System: kubernetes cluster running on vagrant using virtualbox
Pod A: 10.246.79.2 on minion 2
Pod B: 10.246.61.3 on minion 3
Pod C: 10.246.61.2 on minion 3

When a container in Pod C accepts a socket connection from Pod A, it sees the peer socket IP as 10.246.79.0, which happens to be the IP address of the flannel0 interface on minion 2.

Is there something wrong with my network configuration? I used the defaults that came with vagrant.

UPDATE: Actually, I found that the problem is due to IP Masquerading. I found this in iptables:

Chain POSTROUTING (policy ACCEPT)
num target prot opt source destination
1 MASQUERADE all -- 10.246.79.0/24 0.0.0.0/0

However, I thought flannel was set up with masquerading turned off:
[vagrant@kubernetes-minion-2 ~]$ cat /run/flannel/subnet.env
FLANNEL_SUBNET=10.246.79.1/24
FLANNEL_MTU=1472
FLANNEL_IPMASQ=false

So I'm still confused...