patch-2.1.16 linux/Documentation/networking/ip-sysctl.txt

• Lines: 95
• Date: Wed Dec 18 11:45:43 1996
• Orig file: v2.1.15/linux/Documentation/networking/ip-sysctl.txt
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.15/linux/Documentation/networking/ip-sysctl.txt linux/Documentation/networking/ip-sysctl.txt
@@ -0,0 +1,94 @@
+/proc/sys/net/ipv4/* variables:
+
+ip_forwarding - "SNMP" BOOLEAN
+	2 - disabled (default)
+	1 - enabled
+
+	This variable is special, its change resets all configuration
+	parameters to their default state (RFC1122 for hosts, RFC1812
+	for routers)
+
+ip_default_ttl - INTEGER
+	default 64
+
+ip_log_martians - BOOLEAN
+	log packets with strange or impossible addresses.
+	default TRUE (router)
+		FALSE (host)
+
+ip_accept_redirects - BOOLEAN
+	Accept ICMP redirect messages.
+	default TRUE (host)
+		FALSE (router)
+
+ip_secure_redirects - BOOLEAN
+	Accept ICMP redirect messages only for gateways,
+	listed in default gateway list.
+	default TRUE
+
+ip_addrmask_agent - BOOLEAN
+	Reply to ICMP ADDRESS MASK requests.
+	default TRUE (router)
+		FALSE (host)
+
+ip_rfc1620_redirects - BOOLEAN
+	Send(router) or accept(host) RFC1620 shared media redirects.
+	Overrides ip_secure_redirects.
+	default TRUE (should be FALSE for distributed version,
+		      but I use it...)
+
+ip_bootp_agent - BOOLEAN
+	Accept packets with source address of sort 0.b.c.d
+	and destined to this host, broadcast or multicast.
+	Such packets are silently ignored otherwise.
+
+	default FALSE
+
+ip_bootp_relay - BOOLEAN
+	Accept packets with source address 0.b.c.d destined
+	not to this host as local ones. It is supposed, that
+	BOOTP relay deamon will catch and forward such packets.
+
+	default FASLE
+	Not Implemented Yet.
+
+
+ip_source_route - BOOLEAN
+	Accept packets with SRR option.
+	default TRUE (router)
+		FALSE (host)
+
+
+ip_no_pmtu_disc - BOOLEAN
+	Disable Path MTU Discovery.
+	default FALSE
+
+ip_rfc1812_filter - INTEGER
+	2 - do source validation by reversed path, as specified in RFC1812
+	    Recommended option for single homed hosts and stub network
+	    routers. Could cause troubles for complicated (not loop free)
+	    networks running a slow unreliable protocol (sort of RIP),
+	    or using static routes.
+
+	1 - (DEFAULT) Weaker form of RP filtering: drop all the packets
+	    that look as sourced at a directly connected interface, but
+	    were input from another interface.
+	    
+	0 - No source validation. 
+
+	NOTE: do not disable this option! All BSD derived routing software
+	(sort of gated, routed etc. etc.) is confused by such packets,
+	even if they are valid.
+
+ip_fib_model - INTEGER
+	0 - (DEFAULT) Standard model. All routes are in class MAIN.
+	1 - default routes go to class DEFAULT. This mode should
+	    be very convenient for small ISPs making policy routing.
+	2 - RFC1812 compliant model.
+	    Interface routes are in class MAIN.
+	    Gateway routes are in class DEFAULT.
+
+
+
+Alexey Kuznetsov.
+kuznet@ms2.inr.ac.ru