Failed to parse IP address [unknown] in X-Forwarded-for header

[IanD]

Hi,

We use CloudFlare to protect our website but recently I have noticed some errors in the error.log:

2015-02-04 11:51:49.903 [INFO] [141.101.99.193:48850-0] Failed to parse IP address [unknown] in X-Forwarded-for header, use original IP
2015-02-04 11:51:52.058 [INFO] [108.162.210.137:53696-0] Failed to parse IP address [unknown] in X-Forwarded-for header, use original IP
2015-02-04 11:51:53.313 [INFO] [141.101.99.193:65382-0] Failed to parse IP address [unknown] in X-Forwarded-for header, use original IP

How can we debug this?

Would this be a problem with CloudFlare not sending the X-Forwarded-for header or could it be a problem with LiteSpeed?

Thanks,

Ian

 

[mistwang]

I think CloudFlare send

X-Forwarded-For: unknown

header to us.

 

[IanD]

Yes - I think now it is to do with IP v6 and probably not related to LiteSpeed.

Thanks.