[Oisf-users] Some problems with Suricata 3.1 using divert sockets

[C. L. Martinez]

On Thu  7.Jul'16 at 15:46:44 +0200, Victor Julien wrote:
> On 07-07-16 15:41, C. L. Martinez wrote:
> > Hi all,
> > 
> >  I have installed Suricata 3.1 under an OpenBSD 5.9 (fully patched) host to act as an IPS. I have configured pf to work with divert sockets:
> > 
> > block all
> > pass in inet proto tcp from 172.22.55.4 to !<internal_networks> tag 
> > intlans-to-inet
> > pass out quick on egress inet proto { tcp icmp udp } from 172.22.55.4 
> > divert-packet port 8000 nat-to (vio1:0)
> > 
> >  And I have configured a test rule with the following content:
> > 
> > drop tcp any any -> any any (msg:"OSNews is blocked"; content:"osnews.com"; http_header; nocase; classtype:policy-violation; sid:1;)
> > 
> >  ... but it doesn't works: Suricata doesn't trigger any alert (at this moment HOME_NET and EXTERNAL_NET have an "any"). Suricata is compiled with the following options:
> > 
> > root at obsdtest:/var/log/suricata# suricata --build-info    
> > This is Suricata version 3.1 RELEASE
> > Features: IPFW PCAP_SET_BUFF LIBPCAP_VERSION_MAJOR=1 HAVE_PACKET_FANOUT LIBNET1.1 HAVE_HTP_URI_NORMALIZE_HOOK PCRE_JIT HAVE_NSS HAVE_LUA HAVE_LUAJIT HAVE_LIBJANSSON 
> > SIMD support: none
> > Atomic intrisics: none
> > 64-bits, Little-endian architecture
> > GCC version 4.2.1 20070719 , C version 199901
> > compiled with _FORTIFY_SOURCE=2
> > L1 cache line size (CLS)=64
> > thread local storage method: pthread key
> > compiled with LibHTP v0.5.20, linked against LibHTP v0.5.20
> > 
> > Suricata Configuration:
> >   AF_PACKET support:                       no
> >   PF_RING support:                         no
> >   NFQueue support:                         no
> >   NFLOG support:                           no
> >   IPFW support:                            yes
> >   Netmap support:                          no
> >   DAG enabled:                             no
> >   Napatech enabled:                        no
> > 
> >   Unix socket enabled:                     yes
> >   Detection enabled:                       yes
> > 
> >   libnss support:                          yes
> >   libnspr support:                         yes
> >   libjansson support:                      yes
> >   hiredis support:                         no
> >   Prelude support:                         no
> >   PCRE jit:                                yes
> >   LUA support:                             yes, through luajit
> >   libluajit:                               yes
> >   libgeoip:                                yes
> >   Non-bundled htp:                         no
> >   Old barnyard2 support:                   no
> >   CUDA enabled:                            no
> >   Hyperscan support:                       no
> >   Libnet support:                          yes
> > 
> >   Suricatasc install:                      no
> > 
> >   Profiling enabled:                       no
> >   Profiling locks enabled:                 no
> > 
> > Development settings:
> >   Coccinelle / spatch:                     no
> >   Unit tests enabled:                      no
> >   Debug output enabled:                    no
> >   Debug validation enabled:                no
> > 
> > Generic build parameters:
> >   Installation prefix:                     /opt/suricata
> >   Configuration directory:                 /etc/suricata/
> >   Log directory:                           /var/log/suricata/
> > 
> >   --prefix                                 /opt/suricata
> >   --sysconfdir                             /etc
> >   --localstatedir                          /var
> > 
> >   Host:                                    x86_64-unknown-openbsd5.9
> >   Compiler:                                gcc (exec name) / gcc (real)
> >   GCC Protect enabled:                     yes
> >   GCC march native enabled:                no
> >   GCC Profile enabled:                     no
> >   Position Independent Executable enabled: yes
> >   CFLAGS                                   -g -O2 -D__OpenBSD__
> >   PCAP_CFLAGS                              
> >   SECCFLAGS                                -fstack-protector -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security
> > 
> > 
> > 
> >  Maybe exists some type of bug with divert sockets and Suricata??
> 
> I don't remember the reason, but I think our divert socket support has
> never worked with OpenBSD. FreeBSD for sure and OSX as well IIRC.
> 
> If anyone remembers why it never worked, please chime in!
> 

oops .. Really? Then, it is a problem for me. One question: will divert socket work under FreeBSD 10.x/11-CURRENT with pf or only with ipfw??

Thanks.

-- 
Greetings,
C. L. Martinez