Github user ustcweizhou commented on the issue:
https://github.com/apache/cloudstack/pull/1743
in 4.9, ALL iptables rules will be saved in /tmp/rules.save
I think it is better to add the rules in
systemvm/patches/debian/config/opt/cloud/bin/cs/CsAddress.py
```
+ self.fw.append(["mangle", "front",
+ "-A POSTROUTING " +
+ "-p udp -m udp --dport 68 -j CHECKSUM
--checksum-fill"])
```
in fw_router and fw_vpcrouter
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
