Cisco VPN :: ASA 5520 / One Subnet Of L2L VPN Stops Working Periodically?
Jun 14, 2011
I have two Cisco ASA 5520's running software version 8.2(2) set up in a HA pair. The L2L vpn is set up and works as expected between this site and another. The issue is that every few months, one subnet of the VPN, the same one all the time, stops forwarding/receiving traffic. The device in the remote location is not a Cisco device but I am certain the issue lies with the ASA as when I fail over to the slave device the VPN works again, failing back again however stays with the subnet still not passing traffic. I need to reboot the device before it starts forwarding traffic on the subnet again.
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Aug 29, 2010
I'm running Windows 7 64-bit with the very latest AE1000 driver (3.0.10.0). I have a Netgear WNDR3700 with dual band support. I replaced a D-Link DWA-556 PCIe 2.4 GHz card with this USB unit because I was seeing interference with my keyboard and mouse (Logitech Bluetooth). When the AE1000 works, I can consistently connect at 300 Mbps and the speed is great.Unfortunately, every so often, the connection to the internet drops and Windows 7 must do a wireless adapter reset in order to regain access to my network. During this time no other machines connected on the wireless network report any disruption and neither the 2.4 GHz or 5 GHz WiFi profiles are connectable with the AE1000.I've tried switching from the built-in USB 2.0 ports on my motherboard to the USB 3.0 daughtercard to no avail. I've tried uninstalling and reinstalling the driver. However, I started seeing this issue literally the day I installed this thing. The problem happens sometimes a few instances in an hour but then won't happen again for another few hours.In Event Viewer, I'm pretty consistently seeing:The TCP/IP NetBIOS Helper service was successfully sent a stop control. The reason specified was: 0x40030011 [Operating System: Network Connectivity (Planned)]
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Oct 3, 2010
We've got a cisco 2821 router which periodically stops routing all traffic. It seems to happen about once every 2 weeks, and I can't find anything that could be causing it. There are no entries in the log and the router stays up and running but requires a restart to begin processing traffic again. We're running 12.4(13r)T11.Any thoughts, or troubleshooting steps to track this down?
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Jul 23, 2012
I've got a remote site which is connected to the headquarters via VPN site to site IP Sec tunnel. When I am in my office I have no problem to reach the remote network, but, when I try to connect to the remote network via VPN client, I can't reach it.in the remote office I've hot a Router 3800 (Cisco IOS Software, 3800 Software (C3845-DVENTERPRISEK9-M), Version 12.4(13c), RELEASE SOFTWARE (fc2)) in the headquarters I've got an ASA 5520 Version 8.0(3) I've chequed access-list, and network objects and it seems everythink ok.
local network: 10.30.0.0 0.0.0.0
remote network 10.31.0.0 0.0.0.0
ASA
object-group network remote-network
network-object 172.16.27.0 255.255.255.0
[code]....
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Mar 17, 2011
I´m trying to configure a subinterface named Inside with vlan 1 but the interface stops work with this vlan.My switch is a Cisco and use the lan with vlan 1 too.If I change de vlan for other i.e vlan13 works fine. And all others vlans works fine too.Is there a problem to use the vlan 1?
My configuration is:
Cisco ASA:
interface gig0/3
no ip address
no security
no nameif
Interface gig0/3.1
vlan 1
nameif Inside
Securirity-level 100
ip address 10.x.y.x 255.255.224.0
The giga port of the swtich is configure to trunk model.
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Sep 7, 2011
verify if the ASA 5520 CSC module way of applying security policy (http, smtp, pop3, etc.) is per network/subnet or group of users? Based on my understanding through reading, web and email protection profile/config is global. It will be the same to every network user that is redirected via service-policy config on the ASA.
Scenario: I have two VLAN, guest and employee. Of course guest and employee have different web filter profile. Can i configure it such that guest web-filter profile is not just strict while employee's access is limited only to productive internet sites.
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Apr 1, 2013
I have a home office with multiple VLANS/subnets I have many VPNs that connect only a specific subnet to a specific remote offfice. On a 5520, can I create a S2S VPN to different remote offices that have the same IP scheme, but from different home office subnets? For example at my home office let's say I have two independant, distinct VLAN/subnets: 192.168.140.0/24 and 192.168.150.0/24. Can I create an S2S from the 140 subnet to a remote office with a 10.10.10.0 addressing scheme and another S2S from the 150 subnet to a totally different office also with a 10.10.10.0 scheme?
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Apr 24, 2013
i have a 876 Router, connected to the Internet and a VPN. From inside i would like to pass all traffic destinied to 192.168.0.0 255.255.255.0 to the VirtualPPP IF and al the other to the Internet (vlan2) I have created this rule, but after applying ist works only for about 30 to 60 seconds. after that only the Internet reachable. Everytime i do a clear ip nat trans * both Interfaces will work für 30 to 60 secs again...
