Date: Wed, 29 Jun 2016 11:33:24 +0000 From: "C. L. Martinez" <carlopmart@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Problems with pf rules for intercept squid proxy Message-ID: <20160629113324.GA10436@beagle.bcn.sia.es> In-Reply-To: <2822287D-FE6F-4A4B-995A-639B696911DF@FreeBSD.org> References: <20160628130759.GA13226@beagle.bcn.sia.es> <2822287D-FE6F-4A4B-995A-639B696911DF@FreeBSD.org>
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On Tue 28.Jun'16 at 19:37:37 +0200, Kristof Provost wrote: > > > On 28 Jun 2016, at 15:07, C. L. Martinez wrote: > > I have some problems with my pf rules on a FreeBSD 10.3 host that acts > > as a squid intercept proxy. My actual pf rules are: > > > > rdr pass on $vpnif proto tcp from $int_network to any port http -> lo0 > > port 5144 > > rdr pass on $vpnif proto tcp from $int_network to any port https -> lo0 > > port 5145 > > > > At first stage it seems that these rules works, but don't. Traffic is > > redirected to squid, but squid denies all connections: > > > > 1467111934.502 1 172.22.55.1 TCP_DENIED/403 4221 GET > > http://www.osnews.com/ - HIER_NONE/- text/html > > > > Using same squid.conf's file under an OpenBSD test machine, squid works > > without problems. For this reason, I don't think there is some problem > > with my squid's config. The only difference between this OpenBSD host > > and FreeBSD are the pf rules. > > > You may have a different squid version, or they may be patched differently. > Your redirect rules are working, as demonstrated by the fact that squid gets > a request, and replies to it. > > Note that pf does not change your HTTP payload, it only affects TCP. In > other words: if Squid sees the connection (and it does) it’s a Squid > problem. > > Also note that you’re redirecting on FreeBSD, but using divert-to on > OpenBSD. > This may be triggering different behaviour from Squid. The man page says > that with divert-to: > > The packets will not be modified, so getsockname(2) on the socket will > return > the original destination address of the packet. > > That might be affecting an ACL in Squid. > > Regards, > Kristof Thanks Kristof. I am using squid installed from pkg under a FreeBSD 10.3, fully updated: Squid Cache: Version 3.5.19 Service Name: squid configure options: '--with-default-user=squid' '--bindir=/usr/local/sbin' '--sbindir=/usr/local/sbin' '--datadir=/usr/local/etc/squid' '--libexecdir=/usr/local/libexec/squid' '--localstatedir=/var' '--sysconfdir=/usr/local/etc/squid' '--with-logdir=/var/log/squid' '--with-pidfile=/var/run/squid/squid.pid' '--with-swapdir=/var/squid/cache' '--without-gnutls' '--enable-auth' '--enable-build-info' '--enable-loadable-modules' '--enable-removal-policies=lru heap' '--disable-epoll' '--disable-linux-netfilter' '--disable-linux-tproxy' '--disable-translation' '--disable-arch-native' '--enable-eui' '--enable-cache-digests' '--enable-delay-pools' '--disable-ecap' '--disable-esi' '--enable-follow-x-forwarded-for' '--enable-htcp' '--enable-icap-client' '--enable-icmp' '--enable-ident-lookups' '--enable-ipv6' '--enable-kqueue' '--with-large-files' '--enable-http-violations' '--without-nettle' '--enable-snmp' '--enable-ssl' '--with-openssl=/usr' 'LIBOPENSSL_CFLAGS=-I/usr/include' 'LIBOPENSSL_LIBS=-lcrypto -lssl' '--enable-ssl-crtd' '--disable-stacktraces' '--enable-ipf-transparent' '--enable-ipfw-transparent' '--enable-pf-transparent' '--with-nat-devpf' '--enable-forw-via-db' '--enable-wccp' '--enable-wccpv2' '--with-heimdal-krb5=/usr' 'CFLAGS=-I/usr/include -O2 -pipe -fstack-protector -fno-strict-aliasing' 'LDFLAGS=-L/usr/lib -pthread -fstack-protector' 'LIBS=-lkrb5 -lgssapi -lgssapi_krb5 ' 'KRB5CONFIG=/usr/bin/krb5-config' '--enable-auth-basic=DB SMB_LM MSNT-multi-domain NCSA PAM POP3 RADIUS fake getpwnam NIS' '--enable-auth-digest=file' '--enable-external-acl-helpers=file_userip time_quota unix_group' '--enable-auth-negotiate=kerberos wrapper' '--enable-auth-ntlm=fake smb_lm' '--enable-storeio=aufs diskd rock ufs' '--enable-disk-io=DiskThreads DiskDaemon AIO Blocking IpcIo Mmapped' '--enable-log-daemon-helpers=file' '--enable-url-rewrite-helpers=fake' '--enable-storeid-rewrite-helpers=file' '--prefix=/usr/local' '--mandir=/usr/local/man' '--infodir=/usr/local/info/' '--build=amd64-portbld-freebsd10.1' 'build_alias=amd64-portbld-freebsd10.1' 'CC=cc' 'CPPFLAGS=' 'CXX=c++' 'CXXFLAGS=-O2 -pipe -fstack-protector -fno-strict-aliasing ' 'CPP=cpp' --enable-ltdl-convenience According to this options, intercept is enabled ... Then, I don't understand why it doesn't works ... -- Greetings, C. L. Martinez
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