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Dhcpd lease time (view source)

Revision as of 20:20, 4 December 2013

1,840 bytes added ,  20:20, 4 December 2013
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{{Needs review}}
 
{{Needs review}}
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You can customize the lease duration for the dhcp server ('''dhcpd''') in SME using these instructions.
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== Display the dhcpd lease==
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according in [[bugzilla:2641]] you have a script which display in your terminal how many computers are connected their ip, mac adress and their expiration of dhcp leases.
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nano dhcpd.lease
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paste the content below then save the file
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chmod +x dhcpd.lease
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#!/bin/sh
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#
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# dhcpactiv.sh
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#
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# v.004
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# - rewritten again to pull data from dhcpd files according to labels instead of position
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#
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# v.003
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# - add code to remove tstp information from dpcpd.leases
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#
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# v.002
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# - rewritten to use awk more for parsing
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# - added "GMT" indicator to Expiration col head
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#
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echo "Source        Host      MAC Address      IP Address      Expiration (GMT)"
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echo "============= ========== ================= =============== ================"
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#
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awk ' { out = ""} \
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      { $1=="lease"||$1=="client-hostname" ? out=" " $2 : out=out } \
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      { $1=="binding"||$1=="hardware" ? out= " " $3: out=out } \
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      { $1=="ends"? out=" " $3 " " $4: out=out } \
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      { $1=="}"? out="\n": out=out } \
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      { printf out," " }' /var/lib/dhcpd/dhcpd.leases \
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  | grep active \
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  | sed -e s/'[{};" ]'/\ /g  \
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  | awk '{ printf "%-13s %-10s %-17s %-15s %-10s %-5s\n", "dhcpd.leases", $6, $5, $1, $2, $3 }'
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#
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# Now do the same for /etc/dhcpd.conf
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#
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awk ' { out = ""}
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      { $1=="host"||$1=="fixed-address" ? out=" " $2 : out=out } \
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      { $1=="hardware" ? out= " " $3: out=out } \
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      { $1=="}"? out="\n": out=out } \
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      { printf out," " }' /etc/dhcpd.conf \
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  | grep : \
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  | sed -e  s/'[{};\" ]'/\ /g -e  s/\.`config get DomainName`// \
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  | awk  '{ printf "%-13s %-10s %-17s %-15s %-15s \n", "dhcpd.conf", $1, $2, $3, "reservation"}'
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#
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# Finally, grab the current arp table
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#
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arp -a \
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  |  sed -e s/\\..*\(/\ / -e s/\)// \
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  |  awk '{ printf "%-13s %-10s %-17s %-15s %-15s \n", "arp", $1, $4, $2, "n/a"}'
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== Create custom template fragments ==
 
== Create custom template fragments ==
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You can customize the lease duration for the dhcp server ('''dhcpd''') in SME using these instructions.
 
The commands below will create custom template fragments for <tt>default-lease-time</tt> and <tt>max-lease-time</tt>, re-generate <tt>/etc/dhcpd.conf</tt>, and restart the '''dhcpd''' service in order to activate your changes.
 
The commands below will create custom template fragments for <tt>default-lease-time</tt> and <tt>max-lease-time</tt>, re-generate <tt>/etc/dhcpd.conf</tt>, and restart the '''dhcpd''' service in order to activate your changes.
 
  mkdir -p /etc/e-smith/templates-custom/etc/dhcpd.conf
 
  mkdir -p /etc/e-smith/templates-custom/etc/dhcpd.conf
Retrieved from "https://wiki.koozali.org/Special:MobileDiff/22570"

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