Date: Wed, 29 Jun 2016 15:00:39 +0100 From: krad <kraduk@gmail.com> To: "C. L. Martinez" <carlopmart@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Problems with pf rules for intercept squid proxy Message-ID: <CALfReyewwocG-sTs5wPhzWuUg5KyuqNTLDqRocNBQwr9ZUXj%2BQ@mail.gmail.com> In-Reply-To: <20160629135530.GA14559@beagle.bcn.sia.es> References: <20160628130759.GA13226@beagle.bcn.sia.es> <2822287D-FE6F-4A4B-995A-639B696911DF@FreeBSD.org> <20160629113324.GA10436@beagle.bcn.sia.es> <CALfReycmb%2BtW%2BRZMPiFqUwUbVmG7GbD4vAwt-igriL_i9x4Stw@mail.gmail.com> <20160629131951.GA12552@beagle.bcn.sia.es> <CALfReydN13fzvkQ=Wv84=MD4UpPL7T3uvRrQdTUVO3QWaTNHyw@mail.gmail.com> <CALfReyf97=nAi8X%2B8Z-GwJAXfLdDGXSL_HMW9hEoF6SgYR35bQ@mail.gmail.com> <CALfReyeyzU-J8iwa9iYsBefSTyb6eQTD=JYqWqy3o09-UBhSBg@mail.gmail.com> <20160629135530.GA14559@beagle.bcn.sia.es>
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the setup does fundamentally work as i'm using it, so you must be missing something, probably in your squid config. On 29 June 2016 at 14:55, C. L. Martinez <carlopmart@gmail.com> wrote: > Thanks Krad. And the answer for your questions is: yes. I have restarted > FreeBSD hosts after devfs change, my squid's config uses sslbump (it is the > same squid.conf file that I use in other OpenBSD host that works as > intercept proxy without problems)... My laptop has squid's cert installed > and acls are configured ... > > But nothing: it doesn't works. > > > On Wed 29.Jun'16 at 14:35:02 +0100, krad wrote: > > Also make sure you have opened the squid acl to you local network > > > > On 29 June 2016 at 14:33, krad <kraduk@gmail.com> wrote: > > > > > oh also if you are redirecting https you will need to setup squid to do > > > ssl bump and install certs on all your clients. As you havent supplied > your > > > squid.conf its difficult to know if thats correct. > > > > > > On 29 June 2016 at 14:32, krad <kraduk@gmail.com> wrote: > > > > > >> you need to as squid needs read write access to the /dev/pf to work in > > >> intercept mode. As long as you dont have any other users in the squid > group > > >> you are good. Did you restart devfs or reboot? > > >> > > >> > > >> On 29 June 2016 at 14:20, C. L. Martinez <carlopmart@gmail.com> > wrote: > > >> > > >>> Yep, is it not too dangerous to assign 0770 to /dev/pf?? > > >>> > > >>> Anyway, I have tried, but with same error: traffic is denied by > squid ... > > >>> > > >>> > > >>> On Wed 29.Jun'16 at 13:39:46 +0100, krad wrote: > > >>> > have you got these lines in your /etc/devfs.conf file > > >>> > > > >>> > > > >>> > own pf root:squid > > >>> > perm pf 0770 > > >>> > > > >>> > you also need lines like this in the squid.conf > > >>> > > > >>> > http_port 192.168.1.1:3128 intercept > > >>> > > > >>> > > > >>> > > > >>> > On 29 June 2016 at 12:33, C. L. Martinez <carlopmart@gmail.com> > wrote: > > >>> > > > >>> > > 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 > > >>> > > _______________________________________________ > > >>> > > freebsd-questions@freebsd.org mailing list > > >>> > > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > > >>> > > To unsubscribe, send any mail to " > > >>> > > freebsd-questions-unsubscribe@freebsd.org" > > >>> > > > > >>> > > >>> -- > > >>> Greetings, > > >>> C. L. Martinez > > >>> _______________________________________________ > > >>> freebsd-questions@freebsd.org mailing list > > >>> https://lists.freebsd.org/mailman/listinfo/freebsd-questions > > >>> To unsubscribe, send any mail to " > > >>> freebsd-questions-unsubscribe@freebsd.org" > > >>> > > >> > > >> > > > > > -- > Greetings, > C. L. Martinez > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org"help
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