Screen OS

I'm a newbie to the firewall world, so apologies in advance...

 

I have one SSG5 (dynamic IP) and two SSG140s (static IPs) and three sites.  All devices are version 6.0.0r4.0.  I've been able to establish a simple route-based IPSEC VPN tunnel with pre-shared keys between the SSG5 and each SSG140 - but never at the same time.  The second SSG140 always shows the following error:

 

"Rejected an IKE packet on ethernet0/2 from x.x.x.x:500 to y.y.y.y:500 with cookies 1e2cd06510b756f7 and 0000000000000000 because An initial Phase 1 packet arrived from an unrecognized peer gateway."

 

Basically, I'm just cloning the working VPN configs in the VPNs>AutoKey Advanced>Gateway, VPNs>AutoKey IKE, Network>Routing>Destination, Network>Interface, andPolicy>Policies sections of the WebGui. These configs work alone, but not in tandem.  Any thoughts?

 

Thanks,

Dennis

 

 

 

Hi,

 

Can you post the configs of the 3 firewalls and remember to mask any sensitive data.

 

Regards

 

Andy

The SSG140 that connects to the SSG5 has this config:

 

set clock timezone -6
set clock dst recurring start-weekday 2 0 3 02:00 end-weekday 1 0 11 02:00
set vrouter trust-vr sharable
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset auto-route-export
exit
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 "netscreen"
set admin password "****************************"
set admin http redirect
set admin auth timeout 10
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
set zone "DMZ" tcp-rst
set zone "VLAN" block
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 "Trust"
set interface "ethernet0/1" zone "DMZ"
set interface "ethernet0/2" zone "Untrust"
set interface "tunnel.1" zone "Trust"
set interface ethernet0/0 ip 10.38.71.1/24
set interface ethernet0/0 nat
unset interface vlan1 ip
set interface ethernet0/1 ip 172.16.1.100/16
set interface ethernet0/1 nat
set interface ethernet0/2 ip x.x.x.x/25
set interface ethernet0/2 route
set interface tunnel.1 ip unnumbered interface ethernet0/2
set interface ethernet0/2 gateway x.x.x.1
unset interface vlan1 bypass-others-ipsec
unset interface vlan1 bypass-non-ip
set interface ethernet0/0 ip manageable
set interface ethernet0/1 ip manageable
set interface ethernet0/2 ip manageable
set interface ethernet0/2 manage ping
set interface ethernet0/2 manage telnet
set interface ethernet0/2 manage ssl
set interface ethernet0/2 manage web
set interface vlan1 manage mtrace
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 console page 10
set pki authority default scep mode "auto"
set pki x509 default cert-path partial
set address "Trust" "10.38.71.0/24" 10.38.71.0 255.255.255.0
set address "Trust" "172.20.0.0/16" 172.20.0.0 255.255.0.0
set address "Untrust" "172.20.0.0/16" 172.20.0.0 255.255.0.0
set ike gateway "My GW1" address 0.0.0.0 id "mygw1" Aggr outgoing-interface "ethernet0/2" preshare "*********************************" proposal "pre-g2-3des-sha"
unset ike gateway "My GW1" nat-traversal
set ike respond-bad-spi 1
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 vpn "My VPN1" gateway "My GW1" no-replay tunnel idletime 0 proposal "g2-esp-3des-sha"
set vpn "My VPN1" monitor
set vpn "My VPN1" id 1 bind interface tunnel.1
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
set url protocol websense
exit
set vpn "My VPN1" proxy-id local-ip 10.38.71.0/24 remote-ip 172.20.0.0/16 "ANY"
set policy id 1 from "Trust" to "Trust"  "10.38.71.0/24" "172.20.0.0/16" "ANY" permit log
set policy id 1
exit
set nsmgmt bulkcli reboot-timeout 60
set ssh version v2
set config lock timeout 5
unset license-key auto-update
set snmp port listen 161
set snmp port trap 162
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset add-default-route
set route 172.20.0.0/16 interface tunnel.1 preference 20
exit
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
 

The other SSG140 has almost exactly the same config :

