Cisco VPN :: ASA5500 / TCP State Bypass For Traffic - Coming From IPsec Tunnel?

Feb 6, 2012

We have problems on central firewall with restricting traffic coming from remote office from IPsec. (The network sheme is attached) All branch offices are connected to central asa though IPsec. The main aim is to rule access from branch offices only on the central firewall, NOT on each IPsec tunnel According to the sheme:172.16.1.0/24 is on of the branch office LANs10.1.1.0/24 and 10.2.2.0/24 are central office LANThe crypto ACL looks like  permit ip 172.16.1.0/24 10.0.0.0/8 the aim is to restrict access from 172.16.1.0/24 to 10.1.1.0/24 When packets are generated from host 10.1.1.10 to 172.16.1.0/24 all is ok -  they are dropped by acl2 When packets are generated from 172.16.1.0/24 to 10.1.1.10 they are not dropped by any ACL - the reason is stateful firewall - traffic bypasses all access lists on a back path I thought that TCP State Bypass feature can solve this problem and disable stateful firewall inspection for traffic coming from 172.16.1.0/24 to 10.1.1.0/24, but it didn't work.The central asa 5500 is configured according to cisco doc [URL] 
 
access-list tcp_bypass_acl extended permit tcp 172.16.1.0 255.255.255.0 10.1.1.0 255.255.255.0
!
class-map tcp_bypass_map
description "TCP traffic that bypasses stateful firewall"
match access-list tcp_bypass_acl

[code].....

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Cisco VPN :: ASA Or 871 IPSec L2L To SSG-140 - Tunnel Is Up But No Traffic

Aug 8, 2012

i am curently troubleshooting a ipsec l2l VPN between
 
1. ASA 7.2(4) to SSG-140
2. Cisco 871W to SSG-140
 
In both scenario's the tunnel is nicely established, and traffic goes into the tunnel, but nothing comes out. All encap's, but no decap's                    
 
It seems like a routing issue, but we can not find anything on both sites.
 
So maybe i m running into a (known) issue between cisco VPN equipment and the SSG-140?
 
Could it be a proxy-id issue? Cause they configure stuff like 10.1.1.0/24 and i configure 10.1.1.0 0.0.0.255

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Cisco VPN :: 881 / Route Traffic Thru IPSec Tunnel To DMZ

Jun 29, 2011

I need to route traffic to DMZ (and internal) from the branch office thru the IPSec tunnel. How do I manage that with my Cisco 881?

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Cisco VPN :: ASA 5505 - IPSec VPN L2L Tunnel Up But No Traffic

Mar 19, 2011

I have a Site to Site IPSEC VPN Tunnel created with ASDM wizard.
 
Cisco ASA-5505
Peer A: x.x.x.x
Lan A:     192.168.0.0    255.255.255.0
 Fortinet FortiGate-50b
Peer B: y.y.y.y
Lan B:     192.168.23.0  255.255.255.0
 
I start traffic from LAN B with a ping (or telnet it doesn't matter) that receive no reply but tunnel goes up fine.
 
"show isakmp sa" seems ok (says "State   : MM_ACTIVE")
"show ipsec sa" seems ok but all #pkts are zero
 
try ftp, telnet from LAN B to LAN A systems but no one work. "show ipsec sa" all #pkts are zero As soon as I generate traffic from LAN A to LAN B these works (with tunnel already up) also traffic from LAN B to LAN A works.Obviously if I end VPN and start tunnel making traffic from LAN A all work fine bidirectionally, LAN A reach LAN B and LAN B reach LAN A.No msg logged in either two appliance.
 
Seems a very strange problem because seems not related to Phase1 or Phase2 already established.Traffic (routing ?) start works only after at least one packet goes from LAN A to LAN B.No msg logged in either two appliance.Problems begun in ASA version 8.0(4) ASDM version 6.1(3) and remain/continue after upgrade to ASA Version 8.4(1) ASDM version 6.4(1).

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Cisco VPN :: 881 / Route All Traffic Over IPsec Tunnel?

Jan 30, 2012

We have 7 remote offices and 10 tower locations that utilize IPsec tunnels back to our HQ. We now want to force all traffic including web surfing through the tunnels. What would be the easiest way to acomplish this? I have tried utilizing the crypto map policy to do this, but was unable to acomplish this.
 
Each of our office locationss utilize a Cisco 2811 router and the tower locations utilize a Cisco 881.

