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I am having problems configuring a site to site vpn on my Cisco 8xx series router. I have established the vpn using the config provided but can't talk to any computers at the other end.

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  • henry_admin Jan 11, 2009

    I can ping my own gateway and the TIP ip address on the other side. The problem is with configuring the access lists i believe.

    I have the config's from both routers and i need a cisco expert to review it with me.

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Send me the configs from both routers and I will look at it for you and advise. Sounds like an ACL issue.

Posted on May 12, 2009

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Depending on the version of code, sometimes you have to implicitly deny the decrytped traffic. I.e the traffic is matched pre and post decryption (again, depending on code version I thiink). Also, those devices still nat the traffic if it matches the rules. So if you are patting (natting to one address with the overload command), you will need to doe it with an extended acl that "denies" the traffic first so it will not be translated. This will have to happen on both ends prior to you being able to see the result. On static nat entries, that can even be worse and there are some hairy techniques to get around this.

So make sure you are actually sending traffic by looking at the output from a "show crypto ipsec sa". If so, look at nat. My .02.

Posted on Jan 11, 2009

Louis Stanly
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First, check if you are able to ping the default gateway IP, then check if you have configured your NAT for inward request.

Posted on Jan 11, 2009

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I am trying to connect using Cisco VPN through my Motorola wireless router, but cannot connect. I check with my internet service provider and they do allow VPN. Our IT division has checked the...
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Its like router on stick configuration??enter the interface which you have to configure and in that interface as mentioned below
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Hostname(config-if)#no shutdown
Hostname(config)#interface FastEthernet0/1.1
Hostname(config-if)#encapsulation dot1Q 1 native
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interface FastEthernet0/1.2
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Cisco VPN doesnt get connected through DI-524UP router. Worked fine until recently for both the laptops we use. Log indicates Receive: Purging stale cached fragment(s). Direct connected on the Motorola...
Cisco VPN
Upgrade your router to the latest firmware. You can download firmware at http://www.dlink.com.au/tech/ .
Disable all Firewall Software (ZoneAlarm, Windows XP Firewall, etc.).
Configuring PC running VPN Client Software:
Step 1 Disable all Firewall Software (ZoneAlarm, Windows XP Firewall, etc.).
Step 2 Change IP Address to be outside of the routers DHCP Pool (i.e. 192.168.0.99). By default the DHCP pool is 192.168.0.100 - 192.168.0.199.
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Step 5 Allow IPSec over UDP ( NAT/PAT).
Configuring Router using the Web-based configuration:
Step 1 Open the Web Configuration Page by entering 192.168.0.1 into your web browser. Enter username (admin) and your password (blank by default).
Step 2 Check the Status tab and make sure that you are running the latest version of firmware. If not, upgrade firmware before proceeding.
Step 3 Click on the Miscellaneous button on the Tools tab. Enable both PPTP and IPSec.
Step 4 Click Apply.
Step 5 Click on the Virtual Servers button on the Advanced tab.
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Public Port: 500
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Step 7 Click Apply and then Continue.
Step 8 Enable PPTP from the list and configure as follows:
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Public Port: 1723
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Step 9 Click Apply and then Continue.


http://www.dlink.com.au/tech/default.asp?model=DI-524UP

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2 Answers

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I hope this is helpfull for you.

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