This patch prevents SYN+RST and SYN+FIN segments which arrive in the
LISTEN state from initiating a three-way handshake.
I'm not sure if it is correct, but it's better than nothing (so far, I
haven't seen any patch for this issue).
--- tcp_input.c 2002/10/25 08:45:20 1.1
+++ tcp_input.c 2002/10/25 08:49:21
@@ -3668,6 +3668,8 @@
case TCP_LISTEN:
if(th->ack)
return 1;
+ if(th->rst || th->fin)
+ goto discard;
if(th->syn) {
if(tp->af_specific->conn_request(sk, skb) < 0)
-
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This archive was generated by hypermail 2b29 : Thu Oct 31 2002 - 22:00:27 EST