Hi Mikrotik Forum,
I’m facing a strange issue, between two mikrotik, that are running a sstp tunnel. The tunnel is always reestablised each 15 minutes exactly.
sstp-server is running RouterOS 6.37.1, sstp client is running RouterOS 6.35.4.
Here is the client configuration export :
/interface sstp-client
add connect-to=SERVER_IP disabled=no mrru=1600 name=sstp password=xxxxxxxxx profile=default-encryption user=sstp-user
Here is the server configuration :
/interface sstp-server
add name=sstp-user user=sstp-user
/interface sstp-server server
set certificate=vpn enabled=yes keepalive-timeout=disabled max-mru=1420 max-mtu=1420
The stp tunnel perfectly works, but only for 15 minutes. After 15 minutes, the tunnel is reestablished.
After enabling logs, I’ve discovered that the server send a termination message to the sstp client :
16:26:51 sstp,ppp,debug,packet sstp: rcvd LCP TermReq id=0x3
16:26:51 sstp,ppp,debug,packet connect time expired
16:26:51 sstp,ppp,debug sstp: LCP closed
16:26:51 sstp,ppp,debug sstp: CCP lowerdown
16:26:51 sstp,ppp,debug sstp: BCP lowerdown
16:26:51 sstp,ppp,debug sstp: BCP down event in starting state
16:26:51 sstp,ppp,debug sstp: IPCP lowerdown
16:26:51 sstp,ppp,debug sstp: IPCP closed
16:26:51 sstp,ppp,debug sstp: IPV6CP lowerdown
16:26:51 sstp,ppp,debug sstp: IPV6CP down event in starting state
16:26:51 sstp,ppp,debug sstp: MPLSCP lowerdown
I’ve updated many timeout or keepalice settings, without success, and do not find any documentation, or similar problem on any forum.
The issue is always the same : 15 minutes, and the tunnel is reestablished, so any forwarded protocols are interrupted…
Any help will be appreciated 
Thanks !