A question about virtual interface

KatrinAlec · 08-01-2023, 02:12 AM

yes, just like that.

you need to read up on iptables, that does firewall AND SNAT/DNAT

https://www.netfilter.org/documentat...T-HOWTO-6.html

nini09 · 08-02-2023, 08:30 PM

You should create non-zero VLAN interface, such as enp0s3:10.

Jason.nix · 08-05-2023, 02:53 AM

Quote:

Originally Posted by KatrinAlec

yes, just like that.

you need to read up on iptables, that does firewall AND SNAT/DNAT

https://www.netfilter.org/documentat...T-HOWTO-6.html

Hello,
Thank you so much for your reply.
You mean something like below:

Code:

# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.2.15  netmask 255.255.255.0  broadcast 10.0.2.255
        inet6 fe80::a00:27ff:feed:b47c  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:ed:b4:7c  txqueuelen 1000  (Ethernet)
        RX packets 12217  bytes 5488128 (5.2 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7809  bytes 1321293 (1.2 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s3:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.5.20  netmask 255.0.0.0  broadcast 10.255.255.255
        ether 08:00:27:ed:b4:7c  txqueuelen 1000  (Ethernet)
...

# iptables -t nat -A POSTROUTING -o enp0s3 -j SNAT --to 10.0.5.20

Then:

Code:

# ping -I enp0s3:0 google.com
ping: invalid source address: enp0s3:0

Jason.nix · 08-05-2023, 02:53 AM

Quote:

Originally Posted by nini09

You should create non-zero VLAN interface, such as enp0s3:10.

Hello,
Thank you for your reply.
How?

nini09 · 08-07-2023, 08:18 PM

> How?
How do you create enp0s3:0?
You use the command, vconfig add enp0s3 10.

Jason.nix · 08-09-2023, 12:57 PM

Quote:

Originally Posted by nini09

> How?
How do you create enp0s3:0?
You use the command, vconfig add enp0s3 10.

Hello,
Thank you for your reply.
I did:

Code:

# touch /etc/network/interfaces.d/ifcfg-enp0s3:0
# nano /etc/network/interfaces.d/ifcfg-enp0s3:0

auto enp0s3:0
iface enp0s3:0 inet static
address 10.0.5.20
netmask 255.255.255.0

nini09 · 08-09-2023, 08:13 PM

Change enp0s3:0 to enp0s3:10

Jason.nix · 08-20-2023, 01:22 AM

Quote:

Originally Posted by nini09

Change enp0s3:0 to enp0s3:10

Hello,
Thank you so much for your reply.
I did it, got the same result.

nini09 · 08-21-2023, 07:39 PM

What is output of command, 'ifconfig' and 'route'?