Bugtraq mailing list archives
Linux 2.2.3 patch to prevent FIN/NULL/XMAS scans
From: taral () CYBERJUNKIE COM (Taral)
Date: Wed, 24 Mar 1999 16:20:56 -0600
--Boundary-=_nWlrBbmQBhCDarzOwKkYHIDdqSCD Content-Type: text/plain Content-Transfer-Encoding: quoted-printable This small patch prevents Linux machines from responding differently to a stealth scan for listening sockets. Very useful for those who would like = to run a secure shop. A printk() put in front of the changed line will allow log= ging of unusual packets. Enjoy! Taral --Boundary-=_nWlrBbmQBhCDarzOwKkYHIDdqSCD Content-Type: text/plain; name="tcp_input.c.patch" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename="tcp_input.c.patch" --- linux/net/ipv4/tcp_input.c.orig=09Tue Mar 23 16:10:22 1999 +++ linux/net/ipv4/tcp_input.c=09Tue Mar 23 16:41:34 1999 @@ -2052,7 +2052,7 @@ =09=09=09goto discard; =09=09} =09=09 -=09=09goto discard; +=09=09return 1; =09=09break; =20 =09case TCP_SYN_SENT: --Boundary-=_nWlrBbmQBhCDarzOwKkYHIDdqSCD--
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- Linux 2.2.3 patch to prevent FIN/NULL/XMAS scans Taral (Mar 24)
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- Re: X11R6 NetBSD Security Problem in.telnetd (Mar 21)