Following up on my own post with some new information and puzzler:
On Thu, Jul 17, 2008, Bill Campbell wrote:
On Thu, Jul 17, 2008, Timothy Selivanow wrote:
...
After letting things sit overnight, and seeing ``IPsec-SA expired'' messages in /var/log/messages, I tried again this afternoon. without success. There are some things that seem noteworthy to me.
There was no traffic between the machines until I started ``tcpdump'' on one, at which time it initiated the handshaking with the machine here (one machine is here on M.I. the other in Kansas City).
When racoon starts, there is a message in /var/log/messages, ``racoon: ERROR: racoon: MLS support is not enabled''. I haven't been able to figure out what that means.
The Kansas City machine is running kernel 2.6.18-53.1.14.el5 SMP, x86_64.
The M.I. machine is running 2.6.18-53.1.21.el5PAE SMP i686...
The M.I. machine hosts several VMware virtual machines so both its NICs are in promiscuous mode.
I tried setting up a different machine here on M.I. to connect, changed the remote IP on the Kansas City machine, and am able to create a tunnel, ping, and ssh from M.I. to K.C., but cannot do any of these from K.C. to M.I.
There are *NO* iptables rules on either machine at present. To the best of my knowledge there are no IP filters between the Internet and these machines. The one in K.C. is a DSL modem on a /29 net block while the connection here is via an Integra/Eschelon Adtran channel bank to a T1 to our 192.136.111.0/24 block.
I cannot understand how a connection works one way, but not the other on what is supposed to be symmetric.
Bill