OpenVPN Support Forum

Hi all,

I am having some issues connecting to my work VPN. This started a last days. please anyone help me for this issue

Sun Feb 19 07:58:42 2023 MANAGEMENT: CMD 'proxy HTTP 10.12.8.10 3128'
Sun Feb 19 07:58:43 2023 TCP/UDP: Preserving recently used remote address: [AF_INET]10.12.8.10:3128
Sun Feb 19 07:58:43 2023 ovpn-dco device [OpenVPN Data Channel Offload] opened
Sun Feb 19 07:58:43 2023 dco connect error: The network location cannot be reached. For information about network troubleshooting, see Windows Help. (errno=1232)
Sun Feb 19 07:58:43 2023 Closing DCO interface
Sun Feb 19 07:58:43 2023 SIGUSR1[soft,dco-connect-error] received, process restarting
Sun Feb 19 07:58:43 2023 MANAGEMENT: >STATE:1676768323,RECONNECTING,dco-connect-error,,,,,
Sun Feb 19 07:58:43 2023 Restart pause, 1 second(s)
Sun Feb 19 07:58:44 2023 MANAGEMENT: CMD 'proxy HTTP 10.12.8.10 3128'
Sun Feb 19 07:58:45 2023 TCP/UDP: Preserving recently used remote address: [AF_INET]10.12.8.10:3128
Sun Feb 19 07:58:45 2023 ovpn-dco device [OpenVPN Data Channel Offload] opened
Sun Feb 19 07:58:45 2023 TCP_CLIENT link local: (not bound)
Sun Feb 19 07:58:45 2023 TCP_CLIENT link remote: [AF_INET]10.12.8.10:3128
Sun Feb 19 07:58:45 2023 MANAGEMENT: >STATE:1676768325,WAIT,,,,,,

Sun Feb 19 08:20:39 2023 DEPRECATED OPTION: --cipher set to 'AES-256-CBC' but missing in --data-ciphers (AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305). OpenVPN ignores --cipher for cipher negotiations.
Sun Feb 19 08:20:39 2023 OpenVPN 2.6.0 [git:v2.6.0/b999466418dddb89] Windows-MSVC [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] [DCO] built on Feb 15 2023
Sun Feb 19 08:20:39 2023 Windows version 10.0 (Windows 10 or greater), amd64 executable
Sun Feb 19 08:20:39 2023 library versions: OpenSSL 3.0.8 7 Feb 2023, LZO 2.10
Sun Feb 19 08:20:39 2023 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25342
Sun Feb 19 08:20:39 2023 Need hold release from management interface, waiting...
Sun Feb 19 08:20:40 2023 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:50694
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'state on'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'log on all'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'echo on all'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'bytecount 5'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'state'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'hold off'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'hold release'
Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'proxy HTTP 10.12.8.10 3128'
Sun Feb 19 08:20:41 2023 TCP/UDP: Preserving recently used remote address: [AF_INET]10.12.8.10:3128
Sun Feb 19 08:20:41 2023 ovpn-dco device [OpenVPN Data Channel Offload] opened
Sun Feb 19 08:20:41 2023 TCP_CLIENT link local: (not bound)
Sun Feb 19 08:20:41 2023 TCP_CLIENT link remote: [AF_INET]10.12.8.10:3128
Sun Feb 19 08:20:41 2023 MANAGEMENT: >STATE:1676769641,WAIT,,,,,,

Hi,

ichsankrwn wrote: ↑

Sun Feb 19, 2023 1:31 am

Sun Feb 19 08:20:40 2023 MANAGEMENT: CMD 'proxy HTTP 10.12.8.10 3128'
Sun Feb 19 08:20:41 2023 TCP/UDP: Preserving recently used remote address: [AF_INET]10.12.8.10:3128
Sun Feb 19 08:20:41 2023 ovpn-dco device [OpenVPN Data Channel Offload] opened

Thanks for bringing this to our attention. DCO doesn't support HTTP or any other kind of proxies and OpenVPN should disable DCO when proxy is used. Meanwhile you may add

disable-dco

to your .ovpn profile.