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DDoS Protection · Editorial review

X4B review: remote DDoS filtering from $10 a month

x4b.net

X4B sells DDoS protection only, placed in front of a site hosted elsewhere, from $10 a month. You connect through a reverse proxy or a GRE or IPIP tunnel without your own ASN.

Standalone DDoS filterKeep your current hostGRE and IPIP tunnelsReverse proxyTCP and UDP coveredHourly billingAustralia

Our verdict on X4B

For a US adult site that wants to keep its current host, X4B adds a filtering layer for a few dozen dollars a month, with scrubbing in New York, Las Vegas, Ashburn, Chicago, Dallas and Los Angeles.

Two caveats: X4B can hand account data to law enforcement on written request without telling you, and its own “Reality Check” warns that an extreme attack may leave your site partly reachable or shut down.

X4B home page offering its free DDoS mitigation trial
X4B

X4B tiers and prices

  • Budget: single-homed, New York, Las Vegas and Switzerland, from $10 for 50 GB of clean traffic to $155 for 40 TB.
  • Standard: anycast, six cities including Ashburn, Chicago, Dallas and Los Angeles, from $20 to $420 for 96 TB.
  • Premium: anycast, nine cities adding Tokyo, Brazil and Australia, from $30 to $545 for 96 TB.

Hourly billing starts at 2 cents an hour plus clean traffic per GB on Budget. Prices exclude Australian GST, which applies only to Australian customers. A free trial requires a $1 deposit via PayPal.

How X4B connects to your server

Traffic hits X4B first, attacks are filtered, and clean traffic reaches your server through a reverse proxy, which works on any platform, or a GRE or IPIP tunnel, which needs no ASN or IP block of your own. Protection covers layers 3 to 7 for anything speaking TCP or UDP: websites, file transfer, game servers, mail. HTTPS works with your certificate or one generated by X4B, with HTTP/2 and GZIP. X4B hosts nothing itself.

X4B terms worth knowing

No cancelled service is refunded, and Bitcoin payments never are. Premium bandwidth is fair use at 0.5 Mbps under $30 a month and 1 Mbps above, with overage up to $17 per Mbps. The terms let X4B disclose account details, IP addresses and history to any law enforcement agent who asks in writing, without notifying you.

X4B strengths and limitations

Strengths

  • Protection from $10 a month.
  • No ASN or IP block needed.
  • Hourly billing available.

Limitations

  • Disclosure to law enforcement without notice.
  • No refunds.

X4B vs Sharktech

Sharktech bundles DDoS protection with its own hosting, dedicated servers from $219 a month with 300 TB of traffic. X4B is the cheaper choice when you want to stay with your current host.

Psychz Networks

Psychz Networks, run by Profuse Solutions in Los Angeles, protects sites hosted elsewhere from $399 a month, with a reverse proxy option.

Read the review Psychz Networks →Sharktech

Sharktech, a Las Vegas host since 2003, runs five data centers in Los Angeles, Las Vegas, Denver, Chicago and Amsterdam.

Read the review Sharktech →
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