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Cisco VPN :: 1841 - IPsec Tunnel Two Way Traffic

Oct 23, 2012

We are currently experiencing a problem on an IP SEC VPN tunnel that has all of us here completely stumped. We are hoping that one of you experts out there will be able to assist. Here are some basic details:
 
NETWORKS
An IPSEC site to site tunnel has been built between the two sites on different networks.
PIX 515E - MAIN SITE
Network 172.16.0.0/24
CISCO 1841 - REMOTE SITE
Network 172.16.99.0/24
 
ISSUE
All traffic flows over the VPN from the 172.16.99.0 network in the direction of the Pix, such as RDP, SIP etc. Pings will go in both directions across the tunnel. Other than the pings most traffic will NOT flow over the tunnel from the 172.16.0.0 network on the pix to the 172.16.99.0 network on the 1841. It would appear that something on the 1841 is blocking traffic coming in over the tunnel from the 172.16.0.0 network as we can not get a wire shark capture on a PC on the 172.16.99.0 network, other than the ICMP traces. Usually this is an access list problem but we have checked and double checked the configuration and can't see anything.
 
TROUBLESHOOTING SO FAR
 
1. Have tried inserting various access list changes to the tunnel on the 1841 to make specific reference to the 172.16.0.0 network. 
2. Have tried various NAT entries. 
3. Have removed and then recreated the VPN tunnel from a fresh start. 
4. Have made the MTU 1400 on the inside interfaces on the Pix and the 1841.
 
The tunnel is fully up at all times and as we say can ping in both directions.

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Cisco VPN :: ASA 5505 - Forward All Traffic Over Ipsec Tunnel?

Jul 18, 2011

I currently have two Cisco ASA 5505.  They are at different  physical sites (SITE A, SITE B) and are configured with a site-to-site VPN which is  active and working.
 
I can communicate with the subnets on either site from the other and both are connected to the internet, however I need to ensure that all the traffic at my site B goes through this VPN to my site A.
 
I changed this access-list : access-list outside_2_cryptomap extended permit ip network_siteB network_siteA to access-list outside_2_cryptomap extended permit ip network_siteB any
 
But this does not work. If I do [URL], site B IP address  is not same that site A.

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Cisco VPN :: 5505 LAN-to-LAN IPsec VPN Tunnel Traffic Not Being Routed

Feb 24, 2011

I am trying to set up a LAN-to-LAN VPN tunnel between two sites.  One site has a 5505, and the other site has a 5510.  It looks like the tunnel is being established fine (both ISAKMP and IPSEC SAs look OK), but traffic doesn't appear to be routing across the internet between the devices. [code]

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Cisco Switching/Routing :: 1941 / IPSec Tunnel Up No Traffic?

Mar 7, 2013

I have an IPSec tunnel configured on my Cisco 1941. The other device is an ZyXEL router.I can see the tunnel is up but there is no traffic.This comes out the show crypto ipsec sa

interface: Dialer1
Crypto map tag: CMAP_AVW, local addr 10.10.10.89
   protected vrf: (none)
   local  ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.150.0/255.255.255.0/0/0)
   current_peer 20.20.20.161 port 500

[code]....

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Cisco VPN :: Traffic Is Not Passing On Plain IPSec Tunnel Between Two 892s

Dec 14, 2011

I've replaced real networkID to the one mentined below.
 
Topology: classical IPSec VPN tunnel between two Cisco 892s, with pre-shared key and no GRE. One 892 (branch_892) has access to the Internet via PPPoE and has three networks/vlans behind it. One VLAN is NATed to access internet via the PPPoE. Access to two other VLANs - VL92 (100.100.200.0/24) and VL93 (100.100.100.0/24) need is done thrue the VPN tunnel.
 
Second 892 (892_DC) has just one interface - WAN on Gigabit enabled/connected and has a static route to the default GW. It does not have any interal network defined. So the router is strictly used to send traffic for VL92/VL93 to the branch 892 via IPSec tunnel.
 
Here is the problem: access to/from VL93 (100.100.100.0/24) works, however for VL92 (100.100.100.0/24) - does not.
 
From devices in VL92 I can ping the 892_DC IP address across the VPN tunnel. From the 892_DC router I can also ping devices in VL92. However I can no ping from VL92 any device beyond the 892_DC and at the same time packet arriving on 892_DC for VL92 are not sent out via the VPN tunnel.
 
I took the packet trace on 892_DC using capture point/buffer to capute packets for VL92 and could see that traffic does arrive at the 892_DC. I run the same capute on Branch_892 and there was not a single packet.More interesting I modified the access list such a way that left on VL92 and still - no packets are sent out thru the tunnel. [code]

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Cisco Routers :: RVL200 IPSEC Channel All Or Some Data Traffic Through Tunnel

Jan 2, 2013

Is it at all possible to channel all/some data traffic through an established ipsec tunneled connection using the RVL200? I have successfully established an ipsec connection through RVL200 and RV042 routers and are able to connect to servers/computers behind it.Now I want to channel all or some traffic through the ipsec-tunnel for computers that reside on 192.168.1.0 subnet of RVL200 network.
 
