[strongSwan] Local network (routing)

Rene Maurer rmnet at mailc.net
Mon Oct 10 15:44:35 CEST 2022


Hi

I am using strongSwan U5.4.0/K4.4.107 (embedded device).

The ipsec tunnel is established over a mobile network and it works fine.

Additionally I have an Ethernet interface eth0 with the address 10.162.110.161. eth0 is connected to 10.162.110.165.

I am looking for a way to access the devices connected to eth0 also locally and not only through the tunnel (connections 10.162.110.161 <=> 10.162.110.165 should work).

Is that even possible? If so how?

I have:
---------
# ipsec status
Security Associations (1 up, 0 connecting):
          one[1]: ESTABLISHED 9 seconds ago, 10.162.225.65[****]...91.230.141.233[****]
          one{1}:  INSTALLED, TUNNEL, reqid 1, ESP SPIs: cb51bd6c_i b9503f34_o
          one{1}:   10.162.110.160/29 === 10.0.0.0/
---------
# route -n
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0 ppp0
10.162.110.160  0.0.0.0         255.255.255.248 U     100    0        0 eth0
---------
ip route show table 220
10.0.0.0/8 via xxx.xxx.xxx.xxx dev ppp0 proto static src 10.162.110.161
----------
# ipsec.conf:
conn one
     # we are left
     left=10.162.225.65
     leftid=*****
     leftsubnet=10.162.110.160/29
     leftcert=****.crt
     leftsendcert=always

     # XXX is right
     right=xxx.xxx.xxx.xxx.
     rightid=****
     rightsubnet=10.0.0.0/8
     auto=start
----------

Regards
René


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