Script to allow selective connection on reboot

[sbsmbm]

Hello there!
I have on average 12 connected devices to my rt-Ac68u running merlin's 384.15 - which requires reboot at-least once a week (also trying to figure out why, details in my other post).

What i'd like to know & get help on is a script that can run on reboot and only allow 2 devices to connect immediately (i've assigned ip to my laptop and phone) and the rest can connect say 10mins after thereby allowing the router to settle down after the reboot.

Thanks in advance

 

[Martineau]

What i'd like to know & get help on is a script that can run on reboot and only allow 2 devices to connect immediately (i've assigned ip to my laptop and phone) and the rest can connect say 10mins after thereby allowing the router to settle down after the reboot.

For a small number of identified devices - you have approx. 10? (plus the laptop and phone that will be exempt), you could define their MACs to ensure that they do not get DHCP assignment:

/jffs/configs/dnsmasq.conf.add

dhcp-host=ba:ad:ba:ad:ba:d1,ignore
dhcp-host=ba:ad:ba:ad:ba:d2,ignore

etc.

and to disable the DHCP ignore directives when appropriate

/jffs/scripts/dnsmasq.postconf

#!/bin/sh

UPSECS="$(grep -o '^[0-9]\+' /proc/uptime)"      # or parse the output of 'uptime'
UPMINS=$((UPSECS / 60))

[ $UPMINS -gt 10 ] && sed  's/^dhcp-host.*ignore/#&/' /etc/dnsmasq.conf

So now if you create a cron job to execute 10 minutes after the BOOT

/jffs/scripts/init-start

#!/bin/sh

HH=${TIME:0:2};MM=${TIME:3:2}
cru a DHCPWait "$MM $HH * * *" /jffs/scripts/AllowDHCP.sh

/jffs/scripts/AllowDHCP.sh

#!/bin/sh

service restart_dnsmasq
cru d DHCPWait

it might be a crude solution?