Forum Discussion
f5gurunot
Cirrus
CirrusTCP Option 28 X-Forwarded-For Header
Using Akamai for DDOS mitigation and the requests sent to us show Akamai IP instead of the Client IP. I have enabled TCP Option 28 and trying to insert the Client IP into X-Forwarded-For header. I ...
when CLIENT_DATA {
set opt28 [TCP::option get 28]
if { [string length $opt28] == 4 } {
binary scan $opt28 H8 addr
scan $addr "%2x%2x%2x%2x" ip1 ip2 ip3 ip4
set optaddr "$ip1.$ip2.$ip3.$ip4"
log local0. "optaddr is $optaddr"
log local0. "ip addr parse result is [IP::addr parse -ipv4 $opt28]"
}
}
