Trying to establish link using pppd connection overlapped into stunnel 5.44. Server runs on OpenBSD 6.4, client uses the same stunnel and OS versions.

From the client's side I have to reconnect to stunnel-server in case of Internet link is dropped. And expecting that pppd session is kept by stunnel over reconnections possible.

But stunnel-server runs another pppd instance when stunnel-client reconnects. After reconnection in system processes I see two pppd processes (as shows below), and pppd link has no pings after it.

# ps -aux | grep pppd

user     45359  0.0  0.0   440  1672 ??   I      Tue11PM    0:00.01   lock passive 10.0.1.1:10.0.1.2 local debug noauth (pppd)

user     1156  0.0  0.0   321  1210 ??   I      Tue12PM    0:00.01   lock passive 10.0.1.1:10.0.1.2 local debug noauth (pppd)

1. The question is how to keep initial session established by stunnel-client and do not run second pppd process by stunnel-server?

2. May I keep session by cache-ID on the client's side only or do I need to do it on both client and server? Can it help not to run another pppd process?

Both server config and client config parts are below:

# cat /etc/stunnel/stunnel-server.conf

...

[ppp]

;SERVER

accept 1.2.3.4:443

exec = /usr/sbin/pppd

execargs = lock passive 10.0.1.1:10.0.1.2 local debug noauth

pty = yes

CAfile = ca.crt

cert = server.crt

key = server.key

verifyChain = yes

TIMEOUTclose = 0

...

# cat /etc/stunnel/stunnel-client.conf

...

[ppp]

;CLIENT

client = yes

retry = yes

connect = 1.2.3.4:443

exec = /usr/sbin/pppd

execargs = persist lock 10.0.1.2:10.0.1.1 local debug noauth name ppp-client

pty = yes

CAfile = ca.crt

cert = client.crt

key = client.key

verifyChain = yes

checkHost = hostname

;checkIP = 1.2.3.4

...

Thank you for answer in advance.