VPN started disconnecting Mac

[Nikos Mavrogiannopoulos]

On Sun, Feb 12, 2017 at 2:56 PM, Minku Kumar <infominku at gmail.com> wrote:
> Hi Team,
> I’m unable to connect to VPN, seems it connects first and then starts
> disconnecting::
>
> Got CONNECT response: HTTP/1.1 200 OK
>
> CSTP connected. DPD 30, Keepalive 0
>
> Connected as 10.250.182.99, using SSL
>
> Established DTLS connection (using GnuTLS). Ciphersuite
> (DTLS0.9)-(RSA)-(AES-128-CBC)-(SHA1).
>
> Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
>
> Failed to send DPD request (1312 -5)
>
> Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
>
> Failed to send DPD request (1311 -5)
>
> Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
>
> Failed to send DPD request (1310 -5)
>
> Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
>
> Failed to send DPD request (1309 -5)
>
> Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
>
> Failed to send DPD request (1308 -5)
>
> Failed to write to SSL socket: The transmitted packet is too large (EMSGSIZE).
>
> Failed to send DPD request (1307 -5)
>
> Detected MTU of 1306 bytes (was 1312)

Could you add the logs at the disconnection point? What are you
quoting is the MTU detection phase which seems to succeed (drops the
negotiated MTU from 1312 to 1306).

regards,
Nikos