Peace,
i have 2 proxies, one with ssl bump and one without, there is a internal site that opens only on the no ssl bump proxy.

on the ssl bump proxy it displays:


Не удается получить доступ к сайтуВеб-страница по адресу (i was unable to gain access to website:) https://test-auth.ias.ckko.nl/oauth/authorize?response_type=code&client_id=agoh1xHNNwaLZ65uspARyhYj7V8GTWla&state=guest&authentication=usbtoken&redirect_uri=https%3A%2F%2Fais.skko.by%2Foauth2%2Fcallback, возможно, временно недоступна или постоянно перемещена по новому адресу. (it is possible that it can not bbe reached or it has been permanently relocated to a new address)
ERR_TUNNEL_CONNECTION_FAILED

the site needs special configurations to run:
it needs a local proxy to run, avtunproxy.nl
in the internet explorer settings:
the second box in the proxy settings needs to be checked called the "use the scenario for automatic configuration"
in it, the proxy address is plugged
http://127.0.0.1:10224/proxy.pac

my bump settings are as follows:


acl     tls_s1_connect          at_step SslBump1
acl     tls_s2_client_hello     at_step SslBump2
acl     tls_s3_server_hello     at_step SslBump3

# define acls for sites that must not be actively bumped

acl     tls_allowed_hsts                ssl::server_name                        
.akamaihd.net
acl     tls_allowed_hsts                ssl::server_name                        
.proxy.ckko.nl
acl tls_server_is_bank ssl::server_name "/usr/local/ufdbguard/blacklists/finance/domains.squidsplice"
acl     tls_to_splice   any-of  tls_allowed_hsts tls_server_is_bank

# TLS/SSL bumping steps

ssl_bump                peek                            tls_s1_connect          
# peek at TLS/SSL connect data
ssl_bump                splice                          tls_to_splice           
# splice some: no active bump
ssl_bump                stare                           all                     
                # stare(peek) at server
                                                                                
                                # properties of the webserver
ssl_bump                bump

contents of the /usr/local/ufdbguard/blacklists/finance/domains.squidsplice file:

.ckko.nl
.ias.ckko.nl
.test-auth.ias.ckko.nl
.config.avtunproxy.nl
.rand.avtunproxy.nl
.avast.nl
.dev.avast.nl
.ncis.nl
.cdn.nlpost.nl

those are all the sites that are logged in on the non ssl bump proxy when ias.ckko.nl is accessed

despite all this configuration, the site does not open. in ufdbguard every site from the user is a pass.

in avtunproxy log :

2022/11/03 12:22:17.087001 |INF| [UPDATER] [TrustFirmware] fetching https://ckko.nl/upload/certificates/8.crl 2022/11/03 12:28:34.634001 |ERR| [rid=ab7a9b1c9f39fb3e] [addr=127.0.0.1:10523] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - EOF 2022/11/03 12:28:34.635001 |INF| [rid=ab7a9b1c9f39fb3e] [addr=127.0.0.1:10523] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 14.000000 ms 2022/11/03 12:28:34.663001 |ERR| [rid=47fba344ff078bcf] [addr=127.0.0.1:10526] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - read tcp 192.168.2.5:10527->10.0.0.18:8080: wsarecv: An existing connection was forcibly closed by the remote host. 2022/11/03 12:28:34.664001 |INF| [rid=47fba344ff078bcf] [addr=127.0.0.1:10526] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 17.000000 ms 2022/11/03 12:28:35.723001 |ERR| [rid=3f5ccf39ef0ae021] [addr=127.0.0.1:10529] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - EOF 2022/11/03 12:28:35.723001 |INF| [rid=3f5ccf39ef0ae021] [addr=127.0.0.1:10529] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 19.000000 ms 2022/11/03 12:28:35.748001 |ERR| [rid=c48d84308d001f59] [addr=127.0.0.1:10531] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - EOF 2022/11/03 12:28:35.748001 |INF| [rid=c48d84308d001f59] [addr=127.0.0.1:10531] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 12.000000 ms 2022/11/03 12:28:35.752001 |ERR| [rid=d181037283b2a34a] [addr=127.0.0.1:10532] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - EOF 2022/11/03 12:28:35.752001 |INF| [rid=d181037283b2a34a] [addr=127.0.0.1:10532] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 15.000000 ms 2022/11/03 12:28:40.775001 |ERR| [rid=27f00eecdbe53178] [addr=127.0.0.1:10537] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - read tcp 192.168.2.5:10538->10.0.0.18:8080: wsarecv: An existing connection was forcibly closed by the remote host. 2022/11/03 12:28:40.775001 |INF| [rid=27f00eecdbe53178] [addr=127.0.0.1:10537] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 19.000000 ms 2022/11/03 12:28:40.815001 |ERR| [rid=79611bea389d7c9c] [addr=127.0.0.1:10539] [PROXY parent=proxy.ckko.nl:8080] HTTP 500 - EOF 2022/11/03 12:28:40.816001 |INF| [rid=79611bea389d7c9c] [addr=127.0.0.1:10539] [PROXY parent=proxy.ckko.nl:8080] CONNECT test-oauth.ais.ckko.nl:443 -- 500 -- 14.000000 ms 2022/11/03 12:28:42.188001 |INF| [rid=7a104242baf9a559] [addr=127.0.0.1:10541] GET /static/jquery.js - HTTP 200 - OK 2022/11/03 12:28:42.190001 |INF| [rid=27a7baff0fe5d70e] [addr=127.0.0.1:10542] GET /static/bootstrap.js - HTTP 200 - OK 2022/11/03 12:28:42.192001 |INF| [rid=dbddaaa3f7759903] [addr=127.0.0.1:10459] GET /static/bootstrap.css - HTTP 200 - OK 2022/11/03 12:28:42.287001 |INF| [rid=7e81e98ea9c70d3f] [addr=127.0.0.1:10544] GET /api/v2/log


what is the solution?
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