<div dir="ltr"><div>Hello,</div><div><br></div><div>I am using squid 3.5.12(detailed version info is below) on Ubuntu 16.04.1 LTS server. My squid config is at, <a href="http://pastebin.com/raw/b8RZ67u9">http://pastebin.com/raw/<wbr>b8RZ67u9</a></div><div><br></div><div>I have configured squid as intercept proxy bumping all SSL https connections. Setup is working fine for many things like browsing,</div><div>even on command line like wget i can download via https as i have installed root certificate within my client os.</div><div><br></div><div>My issue is whenever i try to add extra repository via command, i.e.</div><div>sudo add-apt-repository ppa:ondrej/php</div><div>command fails with output "Cannot add PPA: 'ppa:~ondrej/ubuntu/php'.<wbr>ERROR: '~ondrej' user or team does not exist." and in squid's cache and access.log following entries can be located for this request,</div><div><br></div><div><span style="white-space:pre-wrap"> </span>==> /var/log/squid/access.log <==</div><div><span style="white-space:pre-wrap"> </span>1474302162.378 439 192.168.1.66 TAG_NONE/200 0 CONNECT <a href="http://91.189.89.223:443">91.189.89.223:443</a> - ORIGINAL_DST/<a href="http://91.189.89.223">91.189.89.223</a> -</div><div><br></div><div><span style="white-space:pre-wrap"> </span>==> /var/log/squid/cache.log <==</div><div><span style="white-space:pre-wrap"> </span>2016/09/19 21:52:42 kid1| Error negotiating SSL connection on FD 21: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca (1/0)</div><div><span style="white-space:pre-wrap"> </span>2016/09/19 21:52:42 kid1| hold write on SSL connection on FD 22</div><div><br></div><div><span style="white-space:pre-wrap"> </span>==> /var/log/squid/access.log <==</div><div><span style="white-space:pre-wrap"> </span>1474302162.885 403 192.168.1.66 TAG_NONE/200 0 CONNECT <a href="http://91.189.89.223:443">91.189.89.223:443</a> - ORIGINAL_DST/<a href="http://91.189.89.223">91.189.89.223</a> -</div><div><br></div><div><span style="white-space:pre-wrap"> </span>==> /var/log/squid/cache.log <==</div><div><span style="white-space:pre-wrap"> </span>2016/09/19 21:52:42 kid1| Error negotiating SSL connection on FD 21: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca (1/0)</div><div><br></div><div>in the above output 192.168.1.66 is my client requesting that request and as you can see in cache.log there is certificate negotiation error. I have tried to fiddle with all options provided at <a href="http://wiki.squid-cache.org/ConfigExamples/Intercept/SslBumpExplicit">http://wiki.squid-cache.org/<wbr>ConfigExamples/Intercept/<wbr>SslBumpExplicit</a> but it seems i am out of luck after almost half of my day battling this issue.</div><div><br></div><div>Can someone tell me they are successful with this issue? if so can you share your squid.conf relevant section?</div><div><br></div><div>$ squid -v</div><div>Squid Cache: Version 3.5.12</div><div>Service Name: squid</div><div>Ubuntu linux</div><div>configure options: '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/<wbr>include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/<wbr>info' '--sysconfdir=/etc' '--localstatedir=/var' '--libexecdir=${prefix}/lib/<wbr>squid3' '--srcdir=.' '--disable-maintainer-mode' '--disable-dependency-<wbr>tracking' '--disable-silent-rules' 'BUILDCXXFLAGS=-g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now' '--datadir=/usr/share/squid' '--sysconfdir=/etc/squid' '--libexecdir=/usr/lib/squid' '--mandir=/usr/share/man' '--with-openssl' '--enable-ssl-crtd' '--enable-inline' '--disable-arch-native' '--enable-async-io=8' '--enable-storeio=ufs,aufs,<wbr>diskd,rock' '--enable-removal-policies=<wbr>lru,heap' '--enable-delay-pools' '--enable-cache-digests' '--enable-icap-client' '--enable-follow-x-forwarded-<wbr>for' '--enable-auth-basic=DB,fake,<wbr>getpwnam,LDAP,NCSA,NIS,PAM,<wbr>POP3,RADIUS,SASL,SMB' '--enable-auth-digest=file,<wbr>LDAP' '--enable-auth-negotiate=<wbr>kerberos,wrapper' '--enable-auth-ntlm=fake,smb_<wbr>lm' '--enable-external-acl-<wbr>helpers=file_userip,kerberos_<wbr>ldap_group,LDAP_group,session,<wbr>SQL_session,unix_group,wbinfo_<wbr>group' '--enable-url-rewrite-helpers=<wbr>fake' '--enable-eui' '--enable-esi' '--enable-icmp' '--enable-zph-qos' '--enable-ecap' '--disable-translation' '--with-swapdir=/var/spool/<wbr>squid' '--with-logdir=/var/log/squid' '--with-pidfile=/var/run/<wbr>squid.pid' '--with-filedescriptors=65536' '--with-large-files' '--with-default-user=proxy' '--enable-build-info=Ubuntu linux' '--enable-linux-netfilter' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -Wall' 'LDFLAGS=-Wl,-Bsymbolic-<wbr>functions -fPIE -pie -Wl,-z,relro -Wl,-z,now' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security'</div>
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