ScreenOS Firewalls (NOT SRX)
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Contributor
anabiosis
Posts: 16
Registered: ‎12-22-2009
0

SSG + DHCP on VLAN issues

Hello all, having an issue with DHCP over subinterfaces I'm hoping someone can point out the fix for.

I have three vlans created

 

set interface ethernet0/2.1 ip 10.20.2.1/24
set interface ethernet0/2.1 route
set interface ethernet0/2.2 ip 10.15.2.1/24
set interface ethernet0/2.2 route
set interface ethernet0/2.3 ip 10.10.5.1/24
set interface ethernet0/2.3 route

These are the pools:

set ippool "Data" 10.20.2.30 10.3.2.150
set ippool "Voice" 10.15.2.30 10.2.2.150
set ippool "NetOnly" 10.10.2.30 10.5.5.75

Here are their tags...

set interface "ethernet0/2.1" tag 20 zone "Trust"
set interface "ethernet0/2.2" tag 25 zone "Trust"
set interface "ethernet0/2.3" tag 30 zone "Untrust"

No device is getting DHCP when I plug them in no matter what I do. I'm aware that older versions of ScreenOS didn't do subinterface DHCP servers. What gives on my config?

myssg-> get system | in soft
Software Version: 6.3.0r4.0, Type: Firewall+VPN

Config:

