Bonesi http does not ACK the SYN ACKs from victim , or does in bunches

[tbstad]

Have used bonesi on ubuntu 16.04 and other OS ok.
When trying to use on Ubuntu 20.04 server , bonesi does not normally answer syn acks coming back from victim when attacking with http.
Resets not sent either.
Looks like bonesi is listening , but bunching up the replies or just doing nothing.

[Markus-Go]

Can you please make sure that:

• nf_conntrack module is not loaded
• no firewall rules are set
• syn-cookies are disabled?

Thanks!

[tbstad]

Markus,
Not much should have changed since the 16.04 setup I use , unless there is some 20.04 defaults that have changed.
Just in case:

lsmod|grep conntrack ---> no results
sudo ufw status -- > status inactive
sudo iptables -S
-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
sysctl -n net.ipv4.tcp_syncookies ---> 0

Thanks for taking a look at this, I really like the tool!