Ok, I did some testing and it turns out the problem exists on NethServer 7, but not on NethServer 6.
Here is the network config:
eth0=ethernet|bootproto|dhcp|gateway||hwaddr|00:90:EE:EE:EE:02|onboot|yes|role|red
eth1=ethernet|bootproto|none|hwaddr|00:16:3E:E2:EE:EE|ipaddr|192.168.7.1|netmask|255.255.255.0|network|192.168.7.0|onboot|yes|role|green
On NS 6 (CentOS 6) both interfaces get the IP: eth0 from ISP’s DHCP, eth1 from static settings in the config.
However, on NS7 (CentOS 7), while the eth0 is working fine and there is internet connectivity, the eth1 remains with IP unassigned. Even if I assign the IP manually using ifconfig eth1 192.168.7.1 there still is no connectivity and pinging other LAN hosts is impossible:
ping 192.168.7.2
PING 192.168.7.2 (192.168.7.2) 56(84) bytes of data.
From 192.168.7.1 icmp_seq=1 Destination Host Unreachable
ping: sendmsg: Operation not permitted
From 192.168.7.1 icmp_seq=2 Destination Host Unreachable
ping: sendmsg: Operation not permitted
From 192.168.7.1 icmp_seq=3 Destination Host Unreachable
ping: sendmsg: Operation not permitted
From 192.168.7.1 icmp_seq=4 Destination Host Unreachable
ping: sendmsg: Operation not permitted
So there was either a change in configuration in NS7, or a bug. Can anyone comment?