 

set clock timezone -6
set clock dst recurring start-weekday 2 0 3 02:00 end-weekday 1 0 11 02:00
set vrouter trust-vr sharable
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset auto-route-export
exit
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 "netscreen"
set admin password "*********************************"
set admin http redirect
set admin auth timeout 10
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
set zone "DMZ" tcp-rst
set zone "VLAN" block
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 "Trust"
set interface "ethernet0/1" zone "DMZ"
set interface "ethernet0/2" zone "Untrust"
set interface "tunnel.1" zone "Trust"
set interface ethernet0/0 ip 10.38.70.1/24
set interface ethernet0/0 nat
unset interface vlan1 ip
set interface ethernet0/1 ip 172.16.1.100/16
set interface ethernet0/1 nat
set interface ethernet0/2 ip y.y.y.y/28
set interface ethernet0/2 route
set interface tunnel.1 ip unnumbered interface ethernet0/2
set interface ethernet0/2 gateway y.y.y.1

unset interface vlan1 bypass-others-ipsec
unset interface vlan1 bypass-non-ip
set interface ethernet0/0 ip manageable
set interface ethernet0/1 ip manageable
set interface ethernet0/2 ip manageable
set interface ethernet0/2 manage ping
set interface ethernet0/2 manage telnet
set interface ethernet0/2 manage ssl
set interface ethernet0/2 manage web
set interface vlan1 manage mtrace
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 console page 10
set pki authority default scep mode "auto"
set pki x509 default cert-path partial
set address "Trust" "10.38.70.0/24" 10.38.70.0 255.255.255.0
set address "Trust" "172.20.0.0/16" 172.20.0.0 255.255.0.0
set address "Untrust" "172.20.0.0/16" 172.20.0.0 255.255.0.0
set ike gateway "My GW2" address 0.0.0.0 id "mygw2" Aggr outgoing-interface "ethernet0/2" preshare "*************************" proposal "pre-g2-3des-sha"
unset ike gateway "My GW2" nat-traversal
set ike respond-bad-spi 1
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 vpn "My VPN2" gateway "My GW2" no-replay tunnel idletime 0 proposal "g2-esp-3des-sha"
set vpn "My VPN2" monitor
set vpn "My VPN2" id 1 bind interface tunnel.1
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
set url protocol websense
exit
set vpn "My VPN2" proxy-id local-ip 10.38.70.0/24 remote-ip 172.20.0.0/16 "ANY"
set policy id 1 from "Trust" to "Trust"  "10.38.70.0/24" "172.20.0.0/16" "ANY" permit log
set policy id 1
exit
set nsmgmt bulkcli reboot-timeout 60
set ssh version v2
set config lock timeout 5
unset license-key auto-update
set snmp port listen 161
set snmp port trap 162
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset add-default-route
set route 172.20.0.0/16 interface tunnel.1 preference 20
exit
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit

 

And this is the SSG5's config:

 

set clock timezone 0
set vrouter trust-vr sharable
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset auto-route-export
exit
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 "netscreen"
set admin password "**********************************"
set admin http redirect
set admin auth timeout 10
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 "DMZ" tcp-rst
set zone "VLAN" block
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 "bgroup0" zone "Trust"
set interface "tunnel.2" zone "Trust"
set interface "tunnel.3" zone "Trust"
set interface bgroup0 port ethernet0/2
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 z.z.z.z/22
set interface ethernet0/0 route
set interface bgroup0 ip 172.20.1.250/16
set interface bgroup0 nat
set interface tunnel.2 ip unnumbered interface bgroup0
set interface tunnel.3 ip unnumbered interface bgroup0
unset interface vlan1 bypass-others-ipsec
unset interface vlan1 bypass-non-ip
set interface ethernet0/0 ip manageable
set interface bgroup0 ip manageable
set interface ethernet0/0 manage ping
set interface ethernet0/0 manage telnet
set interface ethernet0/0 manage ssl
set interface ethernet0/0 manage web
set interface bgroup0 manage mtrace
set interface ethernet0/0 dhcp client enable
set interface ethernet0/1 dhcp client enable
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 interface "serial0/0" modem aux enable
set flow tcp-mss
unset flow tcp-syn-check
unset flow tcp-syn-bit-check
set flow reverse-route clear-text prefer
set flow reverse-route tunnel always
set console page 10
set domain myisp.net
set pki authority default scep mode "auto"
set pki x509 default cert-path partial
set address "Trust" "10.38.70.0/24" 10.38.70.0 255.255.255.0
set address "Trust" "10.38.71.0/24" 10.38.71.0 255.255.255.0
set address "Trust" "172.20.0.0/16" 172.20.0.0 255.255.0.0
set address "Untrust" "10.38.71.0/24" 10.38.71.0 255.255.255.0
set ike gateway "My GW1" address x.x.x.x Aggr local-id "mygw1" outgoing-interface "ethernet0/0" preshare "*****************" proposal "pre-g2-3des-sha"
set ike gateway "My GW2" address y.y.y.y Aggr local-id "mygw2" outgoing-interface "ethernet0/0" preshare "*****************" proposal "pre-g2-3des-sha"
set ike respond-bad-spi 1
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 vpn "My VPN1" gateway "My GW1" no-replay tunnel idletime 0 proposal "g2-esp-3des-sha"
set vpn "My VPN1" monitor rekey
set vpn "My VPN1" id 1 bind interface tunnel.2
set vpn "My VPN2" gateway "My GW2" no-replay tunnel idletime 0 proposal "g2-esp-3des-sha"
set vpn "My VPN2" monitor rekey
set vpn "My VPN2" id 2 bind interface tunnel.3
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
set url protocol websense
exit
set vpn "My VPN1" proxy-id local-ip 172.20.0.0/16 remote-ip 10.38.71.0/24 "ANY"
set vpn "My VPN2" proxy-id local-ip 172.20.0.0/16 remote-ip 10.38.70.0/24 "ANY"
set policy id 1 from "Trust" to "Untrust"  "Any" "Any" "ANY" permit
set policy id 1
exit
set policy id 4 from "Trust" to "Trust"  "172.20.0.0/16" "10.38.71.0/24" "ANY" permit log
set policy id 4
exit
set policy id 5 from "Trust" to "Trust"  "172.20.0.0/16" "10.38.70.0/24" "ANY" permit log
set policy id 5
exit
set nsmgmt bulkcli reboot-timeout 60
set ssh version v2
set config lock timeout 5
unset license-key auto-update
set snmp port listen 161
set snmp port trap 162
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset add-default-route
set route 10.38.71.0/24 interface tunnel.2 preference 20
set route 10.38.70.0/24 interface tunnel.3 preference 20
exit
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
 

