Question

Checkpoint VPN

Asked by: skywalker101

Hi,

I am trying to set-up a Securemote VPN connection however my fw keeps dropping fw1_topo 264 connections.

I have set-up a rule src: All Users@any  Dest: Net Internal Net   vpn:RemoteAccess  services: Any

My ISP Nats the public IP to an Internal addressi.e.200.0.0.1 - 10.15.20.16

Any Idea's why this is happening I must be missing something ?

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Asked On
2009-10-20 at 05:44:10ID24826625
Topics

Checkpoint Firewall

,

Networking Hardware Firewalls

,

Miscellaneous Networking

Participating Experts
1
Points
500
Comments
24

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Answers

 

by: grimkinPosted on 2009-10-20 at 06:13:58ID: 25613701

Hi,

Go to the gateway properties, VPN -> Link Selection and enter the external IP i.e. 200.0.0.1 in the box. Push policy and test.

The fw1_topo connections should be dealt with in your implied rules: Policy -> Global Properties -> Firewall Implied Rules, first 4 boxes should be checked.

Let us know the outcome, HTH

 

by: skywalker101Posted on 2009-10-20 at 07:37:07ID: 25614599

Yea,

I can confirm I am logging Implied rules and I have selected my external IP in the link selection settings.

The FW is still dropping packets

I have tested my telnet 200.0.0.1 264

 

by: grimkinPosted on 2009-10-20 at 07:41:29ID: 25614643

Hi,

Not concerned about logging them, rather that they are ticked in the box so that they are allowed.

What does Tracker say?
Which rule is it dropped on?
Is it rule 0?
What is the drop reason?

 

by: skywalker101Posted on 2009-10-20 at 08:29:05ID: 25615166

The connection is being drop by the last rule clean up

 

by: grimkinPosted on 2009-10-20 at 09:00:58ID: 25615495

Go to View -> Implied Rules - you should see the FW1_topo specified about 9 from the top. If it's not there then you need to either check implied rules as shown in the screenshot or, if you have disabled them for whatever reason, you need to specify a rule allowing ANY to the GATEWAY and MGMT SERVER.

HTH

 

by: skywalker101Posted on 2009-10-20 at 10:00:56ID: 25616141

Hi,

My SD in global properties is already configured as above

 

by: grimkinPosted on 2009-10-20 at 10:21:30ID: 25616345

Try opening your fw1_topo service, click advanced and make sure nothing is configured for source port or protocol type. Also, "match for any" should be ticked.

 

by: skywalker101Posted on 2009-10-20 at 10:39:20ID: 25616530

yea all as above

 

by: grimkinPosted on 2009-10-20 at 13:55:49ID: 25618509

Is this a new deployment or has it worked in the past?

 

by: skywalker101Posted on 2009-10-21 at 00:18:16ID: 25621337

It a new deploymnet of a vpn, the firewall has been operating for about 6 months running NGX R65

 

by: grimkinPosted on 2009-10-21 at 03:25:58ID: 25622403

Try adding a rule in:

Src: ANY
Dst: Gateway, Mgmt server
Service: fw1_topo
Action: Accept, Log

 

by: skywalker101Posted on 2009-10-21 at 03:49:40ID: 25622524

The same thing drops the packet by the cleanup rule

On the log for the drop packets src:public IP Dest: 10.15.20.16

On the topology tab the External Interface is on the 10.15.20.0 subnet

I have another rule configured for the 10.15.20.16 address which nat to an internal server in the DMZ for services smtp,https and pptp

 

by: skywalker101Posted on 2009-10-21 at 03:54:57ID: 25622551

I added 10.15.21.16 and firewall accepted the packets on SVT, although the connection is still timing out when i telnet publicIP 264

Src: ANY
Dst: Gateway, Mgmt server,10.15.20.16
Service: fw1_topo
Action: Accept, Log

 

by: skywalker101Posted on 2009-10-21 at 03:59:51ID: 25622582

I think I have found the reason

I have a NAT rule which transalates ANY - 10.15.20.16 to Internal Server any Service

 

by: grimkinPosted on 2009-10-21 at 04:35:23ID: 25622832

Ah well, that wouldn't help matters :-)

 

by: skywalker101Posted on 2009-10-21 at 04:37:34ID: 25622850

Although why would this affect the implied rules as the connection should be getting applied before explict rules ?

 

by: grimkinPosted on 2009-10-21 at 04:44:28ID: 25622894

The implied security rules are applied BEFORE explicit manual security rules, the implied NAT rules are applied AFTER manual NAT rules.

HTH

 

by: skywalker101Posted on 2009-10-21 at 04:55:46ID: 25622944

Ah that would explain why it is not working!

Were do you view the implied NAT rules ?

 

by: grimkinPosted on 2009-10-21 at 06:16:16ID: 25623555

All the automatic NAT rules are in the NAT tab, underneath those you have created manually.

 

by: skywalker101Posted on 2009-10-21 at 06:29:30ID: 25623668

OK,

I have 3 manually NAT rules and 2 automatic rules

The automatic rules are office_mode_address pool

net 172.17.10.0 nat hide behind gateway

This net object is not be used is it ok to disable or delete this object ?

 

by: grimkinPosted on 2009-10-21 at 12:30:18ID: 25627421

If that's the network for your office mode then you should leave it alone otherwise you may run into problems later on, if its just a random network then you can delete it.

 

by: skywalker101Posted on 2009-10-22 at 01:16:15ID: 25631740

OK that network can be used as it is not in use.

Can I delete the explicit rule for fw1_topo

Src: ANY
Dst: Gateway, Mgmt server,10.15.20.16
Service: fw1_topo
Action: Accept, Log

 

by: grimkinPosted on 2009-10-22 at 01:21:20ID: 25631760

Yes, absolutely, the implied rule should take care of it.

 

by: skywalker101Posted on 2009-11-12 at 09:28:20ID: 25806621

n/a

20120131-EE-VQP-002

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