IPSec Routing questions

[Circuitsoft]

I'm trying to set up an IPSec net-to-net tunnel. The other end is a MikroTik router. I have it mostly working now, but it seems like there's a routing issue within the PfSense setup.

192.168.37.1/24->PfSense->Internet->MikroTik->192.168.40.1/24

192.168.37.2# ping 192.168.40.1
 <succeeds>192.168.37.2# traceroute -n 192.168.40.1
traceroute to 192.168.40.1 (192.168.40.1), 30 hops max, 60 byte packets
 1  192.168.37.1  0.665 ms  0.770 ms  0.846 ms
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * * *
 7  *^C
192.168.37.2# ping 192.168.40.2
 <fails>192.168.37.2# traceroute -n 192.168.40.2
traceroute to 192.168.40.2 (192.168.40.2), 30 hops max, 60 byte packets
 1  192.168.37.1  0.598 ms  0.626 ms  0.656 ms
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * * *
 7  *^C

192.168.40.2# ping 192.168.37.1
 <succeeds>192.168.40.2# ping 192.168.37.2
 <succeeds>192.168.40.2# traceroute -n 192.168.37.2
 1  192.168.40.1  0.204 ms  0.297 ms  0.365 ms
 2  * * *
 3  192.168.37.2  71.548 ms  71.669 ms  71.868 ms</succeeds></succeeds></fails></succeeds>

I am thoroughly confused at this point. Any ideas?

[Circuitsoft]

Edit: This was just a figment of netcat. Happens locally too.

~~One more hint: What are these Xs?

192.168.37.2# nc -l -p 1234 -uvvv
listening on [any] 1234 ...
192.168.40.2: inverse host lookup failed: Unknown host
connect to [192.168.37.2] from (UNKNOWN) [192.168.40.2] 49339
XXXXXhello
^C sent 0, rcvd 11

192.168.40.2# echo hello | nc 192.168.37.2 1234 -u -vvv
Connection to 192.168.37.2 1234 port [udp/*] succeeded!
^C
```~~