Your mileage may vary. ############################################################################### # From internal application to external host ############################################################################### # [Int_Init] -> [Int_Term] -> [Ext_Init] -> [Ext_Term] ############################################################################### # [internal_initiator]  ---ssl--->  [Internal terminator] # [Internal terminator] ---http---> [external Initiator] # [external Initiator]  ---tls--->  [external terminator] ############################################################################### # https://www.stunnel.org/static/stunnel.html ############################################################################### [Internal_Terminator] options = SSLv3 client = no accept = host_ip:443 connect = localhost:54321 CAfile         = int_init_wallet.pem cert           =  int_term_pub.pem key            =  int_term_priv.pem [External_Initiator] options = SINGLE_ECDH_USE options = SINGLE_DH_USE ciphers = ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256 verify = 3? client = yes options = TLSv1.2 accept = localhost:54321 connect = externalhostname:443 verifyChain    = yes renegotiation  = no CAfile         =  ext_term_wallet.pem cert           = ext_init_pub.pem key            =  ext_init_priv.pem ---------------------------------------------------------------------- Date: Mon, 19 Aug 2019 18:21:18 +0000 From: Daniel Trickett <daniel.trickett@milliporesigma.com> To: "stunnel-users@stunnel.org" <stunnel-users@stunnel.org> Subject: [stunnel-users] https to https proxy Hi, Our punchout vendor switched their site to only accept tls 1.2 over the weekend. Unfortunately our application will only support SSL. We are using stunnel with other vendors but can control the inbound host name. This recent one is one we can't manage as it is the software provider. I found a solution for doing https to https. I'm unclear how I get the first https traffic to route to stunnel as the initial call will be from the application will be to the external host.. Any thoughts on whether this would work for my situation?  Appreciate any thoughts.. [Tunnel_in] client = yes accept = host_ip:443 connect = localhost:54321 [Tunnel_out] client = no accept = localhost:54321 connect = externalhostname:443 Best regards, Dan