I am working on one Linux box. I want something like this.
network--->wlan0---->eth0-->other server.
Both wlan0 and eth0 interface reside inside same Linux box. I am using dhcp which is assigning something say 192.168.3.21 to my wlan0 interface. I am assigning static IP say 192.168.3.101 to my eth0 interface and 192.168.3.102 to other server. Now, I want to ping from the network(192.168.3.XX) to other server at the address of 192.168.3.102 and my eth0 at 192.168.3.101. I am unable to do so.
I am not even able to ping my other server at 192.168.3.102 from my linux box.
I have enabled ip forwarding via "echo 1 > /proc/sys/net/ipv4/ip_forward" command.
I have used the following command to enable nat forwarding too.
iptables -A FORWARD -i wlan0 -o eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -i eth0 -o wlan0 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
Still I am unable to ping.
Please, let me know what I am missing. Any help will be so much appreciated.
Here is the output of iptables-save :-
# Generated by iptables-save v1.6.0 on Mon Feb 19 10:17:54 2018
*raw
:PREROUTING ACCEPT [481:39595]
:OUTPUT ACCEPT [325:24634]
COMMIT
# Completed on Mon Feb 19 10:17:54 2018
# Generated by iptables-save v1.6.0 on Mon Feb 19 10:17:54 2018
*nat
:PREROUTING ACCEPT [1:229]
:INPUT ACCEPT [1:229]
:OUTPUT ACCEPT [1:76]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -o wlan0 -j MASQUERADE
-A POSTROUTING -o eth0 -j MASQUERADE
COMMIT
# Completed on Mon Feb 19 10:17:54 2018
# Generated by iptables-save v1.6.0 on Mon Feb 19 10:17:54 2018
*mangle
:PREROUTING ACCEPT [482:39927]
:INPUT ACCEPT [474:38801]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [325:24634]
:POSTROUTING ACCEPT [325:24634]
COMMIT
# Completed on Mon Feb 19 10:17:54 2018
# Generated by iptables-save v1.6.0 on Mon Feb 19 10:17:54 2018
*filter
:INPUT ACCEPT [63:6229]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [1:76]
-A FORWARD -i wlan0 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
COMMIT
# Completed on Mon Feb 19 10:17:54 2018
Here is my output for ip route:-
default via 192.168.0.1 dev wlan0 metric 10 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.190 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.235