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Various wording and foratting fixes

This commit is contained in:
Michael Kerrisk 2005-06-15 13:26:36 +00:00
parent 5c45d5f543
commit 7ecc26f664
1 changed files with 78 additions and 53 deletions
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131
man7/ip.7
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@ -647,65 +647,18 @@ supports the sysctl interface to configure some global options. The sysctls
can be accessed by reading or writing the
.B /proc/sys/net/ipv4/*
files or using the
.\" FIXME As at 2.6.12, 14 Jun 2005, the following are undocumented:
.\" ip_queue_maxlen
.\" ip_conntrack_max
.BR sysctl (2)
interface.
.\"
.TP
.B ip_default_ttl
Set the default time-to-live value of outgoing packets. This can be changed
per socket with the
.I IP_TTL
option.
.\"
.TP
.B ip_forward
Enable IP forwarding with a boolean flag. IP forwarding can be also set on a
per interface basis.
.\"
.TP
.B ip_dynaddr
Enable dynamic socket address and masquerading entry rewriting on interface
address change. This is useful for dialup interface with changing IP addresses.
0 means no rewriting, 1 turns it on and 2 enables verbose mode.
.\"
.TP
.B ip_autoconfig
Not documented.
.\"
.TP
.B ip_local_port_range
Contains two integers that define the default local port range allocated to
sockets. Allocation starts with the first number and ends with the second number.
Note that these should not conflict with the ports used by masquerading (although
the case is handled). Also arbitary choices may cause problems with some
firewall packet filters that make assumptions about the local ports in use.
First number should be at least >1024, better >4096 to avoid clashes with well
known ports and to minimize firewall problems.
.\"
.TP
.B ip_no_pmtu_disc
If enabled, don't do Path MTU Discovery for TCP sockets by default. Path MTU
discovery may fail if misconfigured firewalls (that drop all ICMP packets) or
misconfigured interfaces (e.g., a point-to-point link where the both ends don't
agree on the MTU) are on the path. It is better to fix the broken routers on
the path than to turn off Path MTU Discovery globally, because not doing it
incurs a high cost to the network.
.\"
.TP
.BR ipfrag_high_thresh ", " ipfrag_low_thresh
If the amount of queued IP fragments reaches
.BR ipfrag_high_thresh ,
the queue
is pruned down to
.BR ipfrag_low_thresh .
Contains an integer with the number of
bytes.
.TP
.B ip_always_defrag
[New with Kernel 2.2.13; in earlier kernel version the feature was controlled
.B ip_always_defrag " (Boolean)"
[New with kernel 2.2.13; in earlier kernel version the feature was controlled
at compile time by the
.B CONFIG_IP_ALWAYS_DEFRAG
option]
option; this file is not present in 2.4.x and later]
When this boolean frag is enabled (not equal 0) incoming fragments
(parts of IP packets
@ -722,6 +675,78 @@ also has a large memory and CPU time cost.
This is automagically turned on when masquerading or transparent
proxying are configured.
.\"
.TP
.B ip_autoconfig
.\" FIXME:
Not documented.
.\"
.TP
.BR ip_default_ttl " (integer; default: 64)"
Set the default time-to-live value of outgoing packets. This can be changed
per socket with the
.I IP_TTL
option.
.\"
.TP
.BR ip_dynaddr " (Boolean; default: disabled)"
Enable dynamic socket address and masquerading entry rewriting on interface
address change. This is useful for dialup interface with changing IP addresses.
0 means no rewriting, 1 turns it on and 2 enables verbose mode.
.\"
.TP
.BR ip_forward " (Boolean; default: disabled)"
Enable IP forwarding with a boolean flag. IP forwarding can be also set on a
per interface basis.
.\"
.TP
.BR ip_local_port_range
Contains two integers that define the default local port range
allocated to sockets.
Allocation starts with the first number and ends with the second number.
Note that these should not conflict with the ports used by masquerading
(although the case is handled).
Also arbitary choices may cause problems with some firewall packet
filters that make assumptions about the local ports in use.
First number should be at least >1024, better >4096 to avoid clashes
with well known ports and to minimize firewall problems.
.\"
.TP
.BR ip_no_pmtu_disc " (Boolean; default: disabled)"
If enabled, don't do Path MTU Discovery for TCP sockets by default.
Path MTU discovery may fail if misconfigured firewalls (that drop
all ICMP packets) or misconfigured interfaces (e.g., a point-to-point
link where the both ends don't agree on the MTU) are on the path.
It is better to fix the broken routers on the path than to turn off
Path MTU Discovery globally, because not doing it incurs a high cost
to the network.
.\"
.\" The following is from 2.6.12: Doumentation/networking/ip-sysctl.txt
.TP
.BR ip_nonlocal_bind " (Boolean; default: disabled)"
If set, allows processes to bind() to non-local IP addresses,
which can be quite useful - but may break some applications.
.\"
.\" The following is from 2.6.12: Doumentation/networking/ip-sysctl.txt
.TP
.BR ip6frag_time " (integer; default 30)"
Time in seconds to keep an IPv6 fragment in memory.
.\"
.\" The following is from 2.6.12: Doumentation/networking/ip-sysctl.txt
.TP
.BR ip6frag_secret_interval " (integer; default 600)"
Regeneration interval (in seconds) of the hash secret (or lifetime
for the hash secret) for IPv6 fragments.
Default: 600
.TP
.BR ipfrag_high_thresh " (integer), " ipfrag_low_thresh " (integer)"
If the amount of queued IP fragments reaches
.BR ipfrag_high_thresh ,
the queue
is pruned down to
.BR ipfrag_low_thresh .
Contains an integer with the number of
bytes.
.TP
.B neigh/*
See