That’s my first thought as well but OP states that this is only happening at home and not elsewhere so that basically rules out client configuration no?
I like your theory of conflicting subnets though, perhaps the client software detected the conflict THEN changed the default route.
Though OP’s home subnet seems to be 192.168.1.x while the VPN is 172.27.160.x
Three things I think are worth a try:
- Bypass your router at home, take the laptop directly to your modem and see if VPN split works.
- Connect to the mobile hotspot first then connect to VPN. By your description so far this should work.
- When at a location where the VPN split is working (eg. point above) print out the routing table again and compare to the one you posted earlier.
- I'm on fiber so no modem to connect to, however, back in the stone ages I had this same issue with my DSL provider (Cox).
- Connected to mobile hotspot via wifi and ran netstat:
Interface List
17...00 05 9a 3c 7a 00 ......Cisco AnyConnect Secure Mobility Client Virtual Mi
niport Adapter for Windows x64
12...3c a9 f4 62 8b 30 ......Intel(R) Centrino(R) Ultimate-N 6300 AGN
16...3c a9 f4 62 8b 31 ......Microsoft Virtual WiFi Miniport Adapter
13...b0 05 94 f8 26 1c ......Bluetooth Device (Personal Area Network)
11...f0 1f af 38 ba ff ......Intel(R) 82579LM Gigabit Network Connection
1...........................Software Loopback Interface 1
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.43.1 192.168.43.242 281
0.0.0.0 0.0.0.0 172.27.160.1 172.27.191.214 2
127.0.0.0 255.0.0.0 On-link 127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
172.27.160.0 255.255.224.0 On-link 172.27.191.214 257
172.27.191.214 255.255.255.255 On-link 172.27.191.214 257
172.27.191.255 255.255.255.255 On-link 172.27.191.214 257
192.168.43.0 255.255.255.0 On-link 192.168.43.242 281
192.168.43.0 255.255.255.0 172.27.160.1 172.27.191.214 2
192.168.43.1 255.255.255.255 On-link 192.168.43.242 26
192.168.43.242 255.255.255.255 On-link 192.168.43.242 281
192.168.43.255 255.255.255.255 On-link 192.168.43.242 281
198.206.246.225 255.255.255.255 192.168.43.1 192.168.43.242 26
224.0.0.0 240.0.0.0 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 192.168.43.242 281
224.0.0.0 240.0.0.0 On-link 172.27.191.214 257
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 192.168.43.242 281
255.255.255.255 255.255.255.255 On-link 172.27.191.214 257
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
0.0.0.0 0.0.0.0 172.27.160.1 1
===========================================================================
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
12 41 ::/0 fe80::b8d7:afff:fe7f:9d03
17 21 ::/0 On-link
1 306 ::1/128 On-link
12 33 2600:100d:b127:bc2d::/64 On-link
17 21 2600:100d:b127:bc2d::/64 On-link
12 281 2600:100d:b127:bc2d:d2:aa8e:104e:9467/128
On-link
12 281 2600:100d:b127:bc2d:6536:63ca:eeff:b2c7/128
On-link
17 276 fe80::/64 On-link
12 281 fe80::6536:63ca:eeff:b2c7/128
On-link
17 276 fe80::9039:3fe3:334d:4788/128
On-link
17 276 fe80::a960:75ba:2783:2bb9/128
On-link
1 306 ff00::/8 On-link
12 281 ff00::/8 On-link
===========================================================================
Persistent Routes:
None