I'm trying to connect two PCs in a local network and I am having difficulties. Some information about my setup:pc1: OS GNU/Linux  Mageiapc2: OS GNU/Linux  Debianpc1 pings to pc2 with no problem, but pc2 ping to pc1 fails. This is the out console in pc2->data for pc2:ping -I eth0 100.10.2.104PING 100.10.2.104 (100.10.2.104) from 100.10.2.103 eth0: 56(84) bytes of data.^C--- 100.10.2.104 ping statistics ---6 packets transmitted, 0 received, 100% packet loss, time 5040msother data:    netstat -rnKernel IP routing tableDestination     Gateway         Genmask         Flags   MSS Window  irtt Iface0.0.0.0         100.10.2.1      0.0.0.0         UG        0 0          0 eth0100.10.2.0      0.0.0.0         255.255.255.0   U         0 0          0 eth0169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0ifconfigeth0      Link encap:Ethernet            inet addr:100.10.2.103  Bcast:100.10.2.255  Mask:255.255.255.0data for pc1:ping -I eth0 100.10.2.103ping oknetstat -rn    Kernel IP routing table    Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface    0.0.0.0         100.10.2.1      0.0.0.0         UG        0 0          0 enp2s0    100.10.2.0      0.0.0.0         255.255.255.0   U         0 0          0 enp2s0    169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 enp2s0   ifconfig    eth0      Link encap:Ethernet                inet addr:100.10.2.104  Bcast:100.10.2.255  Mask:255.255.255.0We have done several things including sysctl -w net.apv4.ipforward=1 and sysctl -w net.apv4.ipforward=0 on both computers and nothing all the sameWhat could be my mistake that causes pc2 not to receive the packages?thanks for reading and apologize for my bad English
Error while trying to connect 2 pcs in lan
linux;networking;ethernet
That doesn't seem to be the usual local network address - they usually start with 10.0.0.0/8 or 172.16.0.0/16 or 192.168.0.0/16.  100.10.2.103 & 104 goes to some Verizon server in Kansas & New Jersey respectively.  Maybe your local network start with 10 instead of 100?