Main office - RV042 router - 10.200.62.1
Remote office - RVL200 router - 192.168.1.1
 
I am trying to use the Advanced Routing option to add static routes but I am not 100% sure if I am configuring the routes correctly.To give an example of routing DNS requests for HOTMAIL.COM [65.55.72.183]: [code]For some reason this does not appear to work. I have also tried using the interface setting of WAN and tested - this also does not work.

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Cisco Routers :: Rv220W / Assign Vpn Traffic To A Vlan When Setup An Ipsec Tunnel?

Apr 7, 2012

i'm using an rv220W and i whant to know if is it possible to assign vpn traffic to a vlan when i setup an ipsec tunnel?
 
example:
Im using different vlans on my rv220W.
Vlan 10: engineers (ex: 192.168.1.0/27) no intervlan routing
Vlan20: sales (ex: 10.0.123.0/24) no intervlan routing
 
 This is what i need:  - An engineer is on the road and when he makes a ipsec vpn connection => assignd to the vlan "engineers" so he can access the server/pc's in that vlan.and when someone from the sales group starts a vpn connection he needs to be in the vlan "sales" so he can access his pc/data,...

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Cisco Firewall :: ASA 5540 - IPSec Tunnel / ASA Refuses To Encrypt Traffic But Decrypts It

May 31, 2012

This has to be the most weirdest issue I have seen since the past year on my ASA. I have an ASA 5540 running the 8.4(2) code without any issues until I stumbled upon this problem last week and I have spent sleepless nights with no resolution! So, take a deep breath and here is a brief description of my setup and the problem:
 
A Simple IPSEC tunnel between my ASA 5540 8.4(2) and a Juniper SSG 140 screen OS 6.3.0r9.0(route based VPN)
 
The tunnel comes up without any issues but the ASA refuses to encrypt the traffic but decrypts it with GLORY! below are some debug outputs, show outputs and a packet tracer output which also has an explanation of my WEIRD NAT issue:  

My setup - ( I wont get into the tunnel encryption details as my tunnel negotiations are **** perfect and comes up right off the bat when the ASA is configured as answer only)
 
CISCO ASA - IPSec networking details
LOCAL NETWORK - 10.2.4.0/28
REMOTE NETWORK - 192.168.171.8/32
JUNIPER SSG 140 - IPSec networking details
PROXY ID: LOCAL NETWORK - 192.168.171.8/32
REMOTE NETWORK - 10.2.4.0/28 
HOST NAME# sh cry ipsec sa peer <JUNIPER SSG PEER>
peer address: <JUNIPER SSG PEER>
[code]... 

As you can see, there is no echo reply packet at all as the packet is not being encapsulated while it is being sent back. I have been going mad with this. Also, this is a live production multi tenant firewall with no issues at all apart from this ****** ip sec tunnel to a juniper!!

Also, the 192.168.10.0/24 is another IP Sec tunnel remote network to this 10.2.4.0/28 network and this IP SEC tunnel has a similar Juniper SSG 140 screen os 6.3.0r9.0 at the remote end and this woks like a charm without any issues, but the 171 is not being encrypted by the ASA at all.

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Cisco VPN :: ASA5500 / Command To Check Tunnel Up-time?

Jun 27, 2011

I am using ASA5500 series box which has a site to site tunnel terminated on it.Is there any command by which we can check the up time of the tunnel.
 
ASA# sh isakmp sa
   Active SA: 1    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)Total IKE SA: 1
1   IKE Peer: x.x.x.x    Type    : L2L             Role    : responder     Rekey   : no              State   : MM_ACTIVE

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Cisco Firewall :: ASA5500 - AnyConnect Vs IPsec VPN Client Licensing

Sep 19, 2011

I was wondering if  it is needed to license the IPsec VPN clients in the ASA5500 firewalls...I know that you have license the SSL VPN peers (AnyConnect). I am almost sure that for the IPsec you don't have to.

