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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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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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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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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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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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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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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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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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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Aug 22, 2011
I´m getting a dynamic public IP from my provider and what I´m trying to do is to establish a remote vpn tunnnel using IPSec which I achieve but every time the sessions resets or the ASA 5505 resets I get a new public IP and I need to put the new IP on the remote client so I can establish the vpn... How can I establish an ipsec vpn using DNS? For this scenario the remote vpn client is a vpn phone but it could be for any vpn client.
Private IP Public IP Private IP
PBX ---- (LAN) ---- ASA 5505 ---( Internet ) --- Remote Site ( Router ) --- (LAN) -- VPN Phone
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May 7, 2012
I have a site to site IPSec tunnel setup and operational but periodically the remote site goes down, because of a somewhat reliable internet connection. The only way to get the tunnel to re-establish is to go to the remote site and simply issue a ping from a workstation on the remote network. We were having this same issue with a Cisco PIX 506E but decided to upgrade the hardware and see if that resolve the issue. It ran for well over a year and our assumtions was that the issue was resolved. I was looking in the direction of the security-association lifetime but if we power cycle the unit, I would expect that it would kill the SA but even after power cycling, the VPN does not come up automatically.
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Nov 18, 2011
I configured an IPSec VPN tunnel between two ASA 5505 firewalls. I would like to make sure that the IPSec tunnel (hence the security association) is permanent and do not drop due to idle condition.
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Feb 10, 2011
Having a problem getting an ipsec tunnel to work between 2 asa 5505. This in one of the two configs.
Result of the command: "show run"
: Saved:ASA Version 8.3(2) !hostname 20Pullmandomain-name skeincenable password IKxxneNMTRgDw/Xd encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Vlan1nameif insidesecurity-level 100ip address 172.16.1.70 255.255.255.0 !interface Vlan2nameif outsidesecurity-level 0ip [Code]...
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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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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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Jun 19, 2012
I have 2 ipsec tunnel active on ASA5505 (secplus license).I would like to activate sslvpn also. Is it possible or there are issues in keeping active both services?
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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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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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Dec 5, 2010
I've a asa 5510 on the main site and different ASA 5505 on secundary sites for VPN tunneling between the sites. The problem is that the tunnels are acomplished but no traffic is going over them. What am i doing wrong? For the moment there is a ASA 5505 on the main site managing the tunnels but I want the 5510 to take over the job.
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Feb 4, 2013
Two 5505 ASA's for a customer main site and a local office. I have the tunnel up. But I'm unable to pass traffic across it.
Main Site:
ASA Version 7.2(4)
!
hostname Town
enable password iNbSyJZ1ffmb9kn1 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
[code]....
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Mar 17, 2011
We have a VPN setup and here's the configuration on the Cisco ASA 5505: [code] The problem is that i'm able to ping the otherside of the tunnel i.e. 192.168.23.14 from the dmz IP 172.16.1.2 but i'm unable to ping from the hosts behind the ASA.Also the other side is able to ping 172.16.1.2 IP but no IP's behind the ASA.
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Jan 17, 2013
we have a cisco ASA 5505 and are trying to get the following working:
vpn client (ip 192.168.75.5) - connected to Cisco ASA 5505
the client gets a specific route for an internet address (79.143.218.35 255.255.255.255 192.168.75.1 192.168.75.5 100) when i try to access the url from the client i get a syn sent with netstat when i try the packet tracer from the ASA i see the following:
<Phase>
<id>1</id>
<type>FLOW-LOOKUP</type>
<subtype></subtype>
<result>ALLOW</result>
[code].....
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May 17, 2013
I have a ASA 5505, which has two IPSec RA tunnels build, for each one the user is able to authenticate and get an IP address is the designated IP pool, but they are not able to ping the Firewall, or RDP to any internal servers. Here is a copy of the running config:
: Saved
:
ASA Version 7.2(2)
!
hostname ciscoasa(code)
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Nov 20, 2012
I have weird problem with a Site to site VPN tunnel from a Cisco ASA 5505 to an Clavister Firewall.When I restart the Cisco ASA 5505 the tunnel is up and down,up, down, down, and I get all strange messages when I see if the tunnel is up or down with the syntax: [code]
After a while like 5-10 min the vpn site to site tunnel is up and here is the strange thing happening I have all accesslists and tunnel accesslists right I can only access one remote network (Main site Clavister Firewall) trought the vpn tunnel behind the Cisco ASA 5505, and I have 5 more remote networks that I want to access but only one remote network is working trought the vpn tunnel behind the Cisco ASA. I see that when I do this syntax in ASA: show crypto ipsec sa.They had a Clavister Firewall before on that site before and now they have a Cisco ASA 5505 and all the rules on the main site thats have the big Clavister Firewall is intact so the problems are in the Cisco ASA 5505. [code]
All these remote networks are at the Main Site Clavister Firewall.
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Apr 3, 2013
I do have a 5505 up and running, and passing data... url...Now I am trying to get a IPSEC VPN tunnel working.I actually have it up (IKE phase 1 & 2 both passed), but it is not sending/receiving data through the tunnel.
The networks concerned: name 10.0.0.0 Eventual (HQ Site behind Firewall)name 1.1.1.0 CFS (Public Network Gateway for Palo Alto Firewall - Firewall IP: 1.1.1.1)name 2.2.2.0 T1 (Remote site - Outside interface of 5505: 2.2.2.2)name 10.209.0.0 Local (Remote Network - internal interface of 5505: 10.20 9. 0.3) On a ping to the HQ network from behind the ASA, I get port map translation creation failed for icmp src inside:10.209.0.9 dst inside:10.0.0.33 (type 8, code 0)
I am suspecting that there is a NAT error and/or a lack of a static route for the rest of the 10.0.0.0 traffic, and that I may have to exempt/route the traffic for the HQ network (10.0.0.0), but I haven't been able to get the correct entries to make it work. [code]
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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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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 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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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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Oct 19, 2011
- Ipsec tunnell between two 881's
- An Aruba access point trying to set up a tunnell back to controller through the ipsec tunnell, on udp 4500
- 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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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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Mar 9, 2011
We have a Cisco 2820 that serves as a hub and our spokes are Cisco 871s. Its been working for a while and for some reason last week. Http and https traffic over the tunnel is having connection issues. I can Remote desktop or PCanywhere into the remote PCs. From that PC I can ping internal IP address or IP of the webmail server or internal webserver with no issue. But if I access it over the browser it times out or it will work and stop working again. Basically ica, icmp, pcanythere, rdp traffic works over the tunnel but not http or https.
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May 4, 2011
can I force an IPSEC L2L tunnel to use NAT-T encapsulation no matter what? Automatic detection says none of the endpoints are behind NAT. I know I can disable it by the "crypto map XXX set nat-t-disable" command, but I want the exact opposite.
I have a very strange issue where asynchronos routing is making my life as a technician very hard.
A side question; Can I do something about an ISP that is policy-base-routing its ESP traffic (and/or translating it)?
ASA5505 ===>===>===> ISAKMP traffic ===>===>===> ASA5510
212.178.155.73 80.62.yyy.xxx (traffic source IP: 212.178.155.73)
[Code].....
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