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- --- a/net/netfilter/nf_conntrack_proto_tcp.c
- +++ b/net/netfilter/nf_conntrack_proto_tcp.c
- @@ -33,6 +33,9 @@
- #include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
- #include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
-
- +/* Do not check the TCP window for incoming packets */
- +static int nf_ct_tcp_no_window_check __read_mostly = 1;
- +
- /* "Be conservative in what you do,
- be liberal in what you accept from others."
- If it's non-zero, we mark only out of window RST segments as INVALID. */
- @@ -515,6 +518,9 @@ static bool tcp_in_window(const struct n
- s32 receiver_offset;
- bool res, in_recv_win;
-
- + if (nf_ct_tcp_no_window_check)
- + return true;
- +
- /*
- * Get the required data from the packet.
- */
- @@ -1481,6 +1487,13 @@ static struct ctl_table tcp_sysctl_table
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- + {
- + .procname = "nf_conntrack_tcp_no_window_check",
- + .data = &nf_ct_tcp_no_window_check,
- + .maxlen = sizeof(unsigned int),
- + .mode = 0644,
- + .proc_handler = proc_dointvec,
- + },
- { }
- };
-
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