Hi,
I'm trying to setup a DNAT which forwards requests originally directed to
127.0.0.1:8404 to 10.1.3.253:8404.
/etc/shorewall/zones:
#ZONE TYPE OPTIONS IN OUT
# OPTIONS OPTIONS
fw firewall
lan ipv4
/etc/shorewall/interfaces:
###############################################################################
#ZONE INTERFACE OPTIONS
lan ens18
tcpflags,logmartians,nosmurfs,sourceroute=0,physical=ens18
/etc/shorewall/policy:
###############################################################################
#SOURCE DEST POLICY LOGLEVEL RATE CONNLIMIT
$FW lan ACCEPT
lan all ACCEPT $LOG_LEVEL
# The FOLLOWING POLICY MUST BE LAST
all all REJECT $LOG_LEVEL
/etc/shorewall/rules:
############################################################################################################################################################################
#ACTION SOURCE DEST PROTO DEST
SOURCE ORIGINAL RATE USER/ MARK CONNLIMIT
TIME HEAD
# PORT
PORT(S) DEST LIMIT GROUP
?SECTION ALL
?SECTION ESTABLISHED
?SECTION RELATED
?SECTION INVALID
?SECTION UNTRACKED
?SECTION NEW
# Drop packets in the INVALID state
Invalid(DROP) lan $FW tcp
# Drop Ping from the "bad" lan zone.. and prevent your log from being
flooded..
Ping(DROP) lan $FW
# Permit all ICMP traffic FROM the firewall TO the lan zone
ACCEPT $FW lan icmp
DNAT $FW:127.0.0.1 lan:10.1.3.253:8404 tcp 8404
===================================================================
Check and start works good:
root@log:/etc/shorewall# shorewall check
Checking using Shorewall 5.2.3.2...
Processing /etc/shorewall/params ...
Processing /etc/shorewall/shorewall.conf...
Loading Modules...
Checking /etc/shorewall/zones...
Checking /etc/shorewall/interfaces...
Determining Hosts in Zones...
Locating Action Files...
Checking /etc/shorewall/policy...
Adding Anti-smurf Rules
Checking TCP Flags filtering...
Checking Kernel Route Filtering...
Checking Martian Logging...
Checking Accept Source Routing...
Checking MAC Filtration -- Phase 1...
Checking /etc/shorewall/rules...
Checking /etc/shorewall/conntrack...
Checking MAC Filtration -- Phase 2...
Applying Policies...
Shorewall configuration verified
root@log:/etc/shorewall#
root@log:/etc/shorewall# shorewall start
Starting Shorewall....
Initializing...
Setting up Route Filtering...
Setting up Martian Logging...
Setting up Accept Source Routing...
Preparing iptables-restore input...
Running /sbin/iptables-restore --wait 60...
done.
root@log:/etc/shorewall# shorewall status
Shorewall-5.2.3.2 Status at log - Thu 02 Dec 2021 07:08:14 PM CET
Shorewall is running
State:Started Thu 02 Dec 2021 07:08:05 PM CET from /etc/shorewall/
(/var/lib/shorewall/firewall compiled Thu 02 Dec 2021 06:35:26 PM CET by
Shorewall version 5.2.3.2)
Unfortunately the port forwarding does not work:
root@log:/etc/shorewall# telnet 127.0.0.1 8404
Trying 127.0.0.1...
(telnet hangs with no response)
Could you help me to understand where I'm wrong, please?
Thank you very much!
Bye
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