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Note the long UA is malformed. It repeats itself; plus there's no space after the comma when it does (525.13,Mozilla).I've also just seen that malformed UA from:
Considering the number of IPs they own it's a ludicrous situation engendered, I suspect, by lazinessI came across a discussion in which an IT guy needed to configure their office firewall to allow access to Google Translator except that the IP address kept changing. A Google employee replied that they use a "relatively small" set of IP addresses for "various load balancing reasons" and that the IT guy should manually create and maintain their own "small set" of Google translator IP addresses.