this
!
!
crypto isakmp policy 2
encr 3des
hash md5
authentication pre-share
group 2
crypto isakmp key xxx address ip.of.end.a
!
!
crypto ipsec transform-set tf-set esp-3des esp-md5-hmac
!
crypto map my-map 1 ipsec-isakmp
set peer ip.of.end.a
set transform-set tf-set
match address 101
!
!
!
interface Dialer1
crypto map my-map
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
!
access-list 101 permit ip you.subnet.side.b appropriate.mask.for.this your.subnet.side.a appropriate.mask.for.this