Re: Default Block rules

[Wido den Hollander]

On 2/8/21 9:14 AM, Hean Seng wrote:
> Hi
> 
> Is that possible to have default block rules for all the VM,  Default Block
> SMTP outbound port in iptables
> 

We did this by changing the security groups. Egress we only allow:

- TCP 21 and 22
- TCP 26-65534

This way VMs can connect to port 25 outbound and thus not send e-mail.

Wido

> 
> Thank you
>