I have a dedicated server in Hetzner. In which I have installed CentOS 7.4, inside it I have KVM with another CentOS 7.4.
I have requested an additional ip from Hetzner that has a Mac separated for virtualization purposes.
I would like the guest to have access to the internet and that this virtual machine can be accessed from the internet.
Here's the data from the two ips I have with Hetzner robot.
Main IP: AA.BBB.CCC.DD
Gateway: AA.BBB.CCC.1
Netmask: 255.255.255.192
Broadcast: AA.BBB.CCC.63
Additional IP: AA.BBB.CCC.EE
Gateway: AA.BBB.CCC.1
Netmask: 255.255.255.192
Broadcast: AA.BBB.CCC.63
This is the file /etc/sysctl.d/99-hetzner.conf configuration
### Hetzner Online GmbH installimage
# sysctl config
net.ipv4.ip_forward=1
net.ipv4.conf.all.rp_filter=1
net.ipv4.icmp_echo_ignore_broadcasts=1
# ipv6 settings (no autoconfiguration)
net.ipv6.conf.default.autoconf=0
net.ipv6.conf.default.accept_dad=0
net.ipv6.conf.default.accept_ra=0
net.ipv6.conf.default.accept_ra_defrtr=0
net.ipv6.conf.default.accept_ra_rtr_pref=0
net.ipv6.conf.default.accept_ra_pinfo=0
net.ipv6.conf.default.accept_source_route=0
net.ipv6.conf.default.accept_redirects=0
net.ipv6.conf.all.autoconf=0
net.ipv6.conf.all.accept_dad=0
net.ipv6.conf.all.accept_ra=0
net.ipv6.conf.all.accept_ra_defrtr=0
net.ipv6.conf.all.accept_ra_rtr_pref=0
net.ipv6.conf.all.accept_ra_pinfo=0
net.ipv6.conf.all.accept_source_route=0
net.ipv6.conf.all.accept_redirects=0
This is the initial configuration just installed and running host
DEVICE=enp0s31f6
ONBOOT=yes
BOOTPROTO=none
IPADDR=AA.BBB.CCC.DD
NETMASK=255.255.255.255
SCOPE="peer AA.BBB.CCC.1"
IPV6INIT=yes
IPV6ADDR=2a01:4f8:13b:1801::2/64
IPV6_DEFAULTGW=fe80::1
IPV6_DEFAULTDEV=enp0s31f6
This is the previous file modified to get a bridge
DEVICE=enp0s31f6
ONBOOT=yes
HWADDR=90:1b:0e:ee:05:4e
BOOTPROTO=none
IPADDR=AA.BBB.CCC.DD
NETMASK=255.255.255.192
SCOPE="peer AA.BBB.CCC.1"
BRIDGE=br0
This is the br0 file I created
DEVICE=br0
TYPE=Bridge
BOOTPROTO=static
IPADDR=AA.BBB.CCC.DD
NETMASK=255.255.255.192
SCOPE="peer AA.BBB.CCC.1"
ONBOOT=yes
DELAY=0
Does anyone know what configuration should be done in CentOS guest?
Is there something wrong with what I've done published above?
Thank you so much for the help.