Hello.
I have Macbook Pro M3 Pro with MacOS Tahoe 26.0(and afret i upgraded
it to 26.2).
And openconnect v9.12
When i connected to vpn, sometimes connect to internet (non vpn
subnets) is broken.

For example, i without vpn i have default gateway 100.100.0.1 (my
local subnet 100.100.0.1/24)

❯ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags               Netif Expire
default            100.100.0.1        UGScg                 en0
100.100/24         link#14            UCS                   en0      !
100.100.0.1/32     link#14            UCS                   en0      !
100.100.0.1        50:ff:20:fc:61:7d  UHLWIir               en0   1194
100.100.0.34/32    link#14            UCS                   en0      !
100.100.0.145      b0:b2:1c:22:f3:8   UHLWI                 en0   1143
100.100.0.255      ff:ff:ff:ff:ff:ff  UHLWbI                en0      !
127                127.0.0.1          UCS                   lo0
127.0.0.1          127.0.0.1          UH                    lo0
169.254            link#14            UCS                   en0      !
224.0.0/4          link#14            UmCS                  en0      !
224.0.0.251        1:0:5e:0:0:fb      UHmLWI                en0
255.255.255.255/32 link#14            UCS                   en0      !

after connecting vpn i have this route table:

❯ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags               Netif Expire
default            100.100.0.1        UGScg                 en0
10/9               10.170.11.194      UGSc                utun4
10.128/10          10.170.11.194      UGSc                utun4
10.180.12/22       10.170.11.194      UGSc                utun4
10.170.11.194      10.170.11.194      UH                  utun4
10.192/12          10.170.11.194      UGSc                utun4
10.208/13          10.170.11.194      UGSc                utun4
10.224/11          10.170.11.194      UGSc                utun4
11                 10.170.11.194      UGSc                utun4
100.100/24         link#14            UCS                   en0      !
100.100.0.1/32     link#14            UCS                   en0      !
100.100.0.1        50:ff:20:fc:61:7d  UHLWIir               en0   1198
100.100.0.34/32    link#14            UCS                   en0      !
100.100.0.145      b0:b2:1c:22:f3:8   UHLWI                 en0   1101
100.100.0.255      ff:ff:ff:ff:ff:ff  UHLWbI                en0      !
127                127.0.0.1          UCS                   lo0
127.0.0.1          127.0.0.1          UH                    lo0
169.254            link#14            UCS                   en0      !
172.16/12          10.170.11.194      UGSc                utun4
188.93.55.4        100.100.0.1        UGHS                  en0
224.0.0/4          link#14            UmCS                  en0      !
224.0.0.251        1:0:5e:0:0:fb      UHmLWI                en0
255.255.255.255/32 link#14            UCS                   en0      !

All fine.
And sometimes without reason and any actions my route table is broken
- new default route (ip fron vpn) appears from somewhere

❯ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags               Netif Expire
default           10.170.11.194      UGSc                  utun4
default            100.100.0.1        UGScg                 en0
10/9               10.170.11.194      UGSc                utun4
10.128/10          10.170.11.194      UGSc                utun4
10.180.12/22       10.170.11.194      UGSc                utun4
10.170.11.194      10.170.11.194      UH                  utun4
10.192/12          10.170.11.194      UGSc                utun4
10.208/13          10.170.11.194      UGSc                utun4
10.224/11          10.170.11.194      UGSc                utun4
11                 10.170.11.194      UGSc                utun4
100.100/24         link#14            UCS                   en0      !
100.100.0.1/32     link#14            UCS                   en0      !
100.100.0.1        50:ff:20:fc:61:7d  UHLWIir               en0   1198
100.100.0.34/32    link#14            UCS                   en0      !
100.100.0.145      b0:b2:1c:22:f3:8   UHLWI                 en0   1101
100.100.0.255      ff:ff:ff:ff:ff:ff  UHLWbI                en0      !
127                127.0.0.1          UCS                   lo0
127.0.0.1          127.0.0.1          UH                    lo0
169.254            link#14            UCS                   en0      !
172.16/12          10.170.11.194      UGSc                utun4
188.93.55.4        100.100.0.1        UGHS                  en0
224.0.0/4          link#14            UmCS                  en0      !
224.0.0.251        1:0:5e:0:0:fb      UHmLWI                en0
255.255.255.255/32 link#14            UCS                   en0      !

and my connection to internet (non vpn resources) is broken

I found this discussions, but there is not workaround there.


https://discussions.apple.com/thread/256152228

and thoose:
https://github.com/zerotier/ZeroTierOne/issues/2520
https://forums.macrumors.com/threads/macos-tahoe-26-0-beta-2-bug-fixes-changes-and-more.2459528/page-10?post=34209029#post-34209029

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