[Oisf-users] Packet not dropped?

[James Moe]

On 17/11/2018 5.06 PM, Andreas Herz wrote:

> Can you share how you are running suricata?
>
/usr/local/bin/suricata -v --pidfile /data01/var/run/suricata.pid -c
/usr/local/etc/suricata/suricata.yaml -q 0

> Which configuration are you using?
>
$ suricata --build-info
This is Suricata version 4.1.0 RELEASE
Features: NFQ PCAP_SET_BUFF AF_PACKET HAVE_PACKET_FANOUT LIBCAP_NG
LIBNET1.1 HAVE_HTP_URI_NORMALIZE_HOOK PCRE_JIT HAVE_LIBJANSSON TLS MAGIC
RUST
SIMD support: SSE_3
Atomic intrisics: 1 2 4 8 16 byte(s)
64-bits, Little-endian architecture
GCC version 7.3.1 20180323 [gcc-7-branch revision 258812], C version 199901
compiled with _FORTIFY_SOURCE=0
L1 cache line size (CLS)=64
thread local storage method: __thread
compiled with LibHTP v0.5.28, linked against LibHTP v0.5.28

Suricata Configuration:
  AF_PACKET support:                       yes
  eBPF support:                            no
  XDP support:                             no
  PF_RING support:                         no
  NFQueue support:                         yes
  NFLOG support:                           no
  IPFW support:                            no
  Netmap support:                          no
  DAG enabled:                             no
  Napatech enabled:                        no
  WinDivert enabled:                       no

  Unix socket enabled:                     yes
  Detection enabled:                       yes

  Libmagic support:                        yes
  libnss support:                          no
  libnspr support:                         no
  libjansson support:                      yes
  liblzma support:                         no
  hiredis support:                         no
  hiredis async with libevent:             no
  Prelude support:                         no
  PCRE jit:                                yes
  LUA support:                             no
  libluajit:                               no
  libgeoip:                                no
  Non-bundled htp:                         no
  Old barnyard2 support:                   no
  Hyperscan support:                       no
  Libnet support:                          yes
  liblz4 support:                          yes

  Rust support:                            yes (default)
  Rust strict mode:                        no
  Rust debug mode:                         no
  Rust compiler:                           rustc 1.24.1
  Rust cargo:                              cargo 0.26.0

  Suricatasc install:                      yes

  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:                     /usr/local
  Configuration directory:                 /usr/local/etc/suricata/
  Log directory:                           /usr/local/var/log/suricata/

  --prefix                                 /usr/local
  --sysconfdir                             /usr/local/etc
  --localstatedir                          /usr/local/var

  Host:                                    x86_64-pc-linux-gnu
  Compiler:                                gcc (exec name) / gcc (real)
  GCC Protect enabled:                     no
  GCC march native enabled:                yes
  GCC Profile enabled:                     no
  Position Independent Executable enabled: no
  CFLAGS                                   -g -O2 -march=native
-I${srcdir}/../rust/gen/c-headers
  PCAP_CFLAGS                               -I/usr/include
  SECCFLAGS

> Are the rules changed from alert to drop?
>
  Yes.

drop ip any any -> any any (msg:"SURICATA Applayer Detect protocol only
one direction"; flow:established;
app-layer-event:applayer_detect_protocol_only_one_direction;
flowint:applayer.anomaly.count,+,1; classtype:protocol-command-decode;
sid:2260002; rev:1;)

  The original post showed the log entry with "[DROP]" in it. Yet the
Alert entry showed the entry was not dropped.


-- 
James Moe
moe dot james at sohnen-moe dot com
520.743.3936
Think.

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