ivucha:~ ivucha$ openconnect sslvpn.zolotoy.ru --user=Nekrylov.Maksim
POST https://sslvpn.zolotoy.ru/
Connected to 46.252.242.7:443
SSL negotiation with sslvpn.zolotoy.ru
Server certificate verify failed: signer not found

Certificate from VPN server "sslvpn.zolotoy.ru" failed verification.
Reason: signer not found
To trust this server in future, perhaps add this to your command line:
    --servercert sha256:dbaef44ad6fd7e641f574e99d15c6b07f3fbed8d38aa455ef53b54f096577bdb
Enter 'yes' to accept, 'no' to abort; anything else to view: yes
Connected to HTTPS on sslvpn.zolotoy.ru
XML POST enabled
Please enter your username and password.
GROUP: [zolotoy]:zolotoy
POST https://sslvpn.zolotoy.ru/
XML POST enabled
Please enter your username and password.
Password:
POST https://sslvpn.zolotoy.ru/
Got CONNECT response: HTTP/1.1 200 OK
CSTP connected. DPD 30, Keepalive 20
Connected as 10.168.253.177, using SSL
Established DTLS connection (using GnuTLS). Ciphersuite (DTLS0.9)-(RSA)-(AES-256-CBC)-(SHA1).
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1250 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1249 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1248 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1247 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1246 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1245 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1244 -5)
Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
Failed to send DPD request (1243 -5)
Detected MTU of 1242 bytes (was 1250)
mkdir: /var/run/vpnc: Permission denied
Failed to connect utun unit: Operation not permitted
Failed to open tun device: Operation not permitted
Set up tun device failed
Unknown error; exiting.
ivucha:~ ivucha$