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Operating Systems Linux Red Hat iptable port forwarding between two lan interface Post 302644135 by ygemici on Monday 21st of May 2012 10:57:42 AM
Old 05-21-2012
try like this
Code:
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 22 -j DNAT --to 10.2.1.52:22
iptables -A FORWARD -p tcp -d 10.2.1.52 --dport 22 -j ACCEPT

Code:
# cat /etc/sysconfig/iptables
-N In_RULE_0
-A In_RULE_0  -j LOG  --log-level info --log-prefix "RULE 0 -- FORWARDINGSSH "
-A INPUT -p tcp -m tcp  --dport 22 -j In_RULE_0

# vi /etc/syslog.conf
kern.debug                                              /var/log/iptables
# service syslog restart
# tail -f /var/log/iptables

or trace with
Code:
# tcpdump -i eth1 port 22

 

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IPTABLES-SAVE(8)                                                  iptables 1.6.1                                                  IPTABLES-SAVE(8)

NAME
iptables-save -- dump iptables rules to stdout ip6tables-save -- dump iptables rules to stdout SYNOPSIS
iptables-save [-M modprobe] [-c] [-t table] ip6tables-save [-M modprobe] [-c] [-t table] DESCRIPTION
iptables-save and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect- ion provided by your shell to write to a file. -M, --modprobe modprobe_program Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe to determine the exe- cutable's path. -c, --counters include the current values of all packet and byte counters in the output -t, --table tablename restrict output to only one table. If not specified, output includes all available tables. BUGS
None known as of iptables-1.2.1 release AUTHORS
Harald Welte <laforge@gnumonks.org> Rusty Russell <rusty@rustcorp.com.au> Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save. SEE ALSO
iptables-apply(8),iptables-restore(8), iptables(8) The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the internals. iptables 1.6.1 IPTABLES-SAVE(8)
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