Hello Stefan, Do you think if this fix for IDS on green is also possible?

There are multiple topics on forum about this issue. IDS on green doesn't work.

Hello Blago,

your described problem does not belong to the discussed one. This issue will be one of the next one on my list. -Stefan

Poslano s mog Windows Phonea

Šalje:

Stefan Schantl

Poslano:

‎16.‎10.‎2015. 18:49

Prima:

development@lists.ipfire.org

Predmet:

[PATCH] snort: Also monitor assigned alias addresses on red.

These changes will allow snort to also inspect the traffic for

one or more configured alias addresses, which has not been done in the past.

The current situation is, that snort if enabled on red, only inspects

the traffic which is desired to the statically configured red address.

If some alias addresses have been assigned to the red interface the

traffic to these addresses will not be checked by snort and

completely bypasses the IDS.

There is no user interaction required, nor visible-effects or any

backward-compatiblity required, only a restart of snort after the

update process to protect all red addresses.

To do this we will now check if, the RED interface has been set to STATIC (which

is required to use the aliases function) and any aliases have been configured. In

case of this, the modified code will add all enabled alias addresses to the HOMENET

variable in which snort is storing all the monitored addresses.

Fixes #10619.

Signed-off-by: Stefan Schantl

---

src/initscripts/init.d/snort | 15 +++++++++++++++

1 file changed, 15 insertions(+)

diff --git a/src/initscripts/init.d/snort b/src/initscripts/init.d/snort

index e03c80f..58edf1e 100644

--- a/src/initscripts/init.d/snort

+++ b/src/initscripts/init.d/snort

@@ -20,6 +20,8 @@ PATH=/usr/local/sbin:/usr/local/bin:/bin:/usr/bin:/sbin:/usr/sbin; export PATH

eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)

eval $(/usr/local/bin/readhash /var/ipfire/snort/settings)

+ALIASFILE="/var/ipfire/ethernet/aliases"

case "$1" in

     start)

             if [ "$BLUE_NETADDRESS" ]; then

@@ -59,6 +61,19 @@ case "$1" in

                     if [ "$LOCAL_IP" ]; then

                             HOMENET+="$LOCAL_IP,"

                     fi

•                   # Check if the red device is set to static and
  
  

•                   # any aliases have been configured.
  
  

•                   if [ "${RED_TYPE}" == "STATIC" ] && [ -s "${ALIASFILE}" ]; then
  
  

•                           # Read in aliases file.
  
  

•                           while IFS="," read -r address mode remark; do
  
  

•                                   # Check if the alias is enabled.
  
  

•                                   [ "${mode}" = "on" ] || continue
  
  

•                                   # Add alias to the list of HOMENET addresses.
  
  

•                                   HOMENET+="${address},"
  
  

•                           done < "${ALIASFILE}"
  
  

•                   fi
  
             fi
  
             HOMENET+="127.0.0.1"
  
             echo "ipvar HOME_NET [$HOMENET]" > /etc/snort/vars