diff --git a/src/Fox_Debian_99_Sysctl.conf b/src/Fox_Debian_99_Sysctl.conf
new file mode 100644
index 0000000..85e1eda
--- /dev/null
+++ b/src/Fox_Debian_99_Sysctl.conf
@@ -0,0 +1,24 @@
+# This configuration file is customized by fox
+# Optimize system parameters
+
+kernel.panic = 20
+kernel.panic_on_oops = 1
+
+net.core.default_qdisc = fq_codel
+net.ipv4.tcp_congestion_control = bbr
+
+# Other adjustable system parameters
+
+net.ipv4.conf.all.log_martians = 1
+
+net.ipv4.icmp_ratelimit = 100
+net.ipv4.igmp_max_memberships = 100
+
+net.ipv4.tcp_fin_timeout = 30
+net.ipv4.tcp_keepalive_time = 120
+net.ipv4.tcp_max_orphans = 4096
+net.ipv4.tcp_max_tw_buckets = 4096
+net.ipv4.tcp_syncookies = 1
+
+net.ipv6.conf.all.use_tempaddr = 0
+net.ipv6.conf.default.use_tempaddr = 0