unset key protection enable
set clock timezone 0
set vrouter trust-vr sharable
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset auto-route-export
exit
unset alg sip enable
set alg appleichat enable
unset alg appleichat re-assembly enable
set alg sctp enable
set auth-server "Local" id 0
set auth-server "Local" server-name "Local"
set auth default auth server "Local"
set auth radius accounting port 1646
set admin name "myssg"
set admin password "nAzXXXXXXXXXXpnMBsFEBEDtQqIhTn"
set admin manager-ip 172.16.32.201
set admin auth web timeout 10
set admin auth dial-in timeout 3
set admin auth server "Local"
set admin format dos
set zone "Trust" vrouter "trust-vr"
set zone "Untrust" vrouter "trust-vr"
set zone "DMZ" vrouter "trust-vr"
set zone "VLAN" vrouter "trust-vr"
set zone "Untrust-Tun" vrouter "trust-vr"
set zone "Trust" tcp-rst
set zone "Untrust" block
unset zone "Untrust" tcp-rst
set zone "MGT" block
unset zone "V1-Trust" tcp-rst
unset zone "V1-Untrust" tcp-rst
set zone "DMZ" tcp-rst
unset zone "V1-DMZ" tcp-rst
unset zone "VLAN" tcp-rst
set zone "Untrust" screen tear-drop
set zone "Untrust" screen syn-flood
set zone "Untrust" screen ping-death
set zone "Untrust" screen ip-filter-src
set zone "Untrust" screen land
set zone "V1-Untrust" screen tear-drop
set zone "V1-Untrust" screen syn-flood
set zone "V1-Untrust" screen ping-death
set zone "V1-Untrust" screen ip-filter-src
set zone "V1-Untrust" screen land
set interface "ethernet0/0" zone "Untrust"
set interface "ethernet0/1" zone "DMZ"
set interface "ethernet0/2.1" tag 20 zone "Trust"
set interface "ethernet0/2.2" tag 25 zone "Trust"
set interface "ethernet0/2.3" tag 30 zone "Untrust"
set interface "bgroup0" zone "Trust"
set interface bgroup0 port ethernet0/3
set interface bgroup0 port ethernet0/4
set interface bgroup0 port ethernet0/5
set interface bgroup0 port ethernet0/6
unset interface vlan1 ip
set interface ethernet0/0 ip xxx.xxx.xxx./32
set interface ethernet0/0 nat
set interface ethernet0/2.1 ip 10.20.2.1/24
set interface ethernet0/2.1 route
set interface ethernet0/2.2 ip 10.15.2.1/24
set interface ethernet0/2.2 route
set interface ethernet0/2.3 ip 10.10.5.1/24
set interface ethernet0/2.3 route
set interface ethernet0/2.1 mtu 1500
set interface ethernet0/2.2 mtu 1500
set interface ethernet0/2.3 mtu 1500
unset interface vlan1 bypass-others-ipsec
unset interface vlan1 bypass-non-ip
set interface ethernet0/0 ip manageable
set interface ethernet0/2.1 ip manageable
set interface ethernet0/2.2 ip manageable
set interface ethernet0/2.3 ip manageable
set interface ethernet0/0 manage ping
set interface ethernet0/0 manage ssh
set interface ethernet0/0 manage telnet
set interface ethernet0/0 manage snmp
set interface ethernet0/0 manage ssl
set interface ethernet0/0 manage web
set interface ethernet0/0 manage mtrace
unset interface ethernet0/2.1 manage telnet
unset interface ethernet0/2.1 manage ssl
unset interface ethernet0/2.2 manage telnet
unset interface ethernet0/2.2 manage snmp
unset interface ethernet0/2.2 manage ssl
set interface ethernet0/2.3 manage ping
set interface ethernet0/2.3 manage ssh
set interface ethernet0/2.3 manage snmp
set interface ethernet0/2.3 manage web
set interface bgroup0 manage mtrace
set interface ethernet0/1 dhcp client enable
set interface ethernet0/2.1 dhcp server service
set interface ethernet0/2.2 dhcp server service
set interface ethernet0/2.3 dhcp server service
set interface ethernet0/2.1 dhcp server auto
set interface ethernet0/2.2 dhcp server auto
set interface ethernet0/2.3 dhcp server auto
set interface ethernet0/2.1 dhcp server option lease 1440000
set interface ethernet0/2.2 dhcp server option lease 1440000
set interface ethernet0/2.3 dhcp server option lease 1440000
unset interface ethernet0/2.1 dhcp server config next-server-ip
unset interface ethernet0/2.2 dhcp server config next-server-ip
unset interface ethernet0/2.2 dhcp server config updatable
unset interface ethernet0/2.3 dhcp server config next-server-ip
unset interface ethernet0/2.3 dhcp server config updatable
set interface "serial0/0" modem settings "USR" init "AT&F"
set interface "serial0/0" modem settings "USR" active
set interface "serial0/0" modem speed 115200
set interface "serial0/0" modem retry 3
set interface "serial0/0" modem interval 10
set interface "serial0/0" modem idle-time 10
set flow tcp-mss
unset flow no-tcp-seq-check
set flow tcp-syn-check
unset flow tcp-syn-bit-check
set flow reverse-route clear-text prefer
set flow reverse-route tunnel always
set hostname difjuncan
set pki authority default scep mode "auto"
set pki x509 default cert-path partial
set ippool "Data" 10.20.2.30 10.3.2.150
set ippool "Voice" 10.15.2.30 10.2.2.150
set ippool "NetOnly" 10.10.2.30 10.5.5.75
set crypto-policy
exit
set ike respond-bad-spi 1
set ike ikev2 ike-sa-soft-lifetime 60
unset ike ikeid-enumeration
unset ike dos-protection
unset ipsec access-session enable
set ipsec access-session maximum 5000
set ipsec access-session upper-threshold 0
set ipsec access-session lower-threshold 0
set ipsec access-session dead-p2-sa-timeout 0
unset ipsec access-session log-error
unset ipsec access-session info-exch-connected
unset ipsec access-session use-error-log
set url protocol websense
exit
set policy id 1 from "Trust" to "Untrust"  "Any" "Any" "ANY" permit
set policy id 1
exit
set nsmgmt bulkcli reboot-timeout 60
set ssh version v2
set ssh enable
set config lock timeout 5
unset license-key auto-update
set telnet client enable
set snmp port listen 161
set snmp port trap 162
set snmpv3 local-engine id "016211200900XXXX"
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset add-default-route
set route 0.0.0.0/0 interface ethernet0/0 gateway xxx.xxx.xxx.xxx
exit
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit

Distinguished Expert
spuluka
Posts: 2,608
Registered: ‎03-30-2009
0

Re: SSG + DHCP on VLAN issues

You appear to be missing the dhcp options for each of your server segments.  You'll need to configure these for each of the server segments on the subinterfaces:


set interface ethernet0/2.1 dhcp server option gateway 10.20.2.1
set interface ethernet0/2.1 dhcp server option netmask 255.255.255.0
set interface ethernet0/2.1 dhcp server option domainname company.com
set interface ethernet0/2.1 dhcp server option dns1 x.x.x.x
set interface ethernet0/2.1 dhcp server option dns2 x.x.x.x

Also the dhcp pools are not ippools.  Remove those and set these instead

set interface ethernet0/2.1 dhcp server ip 10.20.2.30 to 10.3.2.150

I think the rest is right as it is.

Steve Puluka BSEET
Juniper Ambassador
Senior Network Engineer - UPMC Pittsburgh, PA
JNCIA-ER JNCIA-EX JNCIS-SEC JNCIP-SEC
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MCP - Managing Server 2003 MCP - Windows XP Professional
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http://puluka.com/home
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