Hello,
I have contracted a VPS with debian 11, with several additional public ips.
I have followed different tutorials to configure the additional ips, but I can't see them through the internet.

###############################################
source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth9999
iface eth9999 inet static
address 100.100.100.100/24
gateway 100.100.100.1
dns-nameservers 8.8.8.8 8.8.4.4
dns-search dnssearch.com

###############################################

I have added the following lines:

###############################################
auto eth9999:0
iface eth9999:0 inet static
address 200.200.200.200
###############################################

I have tried other configurations from different internet tutorials and I can't see the ips through the internet. the provider has told me that he has linked them to my vps.

Something I'm leaving out... I would appreciate your help

if you have curl installed , try :
# curl ifconfig.me

compare that output with ifconfig output on your server.


I don't know if address/cidr can be given in the config file, but I think you are missing the netmask in VLSI
add :
address x.x.x.x
netmask 255.255.255.0
gateway x.x.x.1
etc

Also check your firewall rules.