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Cisco VPN :: ASA5500 Remote Access Group Policies IPsec Client Firewall

Mar 6, 2011

We have ASA5500's deployed for remote access concentration.We use Cisco IPsec vpn client with a group policy the chacks for Network ICE BlackIce ersonal firewall.The powers-that-be wish to change to McAfee presonal Firewall ok..Now the Group Policy allows you to check for several pre- configured Firewalls, Cisco Integrated, Sygate, Zone Labs etc.So as McAfee are no listed then I am to assume we go for "Custom Firewall" and this is where I am struggling.To configure checking for a Custom Firewall I must have the Vendor ID and the Product ID.McAfee haven't the faintest idea what we're talking about when we ask them for these details.Or is there a way to extract them from the registry of a machine with the McAfee product installed?

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Cisco :: Full Access To Everything Since The Tunnel Is Set To Bypass Interface ACLS?

Nov 23, 2011

I have ip phones at the remote location that connect into the phone switch(it's a nortel cs1000 system) over the tunnel. Internal calls work just fine, however when somebody calls from the outside, or calls are made to the outside the connection is never finalized. Like if I call from my cell it rings the phones, but when I answer there is nothing but dead air.In the group policy for the tunnel, I gave the remote site FULL access to the phones vlan and vice versa...which obviously works since internal calls work fine. If I remove my group policy and give it the Default group policy which essentially gives that tunnel full access to everything since the tunnel is set to bypass interface ACLS, external calls work fine. So it's definitely related to the group policy.

The group policy is basicallyAllow remote site to X network/host on these ports no denies since it blocks whatever isn't specifically allowed. However since it can get the phone switch and it can get to the internet I'm not seeing why the calls aren't working.The only thing I can think of to try doing as well is remove the allow inbound traffic to bypass interface rules and treat it just like another vlan interface on the ASA. Create the rules on each interface for the remote site network etc and see if it works that way.

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Cisco VPN :: IKE-UDP500 / Windows Firewall IPSEC Bypass Across Remote Client VPN?

Jun 15, 2011

I am trying to implement IPSec Authenticated Firewall Bypass on windows vista clients within my microsoft domain to avoid implementing numerous windows firewall port exceptions for each client.

This is working internally on our network, between services servers (i.e AV server), and desktop clients. However i am having a problem when the clients are remotly accessing the domain via the VPN client.I have open traffic ports (IKE-UDP500, ESP - IP Prot 50, AH - IP Prot 51) bidirectionally between the remote vpn clients subnet and the services servers, however when the endpoints initiate traffic to the services server, the IKE traffic is unencrypted?

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Cisco VPN :: 1941 Encrypted GRE Tunnel Changes State To Reset / Down Upon IOS Upgrade

Jun 16, 2011

I installed a 1941 router with an encrypted GRE tunnel yesterday.  The router has ipbasek9 and securiyk9 licensed.  Initially the router was running the image c1900-universalk9-mz.SPA.150-1.M5.bin and was working fine.  The tunnel was up and passing traffic.  I then upgraded the IOS to c1900- universal k9-mz.SPA.151-2.T2.bin and when I reloaded the router the tunnel was stuck in a reset/down state.  I tried doing shut/no shut on the interface and reloading the router again, no change.  Being under some time pressure to get the device back into production I rolled back to the previous IOS image and the tunnel worked fine again.  Is there a known bug that causes this behavior?  I have searched cisco.com but have not found one.  [code]

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Cisco VPN :: 2800 - Tunnel Not Coming Back Up After Power Cycle

Apr 15, 2013

Cisco 2800, 12.4(23b) router has two VPN tunnels to other Cisco devices.
 
Authentication uses certificates from a PKI CA server. Under normal circumstances all works fine, both crypto sessions up.
 
After a power cycle (having first saved configs) however, the crypto sessions are stuck in DOWN-NEGOTIATING.
 
The certificate on the router still looks valid.
 
The only way to get the sessions back up is to renew the certificate, which seems strange as the existing one appeared to be still valid.

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Cisco WAN :: 861-W Traffic Coming In And NAT / PAT?

Oct 20, 2011

I am slowly getting this router configured........I am up and running.  Traffic from All nodes inside can go outside.  My next step is to configure traffic coming in to go to my server.  I have Web, FTP, SMTP and POP running on the same server in my LAN.  I need to us NAT/PAT to direct incoming traffic to it.  I belive I have this done correctly,  but obviously not...I only have port 80 configured in the config file,  if I can get that to work the rest would be the same........

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Cisco WAN :: 1941 Router - Enable IPSec Virtual Tunnel Interface With Tunnel Mode IPv4

Sep 23, 2012

I'm in process of purchasing a new Cisco routers for our branches that will be used primary to enable IPSec virtual tunnel interfce with "tunnel mode ipsec ipv4". does the default IOS IP Base supports this feature? or i need to purchase DATA license or SECURITY license?

