I'm trying to do an ssh tunnel into a server behind NAT:
ssh from laptop --> Host with port forwarding in firewall --> Get directly into guest (172.16.0.2, behind host NAT).
Using iptables on Host - it will work:
# iptables -I OUTPUT -d 0.0.0.0/0 -j ACCEPT# iptables -I FORWARD -d 0.0.0.0/0 -j ACCEPT# iptables -I INPUT -d 0.0.0.0/0 -j ACCEPT# iptables -t nat -I PREROUTING -d 0.0.0.0/0 -p tcp --dport 222 -j DNAT --to-destination 172.16.0.2:22
However, iptables are not saved on Host reboot, since firewalld service is running (firewalld is the default in RHEL 7).
So I'm trying to do the same port forwarding with firewall-cmd.
Using firewall-cmd on Host - it will NOT work:
# firewall-cmd --permanent --zone=public --add-forward-port=port=222:proto=tcp:toport=22:toaddr=172.16.0.2'# firewall-cmd --permanent --zone=public --add-masquerade# firewall-cmd --permanent --direct --add-rule ipv4 filter FORWARD 0 -d 0.0.0.0/0 -j ACCEPT# firewall-cmd --permanent --direct --add-rule ipv4 filter OUTPUT 0 -d 0.0.0.0/0 -j ACCEPT# firewall-cmd --permanent --direct --add-rule ipv4 filter INPUT 0 -d 0.0.0.0/0 -j ACCEPT# firewall-cmd --permanent --direct --add-rule ipv4 nat PREROUTING 0 -d 0.0.0.0/0 -p tcp --dport 222 -j DNAT --to-destination 172.16.0.2:22# firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="0.0.0.0/0" forward-port port="222" protocol="tcp" to-port="22" to-addr='"172.16.0.2"# firewall-cmd --reload# firewall-cmd --list-allpublic (active) target: default icmp-block-inversion: no interfaces: enp4s0f0 sources: services: ssh dhcpv6-client ports: 8139/tcp protocols: masquerade: yes forward-ports: port=222:proto=tcp:toport=22:toaddr=172.16.0.2 source-ports: icmp-blocks: rich rules: rule family="ipv4" destination address="0.0.0.0/0" forward-port port="222" protocol="tcp" to-port="22" to-addr="172.16.0.2"# firewall-cmd --direct --get-all-rulesipv4 filter INPUT 0 -d 0.0.0.0/0 -j ACCEPTipv4 filter OUTPUT 0 -d 0.0.0.0/0 -j ACCEPTipv4 filter FORWARD 0 -d 0.0.0.0/0 -j ACCEPTipv4 nat PREROUTING 0 -d 0.0.0.0/0 -p tcp --dport 222 -j DNAT --to-destination 172.16.0.2:22
Now, when trying to connect to the guest - from my laptop, via host port 222 - the ssh connection is refused:
ssh -l stack my-host -p 222ssh: connect to host my-host port 222: Connection refused
Any idea what am I missing ?