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Hello, Are our servers still facing the overload issue? My replies to gluster-users ML are not getting delivered to the list. Regards, Ravi On 09/19/2017 10:03 PM, Michael Scherer
wrote:
Le samedi 16 septembre 2017 à 20:48 +0530, Nigel Babu a écrit :Hello folks, We have discovered that for the last few weeks our mailman server was used for a spam attack. The attacker would make use of the + feature offered by gmail and hotmail. If you send an email to example@xxxxxxxxxxx, example+foo@xxxxxxxxxxx, example+bar@xxxxxxxxxxx, it goes to the same inbox. We were constantly hit with requests to subscribe to a few inboxes. These requests overloaded our mail server so much that it gave up. We detected this failure because a postmortem email to gluster-infra@xxxxxxxxxxx bounced. Any emails sent to our mailman server may have been on hold for the last 24 hours or so. They should be processed now as your email provider re-attempts. For the moment, we've banned subscribing with an email address with a + in the name. If you are already subscribed to the lists with a + in your email address, you will continue to be able to use the lists. We're looking at banning the spam IP addresses from being able to hit the web interface at all. When we have a working alternative, we will look at removing the current ban of using + in address.So we have a alternative in place, I pushed a blacklist using mod_security and a few DNS blacklist: https://github.com/gluster/gluster.org_ansible_configuration/commit/2f4 c1b8feeae16e1d0b7d6073822a6786ed21ddeApologies for the outage and a big shout out to Michael for taking time out of his weekend to debug and fix the issue.Well, you can thanks the airport in Prague for being less interesting than a spammer attacking us. |
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