- stunnel-users - stunnel.org

using Android Keystore with stunnel
by blacksun＠directbox.com 09 Sep '20

09 Sep '20

Hello, i am using stunnel 5.56 on Android 7.0. It is a non-rooted device. Android stores keys and certs in the android keystore. I am using a Let's Encrypt Cert on serverside, and on clients the options veryChain and chechHost. How can i use the System-integrated CA-Certs of Android for verifying the server-cert issued by Let's Encrypt? When i am searching the net, there are infos saying that the certs and keys are not accessible by filestructure, but there would be apis to access the keystore. The keystore would be protected with the PIN of the device. Thanks.

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How to configure stunnel as HTTP proxy on Windows?
by Jason Long 08 Sep '20

08 Sep '20

Hello, I want to use stunnel on Windows as HTTP proxy, I changed the configuration as below: ; Encrypted HTTP proxy authenticated with a client certificate ; located in the Windows certificate store [example-proxy] client = yes accept = 127.0.0.1:8080 connect = google.com:8443 ;engineId = capi ; Encrypted HTTP proxy authenticated with a client certificate ; located in a cryptographic token [example-pkcs11] client = yes accept = 127.0.0.1:8080 connect = google.com:8443 ;engineId = pkcs11 cert = pkcs11:token=MyToken;object=MyCert key = pkcs11:token=MyToken;object=MyKey But, it show me configuration error. How can I solve it? Thank you.

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Stunnel - how to block IPs?
by Brent Kimberley 05 Sep '20

05 Sep '20

Hi James.To the best of my knowledge, your options include Darwin firewall and HAProxy - geoip. >>Just wondering if there is a way to have Stunnel not accept connection from certain IPs? stunnel -version stunnel 5.56 on x86_64-apple-darwin18.7.0 platform Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI

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Stunnel - how to block IPs?
by James Brown 03 Sep '20

03 Sep '20

Just wondering if there is a way to have Stunnel not accept connection from certain IPs? stunnel -version stunnel 5.56 on x86_64-apple-darwin18.7.0 platform Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI Thanks, James.

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TLS1.0 fallback when only TLS1.2 allowed
by Wojciech Machula 31 Aug '20

31 Aug '20

So I've configured my stunnel to only use TLS1.2 and usually works ok. However when client gets some bad L7 response it send a TCP RST, after which all subsequent stunnel TLS Client Hellos are some hybrid of TLS1.0/TLS1.2, as can be seen in tshark output below. Once I restart the whole stunnel process subsequent TLS handshakes work fine using TLS1.2, until the next client RST is received. $ stunnel -version stunnel 4.56 on x86_64-redhat-linux-gnu platform $ cat /etc/centos-release CentOS Linux release 7.8.2003 (Core) $cat /etc/stunnel/dsr2rtcg-stunnel.conf output = /var/log/stunnel pid = /etc/stunnel/stunnel.pid socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 [poc] cert = /etc/pki/tls/certs/stunnel/aaa.crt key = /etc/pki/tls/private/stunnel/aaa.key CAfile = /etc/pki/tls/certs/stunnel/bbb.crt client = yes sslVersion = TLSv1.2 options = NO_TLSv1 accept = 172.18.180.78:45154 connect = 10.74.0.196:45154 ciphers = TLSv1.2+HIGH:!aNULL $ tshark -nn -V -d tcp.port==45154,ssl -r 20200729_09:42:44-port45154.pcap -2R "ssl.handshake" -c 1 | grep -i tls -B3 Secure Sockets Layer SSL Record Layer: Handshake Protocol: Client Hello Content Type: Handshake (22) Version: TLS 1.0 (0x0301) -- Handshake Protocol: Client Hello Handshake Type: Client Hello (1) Length: 1610 Version: TLS 1.2 (0x0303)

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Sslkeylog
by Brent Kimberley 22 Aug '20

22 Aug '20

>>Any suggestions on sslkeylog via stunnel application Call SSL_CTX_set_keylog_callback() !? On Thu, Aug 13, 2020, 16:44 tayyib ahmed <tayyib76(a)gmail.com> wrote: > Hi Guys > > Is there any option to set sslkeylog to get ssl session id for stunnel > session? > > Br xx >

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How to archive DNS load balance in stunnel client?
by Peter Zhao 22 Aug '20

22 Aug '20

Hi, We are trying to use DNS load balance in a stunnel client with round-robin algorithm. service.example.com is mapping to two ips. But when we update DNS to remove one of ips for service.example.com stunnel client still forward requests to both ips. How to make stunnel client to resolve domain name and refresh its cache? Here is stunnel configuration. sslVersion=TLSv1.2 cert = /etc/stunnel/stunnel.pem output=/var/log/stunnel.log [service-client] client = yes accept = localhost:4680 connect = service.example.com:4680 [service-server] client = no accept = 10.10.0.16:4680 connect = loclhost:80 Here is the resolving result for service.example.com. ;; ANSWER SECTION: service.example.com. 5 IN A 10.10.0.16 service.example.com. 5 IN A 10.10.0.8

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Sslkeylog
by tayyib ahmed 16 Aug '20

16 Aug '20

Hi Guys Is there any option to set sslkeylog to get ssl session id for stunnel session? Br xx

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Stunnel 5.56 Windows 10 Service - Not functioning after Reboot
by Rod Marr 16 Aug '20

16 Aug '20

Hi all, I have installed Stunnel 5.56 win64 on a fully updated Windows 10 machine to work with Blue Iris. Stunnel operates well when I manually start it however I cannot get it to work automatically after a reboot. I have run the run the “stunnel Service Install” and “stunnel Service Start” shortcuts supplied, and in the first instance the service installs and starts. I can then connect through Stunnel to my Blue Iris server. I have found that after I reboot, the Stunnel service appears to start automatically but it is not functional. I cannot connect through it to Blue Iris. Stunnel is visible and Running in the Windows 10 Services list (from services.msc) and the Windows Task Manager shows a Process and Service active. To rectify this I can manually issue the “stunnel Service Stop”, followed by the “stunnel Service Start” shortcuts and the service becomes functional again. I have tried turning on debug info and the stunnel log file in stunnel.conf and see that log entries only begin after I have done the stop/start manual process. Thanks for any insight to what I’m sure I am missing here. Rod Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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Sslkeylog
by Brent Kimberley 15 Aug '20

15 Aug '20

No sign of SSL_CTX_set_keylog_callback()... Date: Thu, 13 Aug 2020 16:44:22 +0100 From: tayyib ahmed <tayyib76(a)gmail.com> To: stunnel-users(a)stunnel.org Subject:Hi Guys Is there any option to set sslkeylog to get ssl session id for stunnel session? Br xx

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