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Mark Traffic Coming From S1 To R1 - S2 To R2 - And S3 To R3 On Switch 2

Mar 25, 2013

I have a small problem and I'm a bit confused, Cisco suggested that you should mark traffic as close to the end devices as possible. So I wanted to try marking the traffic coming from S1 to R1, S2 to R2, and S3 to R3 on Switch 2 (Cisco Catalyst 2960) with the following config:

[code]...

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Cisco Application :: 4710 - Bypass Traffic With Source And Destination From Loadbalancing

Jul 30, 2012

I have a requirement to  bypass some specific traffic (with particular source to specific internet destination) in ACE 4710.
 
All the webtraffic (http and https) is configured to loadbalance to my proxies , i need to configure some specific traffic with source and destiantion to internet to byepass from this loadbalancing and directly got to outside interface .

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Cisco Routers :: Set A VPN IpSec Tunnel GW To GW Tunnel Between RV110W

Oct 17, 2012

I am using a Cisco RV110W (Firmware 1.2.09) in a branch and I would like to create a VPN Tunnel to another site that has a Cisco RV042 (firmware v4.2.1.02)
 
What would be the correct Configuration? the current configuration I am using is
 
in the RV042 i am using
 
Check Enable 
Local Group Setup
Local Security Gateway Type : IP Only
IP Address : RV042 Pulbic IP address

[Code].....

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Jan 1, 2013

I'm looking for a way to configure Cisco ACE4710 loadbalancer to bypass traffic that is initiated from server side to Internet?Are there any way to configure this, so that the loadbalancer will not maintain session for this bypass traffic to maximize throughput?

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Cisco Firewall :: 6509-E / Traffic Coming From GRE Interface And Going Further Through FWSM?

Oct 4, 2011

I have problem with traffic coming from GRE interface and going further through FWSM on the same 6509-E chassis.It's very interesting and confusing. If packets are fragmented, I can go through, however, if I use normal packets (usual ping for example) traffic goes from outside to inside and stops on it's way back.
 
Here is the detailed info:
WS-C6509-E with WS-SUP720-3B
FWSM HW 4.0,  SW 4.1(4) 
 
GRE is done in hardware (source is loopback interface - only one loopback per GRE tunnel).

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Cisco WAN :: 7201 Option To Send All Traffic Through GRE Tunnel / L2TPV3 Tunnel

Jan 9, 2011

i have a 7201 router with NPE-G2. i have a design which i have the option to send all the traffic through a GRE tunnel or a L2TPV3 tunnel.which method is more CPU consumption ?

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Jan 24, 2012

I have catalyst 6500s with two VS-S720-10Gs, one is in Active and one is in Hot state. Both Sup cards have two 10G uplink ports. How does the traffic forwarding works in this case on the uplink ports? Do these uplink ports actively forward traffic or it is only the uplinks ports on Active that forward traffic? I see CDP neighbors on both Active and Hot SUPs uplinks ports - it  indicates that packets are flowing on both cards.
 
I want all uplink ports on both SUPs to actively forward traffic. Does it work? What is the config for this?

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Cisco VPN :: How To Configure Router To Forward Traffic Coming In TCP Port 8100 To Machine

Aug 20, 2012

I have the following setup: Private network <-> SW <-> CISCO VPN <-> ISP MODEM
 
I have configured VPN part and is working correctly. I have a computer in the private network at static address 192.168.1.100  and an application is running on it on 8100 tcp port for clients.
 
Now I need to connect from the Internet to the application on 192.168.1.100 on port 8100.
 
How to configure CISCO router to forward traffic coming in tcp port 8100 to machine 192.168.1.100?? ISP Modem is going to handover all the traffic to CISCO device.

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Networking :: To Tunnel All Routers Traffic Through SSH Tunnel With WRT300n

Jul 24, 2012

Environment :linksys wrt300n v1.1 which can have ddwrt-mega. Willing to tunnel all lan's outbound traffic through an ssh tunnel.

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Cisco VPN :: Ipsec Tunnel Between Two 881

Oct 19, 2011

- Ipsec tunnell between two 881's
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- Even though traffic shouldn't be NAT'ed (and other traffic is not), udp 4500 is NAT'ed
 
I guess this might be default behaviour, thing is that it used to work when it was set up as a route based easy vpn.

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Cisco :: How To Create Ipsec Tunnel

May 4, 2011

how to create ip sec tunnel using these parameters. customer ip where tunnel has to be connected 1.1.1.1

ISAKMP Parameters: (Phase I)
Encryption: AES-256 or 3DES
Authentication Mode: Pre-shared key

[Code]......

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