GutoVeronezi commented on pull request #5532:
URL: https://github.com/apache/cloudstack/pull/5532#issuecomment-930530135
@weizhouapache
> which cloudstack version are you testing with ?
4.15.0.0
> could you please tell how to reproduce the issue ?
1. Create a VPC;
2. Observe VR's `iptables` (use `iptables-save | grep SNAT`);
3. Add public IPs to the VPC and assigned functions (`static NAT`, `port
forwarding`...) to them;
- Before the changes:
4. Every public IP will turn into a `source NAT`, i.e.:
```
-A POSTROUTING -s 10.0.0.0/24 -d 10.0.0.247/32 -o eth2 -j SNAT --to-source
10.0.0.1
-A POSTROUTING -s 10.0.0.247/32 -o eth1 -j SNAT --to-source 192.168.100.96
-A POSTROUTING -o eth1 -j SNAT --to-source 192.168.100.52
-A POSTROUTING -o eth1 -j SNAT --to-source 192.168.100.96
```
- After the changes:
4. Only `source NAT` IP is `source NAT`, others IPs will have only the
real function to which they were assigned.
```
-A POSTROUTING -s 10.0.0.0/24 -d 10.0.0.247/32 -o eth2 -j SNAT --to-source
10.0.0.1
-A POSTROUTING -s 10.0.0.247/32 -o eth1 -j SNAT --to-source 192.168.100.96
-A POSTROUTING -o eth1 -j SNAT --to-source 192.168.100.52
```
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