samsung s9 nat port forwarding tethering

Samsung s9 nat port forwarding tethering how to#

However nc accepts only a single connection at a time.

But make sure that you get the right binary, there are multiple implementations of netcat. To forward port 2222: ~$ adb reverse tcp:2222 tcp:2222 Note that this won't work for ports under 1024. On non-rooted devices you can use adb or some other minimal TCP/UDP server like netcat or socat for port forwarding. If default POLICY of FORWARD chain in FILTER table is not ACCEPT, define rules explicitly to accept the forwarded packets: ~# iptables -I FORWARD -p tcp -d 192.168.43.10 -dport 22 -j ACCEPTĪlso accept outbound forwarded traffic if needed. This is the simplest form of Port Forwarding.

Let's say the IP address assigned by hotspot to PC is 192.168.43.10 and you want to forward SSH default port ( 22): ~# iptables -t nat -I PREROUTING -p tcp -dport 22 -j DNAT -to 192.168.43.10 In order to forward port, you need to do Destination Address Translation ( DNAT) using Linux kernel's builtin firewall userspace tool iptables.įirst make sure that kernel is configured to forward internet traffic (already set when hotspot is ON): ~# echo 1 >/proc/sys/net/ipv4/ip_forward Port forwarding is done with routers, and when being used as a Wi-Fi hotspot (or with USB tethering), your phone is in fact acting as a router. However if you can reach your phone from internet, extending this access to a connected host (PC in your case) is not a problem.

Samsung s9 nat port forwarding tethering how to#

To know the problem in detail and how it can be worked around see How to connect to Android through SSH over 3G/4G public IP? In most cases you won't be able to make inbound connection when using Mobile Data because of CGNAT and firewalls at ISP level, as explained by acejavelin in comment.