OpenConnect VPN - trouble routing traffic

Hi,

I have read many topics and tried different solutions, without success.
I can connect into the VPN and it seems to work, but fails a little while later.

Anyone might know what is going wrong?

Thank you,
Renato

Sat Jul  6 19:05:34 2024 daemon.info openconnect[23392]: Got CONNECT response: HTTP/1.1 200 OK
Sat Jul  6 19:05:34 2024 daemon.info openconnect[23392]: CSTP connected. DPD 30, Keepalive 20
Sat Jul  6 19:05:34 2024 daemon.info openconnect[23392]: Connected as 143.107.252.129, using SSL, with DTLS in progress
Sat Jul  6 19:05:35 2024 daemon.info openconnect[23392]: Established DTLS connection (using GnuTLS). Ciphersuite (DTLS0.9)-(DHE-CUSTOM)-(AES-256-CBC)-(SHA1).
Sat Jul  6 19:05:35 2024 user.notice openconnect: Connect Banner:
Sat Jul  6 19:05:36 2024 user.notice openconnect: | Clique Accept para iniciar navegacao ou Disconnect para cancelar.
Sat Jul  6 19:05:36 2024 user.notice openconnect: |
Sat Jul  6 19:05:41 2024 daemon.notice openconnect[23392]: DTLS got write error: Error in the push function.. Falling back to SSL
Sat Jul  6 19:05:54 2024 daemon.notice openconnect[23392]: DTLS handshake failed: Resource temporarily unavailable, try again.
Sat Jul  6 19:06:55 2024 daemon.notice openconnect[23392]: DTLS handshake failed: A TLS fatal alert has been received.
Sat Jul  6 19:07:55 2024 daemon.notice openconnect[23392]: DTLS handshake failed: A TLS fatal alert has been received.

$ ifconfig

br-lan    Link encap:Ethernet  HWaddr 94:83:C4:41:04:DE
          inet addr:192.168.8.1  Bcast:192.168.8.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4081 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3837 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:746727 (729.2 KiB)  TX bytes:1872213 (1.7 MiB)

eth0      Link encap:Ethernet  HWaddr 94:83:C4:41:04:DD
          inet addr:192.168.18.9  Bcast:192.168.19.255  Mask:255.255.254.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:27352 errors:0 dropped:75 overruns:0 frame:0
          TX packets:20861 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:17276564 (16.4 MiB)  TX bytes:4535457 (4.3 MiB)
          Interrupt:4

eth1      Link encap:Ethernet  HWaddr 94:83:C4:41:04:DE
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1126 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:239695 (234.0 KiB)
          Interrupt:5

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:175 errors:0 dropped:0 overruns:0 frame:0
          TX packets:175 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16012 (15.6 KiB)  TX bytes:16012 (15.6 KiB)

vpn-vpn   Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:143.107.252.129  P-t-P:143.107.252.129  Mask:255.255.255.255
          inet6 addr: fe80::95ab:7af:1de6:a617/64 Scope:Link
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1300  Metric:1
          RX packets:28 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:1268 (1.2 KiB)  TX bytes:8399 (8.2 KiB)

wlan0     Link encap:Ethernet  HWaddr 94:83:C4:41:04:DD
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4080 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4120 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:803841 (785.0 KiB)  TX bytes:2050502 (1.9 MiB)

I guess your issue is with this banner but you should ask the upstream developers - Issues · OpenConnect VPN projects / OpenConnect · GitLab