UDP DDoS has pattern of flooding game server with
random source IP and UDP with random payload. game
server UDP traffic requires certain payload
pattern, so this XDP program can serve as example
to stop UDP DDoS attack with UDP payload that does not
match game UDP traffic payload pattern.
without UDP DDoS protection, under DDoS attack:
BPFire UI RED Traffic: in 9xx Mbit/s.
with UDP DDoS protection, under DDoS attack:
BPFire UI RED Traffic: in 1xx Mbit/s.
Tested-by: Muhammad Haikal <eykalpirates@gmail.com>
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
XDP generated SYNACK tcp options with window
scaling and timestamp could intermittently cause
small packet transmission on DDoS protected server.
allow user to disable window scaling when such
problem occurs. see [0]
[0]: https://github.com/vincentmli/xdp-tools/issues/7
Reported-by: DNSPROXY.ORG LLC <dnsproxyorg@gmail.com>
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
When XDP DDoS syncookie program is attached
to red0 interface, green network client internet
connection to website like gmail/youtube... failed.
it is because these sites does not have IP DF flag
set for each tcp packet, and syncookie_xdp program
would drop these packets when they arrived at red0
interface.
see https://github.com/vincentmli/BPFire/issues/59
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
switch xdp_sni.bpf.o LPM trie map to hash map
to reduce code complexity and avoid verifier error
now need to add domain and its sub domain to hash
map to block each domain and its sub domain site.
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
add XDP TLS SNI logging with bpf ringbuf
drop xdp_sni.bpf.o reverse_string due to
bpf verifier complaining program is too large.
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
domain name in xdp_dns.bpf.o not reversed properly
result in domain name mismatch with domain inserted
from user space xdp_dns
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
XDP dns rate limit program has static tail call
which requires revert xdp-tool commit:
(039bdea "xdp-loader: Only load the BPF program we need from object files")
XDP dns rate limit program also uses bpf_printk helper which is not
supported on FireBeeOS since kernel CONFIG_BPF_EVENTS which allows user
to do kprobe, uprobe, tracepoint is not enabled, so bpf_printk helper is
not available, so removed bpf_printk
see discussion in [0] xdp-loader load xdp program with bpf tail call result in Bad file descriptor(-9)
[0] https://github.com/xdp-project/xdp-tools/issues/377
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
