plan9fox/rc/bin/netaudit

#!/bin/rc
rfork e
fn checkhost {
	if(~ $sysname ''){
		echo 'sysname= env var is not set'
		exit 'fail'
	}
	echo 'checking this host''s tuple:'
	ip=`{ndb/query sys $sysname ip}
	if(~ $ip '')
		echo '	no ip= entry'
	if not
		echo '	ip='$ip 'looks ok'
	dom=`{ndb/query sys $sysname dom}
	if(~ $dom '')
		echo '	no dom= entry'
	if not if(! ~ $dom *.*)
		echo '	dom='$dom 'does not have a dot'
	if not if(! ~ $dom $sysname^.*)
		echo '	dom='$dom 'does not start with' $sysname^'; it''s supposed to be the FQDN, not the domain name!'
	if not
		echo '	dom='$dom 'looks ok'
	ether=`{ndb/query sys $sysname ether}
	if(~ $ether '')
		echo '	no ether entry'
	if not if(! ~ $ether [0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
		echo '	ether='$ether 'has wrong format'
	if not if(! grep -s $ether /net/ether*/addr)
		echo '	ether='$ether 'does not belong to any network interface'
	if not
		echo '	ether='$ether 'looks ok'
}
fn checknet {
	echo 'checking the network tuple:'
	ipnet=`{ndb/ipquery sys $sysname ipnet | sed 's/^ipnet=//'}
	if(~ $ipnet ''){
		echo '	we are not in an ipnet, so looking for entries in host tuple only'
	}
	if not
		echo '	we are in ipnet='^$ipnet
	ipgw=`{ndb/ipquery sys $sysname ipgw | sed 's/^ipgw=//'}
	if(~ $ipgw '' '::'){
		echo '	we do not have an internet gateway, no ipgw= entry'
	}
	if not {
		if(! ~ $ipgw *.*.*.* *:*:*:*:*:*:*:* *::*)
			echo '	ipgw='$ipgw 'does not look like an ip address'
		if not
			echo '	ipgw='$ipgw 'looks ok'
	}
	dns=`{ndb/ipquery sys $sysname dns | sed 's/^dns=//'}
	if(~ $dns '')
		echo '	no dns= entry'
	if not if(! ip/ping -n 1 $dns >/dev/null >[2=1])
		echo '	dns='$dns 'does not reply to ping'
	if not
		echo '	dns='$dns 'looks ok'
	auth=`{ndb/ipquery sys $sysname auth | sed 's/^auth=//'}
	if(~ $auth '')
		echo '	no auth= entry'
	if not if(! ip/ping -n 1 $auth >/dev/null >[2=1])
		echo '	auth='$auth 'does not reply to ping'
	if not {
		authok=1
		echo '	auth='$auth 'looks ok'
	}
}
fn checkauth {
	echo 'checking auth server configuration:'
	if(~ $auth ''){
		echo '	no auth server'
		exit fail
	}
	if not if(~ $auth $sysname){
		echo '	we are the auth server'
		authisus=1
	}
	if not if(~ $auth $dom){
		echo '	we are the auth server'
		authisus=1
	}
	if not if(~ $auth $ip){
		echo '	we are the auth server'
		authisus=1
	}
	if not {
		echo '	we are not the auth server '^$auth
		echo '	if this is a mistake, set auth='$sysname' or auth='$dom
		if(~ $authok 1)
			echo '	run auth/debug to test the auth server'
	}
	if(~ $authisus 1){
		if(! grep -s keyfs <{ps})
			echo '	auth/keyfs is not running, try reboot'
		if not
			echo '	auth/keyfs is running'
		if(! grep -s 'Listen *567' <{netstat -n})
			echo '	no one listening on port 567, try reboot'
		if not {
			echo '	someone is listening on port 567'
			echo '	run auth/debug to test the auth server'
		}
	}

}
fn checksec {
	echo 'checking basic security:'
	if(@{rfork n; mount -n /srv/boot /root >/dev/null >[2=1]})
		echo '	file server does not require auth for user '^`{cat '#c'/user}
	if not
		echo '	file server seems to require auth'
}
checkhost
checknet
checkauth
#checksec