Hi,

 

Do you get the same message if you connect ot the second ssg140 first and then connect to the other ssg140?

 

Regards

 

Andy

It seems to matter which connection is created first.  The first connection I define on the SSG5 works but the second one doesn't.  If blast the SSG5 config and create a connection to the other SSG140, it works.  Powering off the "working" SSG140 doesn't help the SSG5 connect to the other SSG140.

Hmm, config looks ok. Might be worth doing a "debug ike detail" this should show us some more informaiton about the messages that are being received.

 

If you do the following from the cli on the second ssg that fails when you try to connect both vpns.

 

 

"debug ike detail"

 

"clear db"

 

connect the vpn to the first site and then get the vpn to connect to the second site so that we should see the error message in the debug that we are running.

 

once you see theerror message in the event log then

 

"get db str"

 

Copy and post the output.

 

"undebug all"

 

Regards

 

Andy

I have replaced the SSG5's dynamic IP address with "x.x.x.x".  The following events were logged every 4 seconds.

 

## 2008-12-31 08:56:00 : IKE<x.x.x.x> ike packet, len 184, action 1                                                                      
## 2008-12-31 08:56:00 : IKE<x.x.x.x> Catcher: received 156 bytes from socket. 
## 2008-12-31 08:56:00 : IKE<x.x.x.x> ****** Recv packet if <ethernet0/2> of vsys <Root> ******                  
## 2008-12-31 08:56:00 : IKE<x.x.x.x> Catcher: get 156 bytes. src port 500                                                                             
## 2008-12-31 08:56:00 : IKE<0.0.0.0>   ISAKMP msg: len 156, nxp 1[SA], exch 2[MM], flag 00                  
## 2008-12-31 08:56:00 : IKE<x.x.x.x> Recv : [SA] [VID] [VID] [VID]                                                                          
## 2008-12-31 08:56:00 : IKE<0.0.0.0>   Not found: 1st peer_ent that is used, with no peer IP, and right local IP.                                         
## 2008-12-31 08:56:00 : IKE<x.x.x.x> Rejected an initial Phase 1 packet from an unrecognized peer gateway.                              

 

Thanks,

DennisW

Well, I got it working.  Funny, but I read another post on this forum from a guy who fixed a similar problem by redoing and rebooting again and again.  Add me to the list!

 

I did change the local ID of the SSG5 to something new.  The two defined gateways on the (dynamic IP) SSG5 always had unique local IDs, though.  (Not that I know if they should be unique!)

 

Thanks for your help Andy.  At least I learned how to turn on debug.

 

Cheers,

DennisW