Hi All, Switch: WS-C3560-24PS-S, Version 12.2(44)SE5 OS: CentOS 6.4 64bit Squid Cache: Version 3.1.10 I have configure http and https transparent proxy. http is working but https I get below ssl error. Can someone help me? === ERROR === -----BEGIN SSL SESSION PARAMETERS----- MGQCAQECAgMBBAIAhAQABDAtguTUdfjS+XHNMVH8yE/G7mrHLTAiQP3+WGHcw7Qn TCQ+/HyRryhbeVj8du7ZKIahBgIEUhGoW6IEAgIBLKQCBACmEQQPbWFpbC5nb29n bGUuY29t -----END SSL SESSION PARAMETERS----- 2013/08/19 05:08:47| clientNegotiateSSL: Error negotiating SSL connection on FD 11: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca (1/0) -----BEGIN SSL SESSION PARAMETERS----- MGQCAQECAgMBBAIAhAQABDA1gje2u6jj32VBrrNC1l2GV9/M5waLsEfxjZwvUwrU TtpKFa0MiX4doFE59hPyFsihBgIEUhGoYKIEAgIBLKQCBACmEQQPcGx1cy5nb29n bGUuY29t -----END SSL SESSION PARAMETERS----- 2013/08/19 05:08:56| clientNegotiateSSL: Error negotiating SSL connection on FD 11: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca (1/0) 2013/08/19 05:09:12| clientNegotiateSSL: Error negotiating SSL connection on FD 11: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca (1/0) 2013/08/19 05:09:44| clientNegotiateSSL: Error negotiating SSL connection on FD 11: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca (1/0) 2013/08/19 05:10:49| clientNegotiateSSL: Error negotiating SSL connection on FD 11: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca (1/0) === ERROR === === IPTABLES === iptables -t nat -A PREROUTING -i bond0 -p tcp -m tcp -s 10.200.33.0/24 --dport 80 -j DNAT --to-destination 10.200.41.76:3127 iptables -t nat -A PREROUTING -i bond0 -p tcp -m tcp -s 10.200.33.0/24 --dport 443 -j DNAT --to-destination 10.200.41.76:3129 === IPTABLES === === SQUID CONFIGURATION === http_port 3128 http_port 3127 intercept https_port 3129 intercept ssl-bump cert=/etc/squid/myconfigure.pem key=/etc/squid/myconfigure.pem ssl_bump allow all always_direct allow all wccp2_router 10.200.41.1 wccp2_forwarding_method 2 wccp2_return_method 2 wccp2_assignment_method mask wccp2_service standard 0 wccp2_service dynamic 70 wccp2_service_info 70 protocol=tcp flags=dst_ip_hash priority=240 ports=443 wccp2_weight 1000 squid -v Squid Cache: Version 3.1.10 configure options: '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--enable-internal-dns' '--disable-strict-error-checking' '--exec_prefix=/usr' '--libexecdir=/usr/lib64/squid' '--localstatedir=/var' '--datadir=/usr/share/squid' '--sysconfdir=/etc/squid' '--with-logdir=$(localstatedir)/log/squid' '--with-pidfile=$(localstatedir)/run/squid.pid' '--disable-dependency-tracking' '--enable-arp-acl' '--enable-follow-x-forwarded-for' '--enable-auth=basic,digest,ntlm,negotiate' '--enable-basic-auth-helpers=LDAP,MSNT,NCSA,PAM,SMB,YP,getpwnam,multi-domain-NTLM,SASL,DB,POP3,squid_radius_auth' '--enable-ntlm-auth-helpers=smb_lm,no_check,fakeauth' '--enable-digest-auth-helpers=password,ldap,eDirectory' '--enable-negotiate-auth-helpers=squid_kerb_auth' '--enable-external-acl-helpers=ip_user,ldap_group,session,unix_group,wbinfo_group' '--enable-cache-digests' '--enable-cachemgr-hostname=localhost' '--enable-delay-pools' '--enable-epoll' '--enable-icap-client' '--enable-ident-lookups' '--enable-linux-netfilter' '--enable-referer-log' '--enable-removal-policies=heap,lru' '--enable-snmp' '--enable-ssl' '--enable-storeio=aufs,diskd,ufs' '--enable-useragent-log' '--enable-wccpv2' '--enable-esi' '--with-aio' '--with-default-user=squid' '--with-filedescriptors=16384' '--with-dl' '--with-openssl' '--with-pthreads' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'target_alias=x86_64-redhat-linux-gnu' 'CFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fpie' 'LDFLAGS=-pie' 'CXXFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fpie' --with-squid=/builddir/build/BUILD/squid-3.1.10 === SQUID CONFIGURATION === === SWITCH CONFIGURATION === ip wccp web-cache redirect-list 101 group-list 50 ip wccp 70 redirect-list 101 group-list 50 ! ! interface Vlan33 ip address 10.200.33.1 255.255.255.0 ip wccp web-cache redirect in ip wccp 70 redirect in ! ! access-list 50 permit 10.200.41.76 access-list 101 permit tcp 10.200.33.0 0.0.0.255 any eq www access-list 101 permit tcp 10.200.33.0 0.0.0.255 any eq 443 sh ip wccp Global WCCP information: Router information: Router Identifier: 10.200.41.1 Protocol Version: 2.0 Service Identifier: web-cache Number of Service Group Clients: 1 Number of Service Group Routers: 1 Total Packets s/w Redirected: 0 Process: 0 CEF: 0 Redirect access-list: 101 Total Packets Denied Redirect: 0 Total Packets Unassigned: 21 Group access-list: 50 Total Messages Denied to Group: 0 Total Authentication failures: 0 Total Bypassed Packets Received: 0 Service Identifier: 70 Number of Service Group Clients: 1 Number of Service Group Routers: 1 Total Packets s/w Redirected: 0 Process: 0 CEF: 0 Redirect access-list: 101 Total Packets Denied Redirect: 0 Total Packets Unassigned: 42 Group access-list: 50 Total Messages Denied to Group: 0 Total Authentication failures: 0 Total Bypassed Packets Received: 0 sh ip wccp web-cache view WCCP Routers Informed of: 10.200.41.1 WCCP Clients Visible: 10.200.41.76 WCCP Clients NOT Visible: -none- sh ip wccp 70 view WCCP Routers Informed of: 10.200.41.1 WCCP Clients Visible: 10.200.41.76 WCCP Clients NOT Visible: -none- sh ip wccp 70 detail WCCP Client information: WCCP Client ID: 10.200.41.76 Protocol Version: 2.0 State: Usable Redirection: L2 Packet Return: L2 Packets Redirected: 0 Connect Time: 14:50:32 Assignment: MASK Mask SrcAddr DstAddr SrcPort DstPort ---- ------- ------- ------- ------- 0000: 0x00000000 0x00001741 0x0000 0x0000 Value SrcAddr DstAddr SrcPort DstPort CE-IP ----- ------- ------- ------- ------- ----- 0000: 0x00000000 0x00000000 0x0000 0x0000 0x0AC8294C (10.200.41.76) sh ip wccp web-cache detail WCCP Client information: WCCP Client ID: 10.200.41.76 Protocol Version: 2.0 State: Usable Redirection: L2 Packet Return: L2 Packets Redirected: 0 Connect Time: 14:51:02 Assignment: MASK Mask SrcAddr DstAddr SrcPort DstPort ---- ------- ------- ------- ------- 0000: 0x00000000 0x00001741 0x0000 0x0000 Value SrcAddr DstAddr SrcPort DstPort CE-IP ----- ------- ------- ------- ------- ----- 0000: 0x00000000 0x00000000 0x0000 0x0000 0x0AC8294C (10.200.41.76) === SWITCH CONFIGURATION ===