heya,

i tried this setup with IPV4 addresses on the same subnet (10.0.3.1 and
10.0.3.2) and it worked fine, i.e. i "tcpdump -i enc0" and see encapsulated
packets. this leaves me wondering what it is about my prior setup that made it
not work. 

i saw no appreciable difference in the outputs from each case (working and not
working) aside from the absence of messages like:

164326.277770 Cryp 10 crypto_decrypt: before decryption:
164326.279023 Cryp 10 548cc6fb a5c81656 67dd3c90 72907baf cca756ff 2e182d03
f3d68549 84eb0feb
164326.279774 Cryp 10 27c3abc6 b6db491e b9dbb4c6 2cc566c7 833f8826 309e1fbd
479254b7 ac05df31
164326.286832 Cryp 10 crypto_encrypt: before encryption:
164326.287746 Cryp 10 0800000c 01000000 0a000301 0b000018 50c521ac 5d8677fa
daf211c7 b41ac606
164326.288767 Cryp 10 a0436258 0000001c 00000001 01106002 12fda71d b73f6e3c
1e79a24f bdb98bed

and

164326.068356 Exch 10 nat_t_exchange_check_nat_d: NAT detected, we're behind it
...
164326.289836 Mesg 10 virtual_send_message: enabling NAT-T encapsulation for
this exchange

in the not working case.

any ideas on why this works in the case i have delineated (from 10.0.3.1 to
10.0.3.2) and doesn't work when i have my endpoints at 10.0.0.2 and 10.0.3.2?
does this have something to do with NAT detection?

>i'm trying to establish a tunnel between two hosts (both are
>pentium IIs running a snapshot from 10/28) the with IPs
>10.0.0.2 and 10.0.3.2 and living on my home network with
>topology as shown:
>
>#############        ############################
># 10.0.0.2  #--------# 10.0.0.1    pub IP = Z   #
>#############        # 10.0.3.1                 #
>                     ############################
>                          |
>                          |
>                     ###############
>                     # 10.0.3.2    #
>                     ###############

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