Modifying rules for a given EC2 security group with Boto3

Question

I have recently been working on programatically adding and removing ingress rules to security groups on my EC2 server. However, I now seem to have hit a bit of a wall.

I would like to be able to modify existing rules through a python script, but I haven't been able to find any guidance on the Boto3 docs.

Is there any way in which this can be done?

Thanks

Solution 1

See Boto3:SecurityGroup

There is no API to modify a rule in SG. You have to revoke the rule first and then add the rule with the modified parameters using authorize. The link also has code snippets.

• authorize_egress()
• authorize_ingress()
• revoke_egress()
• revoke_ingress()

Solution 2

Seems like there are no way to modify security group rule. You have to delete the old one:

security_group.revoke_ingress(IpProtocol="tcp", CidrIp="0.0.0.0/0", FromPort=3306, ToPort=3306)

and add the new one:

security_group.authorize_ingress(IpProtocol="tcp",CidrIp="0.0.0.0/0",FromPort=3306,ToPort=3306)

Hope it help.

Comments

[User588233]

Yes, I've seen that method before, but I wondered if there was a cleaner way of modifying each rule. Thanks for your help though!