What Anti-Fraud Measures Do You Use

Sep 30, 2009

Over the past number of years there has been an obvious increase in credit card fraud and identity theft.

Our policies have always tried to stay a step ahead but it seems no matter what is done the occasional fraudster manages to squeeze through, costing us a lot of money. At one some point in early 2009, it got as bad as 60% of the orders we received. It ended up eating a LOT of our time just to go through each order and verify them as best we could.

What methods do you use to fight fraud?

I'll start with some of the things we do.

- Require CVV code on the credit card
- We call the customer's telephone number and verify with them. - Verify the telephone number matches the region of the address they provide
- Require the CC issuing Bank's name and number
- We often require the customer to fax a signed credit card authorization form
- GeoIP matches location of the address in the order

Obviously the big challenge is proving that the person placing the order is the actual owner of the card. I've received the correct CVV, spoken with the customer on the phone number, had the phone number match the region... non-US so I wasn't able to verify their telephone details with the issuing bank. Had the GeoIP match and still found out it was fraud.

On a side note: Am I the only one that feels banks and those issuing credit cards need to take more responsibility for a system that's clearly broken? Even after going through the process above, it can still be fraud with a chargeback issued. In those cases, the company loses the money they made, pay a fee to the payment provider, lost time for Sales Reps and Tech Reps, and of course they lose money on hardware, electricity and bandwidth.

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Anti-Fraud System Of Vpsland.com

Sep 21, 2008

When I order, I have input all correct info.I always get these warning:
"Rejected by the Anti-Fraud System. Please contact Technical Support Team."

these guys spent a lot on adwords, but when i click on the AD, i have no way to order!

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I've already set:

...in the antidos configuration file but I'm still seeing more and more legit IPs getting added to ad.rules. I've read that raising or lowering LN="100" is the other tweak I should try, but there simply is no such value defined in my conf.antidos file.

Another thing I noticed that, although I only got two notification mails telling me about "attackers" blocked by antidos, there are roughly 40 entries in ad.rules. As a matter of fact, I don't understand what antidos is doing there in the first place. Seems like iptables doesn't log to var/log/messages anyway, at least not on my machine - so where is antidos getting those ips from?

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Jan 26, 2008

I am renting a cheap Linux server merely to test and learn as much as possible.

The server itself is completely unsecured, as I am doing everything one at a time to learn as much as possible.

Now, a few days ago I noticed someone with a US based IP had logged into my root account. The bash log mentioned something about some network commands and I traced the IPs to my server datacenter, so no big deal I thought, but I changed the root password anyways.

Today it happened again, but this time the bash log was cleared, and in my /var/www/html folder I found a suspicious folder with eBaywhateverapi.dll in it. I deleted it, seeing as this was not normal, which led me to the conclusion my server was hacked. Since it's a cheap test server, it's no loss at all, I'm just glad it's not the server I use for my customers!

So, what I did now was this:

Removed all suspicious folders in /home
Turned off root login (made a new account which I use to su into root)
Changed the SSH port
Changed root password

Will this be enough for now, or should I do anything else?

I'm running CentOS 4

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Jan 20, 2008

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I've got APF, BFD and restricted root SSH access. Is there anything else?

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I got like 3 orders today for domain elixshop.com from different guy name , 2 different email ids, and maxmind fraud reject all the 3 orders for high security risk, checked domaintools and guess what it says "France" as the location of use "Pending cancellation due to non-payment" , trying to order from various states in US

Address used 1 :
City: Farmington Hills
State: MI

Address used 2 :
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I will try to contact the person and lets see how it goes, but why do people try their luck with fraud.

It might not be legit fraud but wait... someone just signed up brb...

It was him again, now from Lebanon , in US

Edit other update, seems like few weeks back this domain : intourgold.com was also marked fraud by system from same dude . Anyone here can tell how to stop the users like these and showing them page not found error

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Are they real people or should I go for a chargeback?

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Could this be due to the recent Network Solutions breach? I've never seen so many fraudulent orders with nearly everything checking out.

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I've gone ahead and blocked the ips, but I just wanted to let you guys know.

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With chargeback fees so high I'd really like to minimize fraud without tossing legit orders.

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Jun 12, 2007

One of my potential client is getting DDOS occassionally. According to the DCs-PCCW and Singtel, the attacks come from China mainly and the DDOS used up all the available bandwidth.

I have asked many DC in Hong Kong. Most of them said they will only null route their IPs and wait the DDOS gone. It seems that none of the DC in HK offer any sort of Anti-DDOS solution.

My client don't want their site completely offline every time they got attacked. So, could any professional suggest what we can do?

What I am thinking of is:
1. Getting 2 connection from different bandwidth providers
2. Using Geo DNS: [url]

Then, I can separate all China users by forcing them to use 1 connection. Will this work? Is there any potential problem here?

Also, I am also thinking of using BGP. Will that make us partially visible as well?

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I think its ratter old and it doesnt work for anything these days. Why do hosts still run it? And why isnt there a better alternative?

I used Deflate some years ago and I got problems. And tried then after some years again and nothing changed, the same basic old script which counts connections and ban IPs.

The think with Deflate is that if you have a high limit, lets say ban with 150 connections per IPs, its absolutely worthless for attacks, since you are letting already 150 connections per IP.

And if you lower it at least me got with tons of problems banning real visitors. Even over 150 I had complaints about real visitors on a server telling the server blocks him. Dont ask me how someone has 150 connections to a servers but I got complaints from multiples people over the world the 1 month i had it running over a 2 years ago.

I also see a really big problem with it. Allot of ISP share IPs between users. So its really possible you get 200 connections from the same IP and they are different users. Banning an IP based on the connections you can probably shutdown a full IPS and their visitors. I wish there was a better solution but using a high value like 300 or 500 doesnt make sense in a Dos attack. And if you use a low value you start to get into problems.

We agree it will not work with distributed attacks but I dont think it can even work with single attacks since besides connection count it doesnt seem to be any more analisys behaviour.

The way I would make a script like that. Is to check all traffic and IPS all the time. And mark IPs that always access a server ass good ones. The newer the IP the more suspicious. On a attack this way real visitors would still pass but attackers will not as they are new ips. You can also match then the number of times its connecting, how long, etc.

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I contacted the guys at ProxyShield and they want $1244 a month to route the traffic for us. That's a bit high for someone with a small business not making more than $500 a week online. EDIT: Just got back in touch with them and the $1244 is only for 20mb if you need 100mb it's $2400! that's just insane for a small business.

My question to you guys is who can host us or what services can I use to get rid of these ddos attacks? The Planet has horrible support and I'm not sure where to go or look. Unless we sit at the computer and block every inbound attack all day we simply can't beat it.

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