This is the relevant part of the cfg
ip nat inside source route-map Di1 interface Virtual-PPP1 overload
ip nat inside source route-map VLAN1 interface Vlan2 overload
!
access-list 1 remark CCP_ACL Category=2
[Code].....
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Mar 5, 2012
I have a cisco asa 5010 where, during the process of configuring, the outside ports become down/down. The /0 port won't even reactivate after cycling power on the unit.Port /1 is the inside interface and it is not affected by the problems.I switched the outside port to port /3 and it worked for awhile then it stopped working. I switched it to Port /2 and the same thing.Port /2 and Port /3 are on after a power recycle but shut down completely (down/down) during the reconfiguration. It seems like a hardware failure, but I'm wondering if it could be anything else.
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Jul 19, 2012
I recently setup a site to site vpn between a asa 5510 and router 1921. It was working great all night and this morning. When traffic stopped rolling through for a few hours the tunnel shutdown. I checked the router using cisco configuration and tells me the tunnel is up. When I check the asa it does not show up in the active tunnels. Any know what would cuase it to drop? and if so what can I do to avoid it.
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Jun 8, 2011
i've an Cisco ASA 5510 with Security Appliance Software Version 8.0(2), in this ASA i've many L2L tunnels to this ASA, anda sometims new tunnels can't connect, the older tunnels still ok and working, yesterday this situation occured again and i've tried to clear all ipsec tunnels and try to reconnect again no one cames up again. At the time of this situation memory usage was about 78% and CPU is was around 5%. I've made a reload without changes and the situation returns to the normality.
At the time of the fail i've collect the outpu from debug crypto isakmp 255, the outpu was in the annexed file.
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Feb 5, 2013
I find are steps to turn on SSH access. I have quite a few customers with ASA5510's installed. SSH is set up and working fine on every one. After a period of time, you are no longer able to SSH into the firewall. Using Putty, it just sits there on a blank screen without giving a "denied access" message or a login prompt. Rebooting the firewall will solve the issue and SSH access works again. Today, I had a customer with and active/standby configuration where I had to reboot both of them to be able to log in. Most of my customers are on 8.2.software as most don't want to reconfigure for the new NAT, etc.
I'm sure others have seen this before since it appears to be occuring on almost every ASA that I have access to. Is there any fix to eliminate this or is there something that can be run from the ASDM that will grant SSH access again without just doing a reboot?
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May 17, 2011
I have a problem with configuring brach router 891 (with IOS v15.0(1)M).I want to connect to HQ via EasyVPN connection (split-tunnel) and allow the local traffic to go directly to the Internet via NAT (PAT).When the VPN connection goes up, NAT stops working and NAT translations don't appear in show ip nat translations. When the VPN connection goes down, NAT begins to work again.
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Mar 8, 2013
I have a Asus n55s. The wireless acts very funky. It sometimes disconnects and stops working. Sometimes, it will stop detecting any nearby wireless networks altogether. Then I have to enable and disable the wireless functionality until it starts seeing nearby wireless networks.
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Feb 5, 2013
I've been having this problem with my laptop's wifi for a while now and it's been getting a little out of hand lately that I can't deal with it anymore. I asked some friends and they seem to have the same problem too but not nearly as often as I do. Every so often, my laptop's wifi just stops working so I turn it off and then turn it back on and it starts working again. My friend says it happens very rarely to him but for me just today it happened 2 times within 10 minutes
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Oct 14, 2011
I'm having is that every few hours my TCP/IP protocol stops working. The modem lights remain normal but I can't connect to anything. The only thing that works on the internet is traceroutes at the command prompt which function normally. The solution is that I have to reboot and then everything returns to normal until a few hours later when it happens again. There are no error messages on any of my browsers. The page just goes white immediately. When I try to retrieve my email, I get a message about the TCP/IP isn't working.
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May 2, 2012
I've got the same problem on my wife's Acer One 532h. Did it get resolved for you, Adrian and if so, how?
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Mar 23, 2011
On Windows XP, my integrated NIC stops working after hosting a server. The server starts fine, ports are forwarded, firewall is down, modem is fine, but when I receive a connection, it shows they have made a connection, but then they drop, as do I. I can't browse or ping anywhere. I have to physically disconnect, then reconnect the ethernet cable to the port, or restart the computer. Upon ipconfig, the adapter is set with the Windows default ip (169.x.x.x) and cannot be /release'd or /renew'd.
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Mar 4, 2012
It's fairly hard to explain what happens but basically, say I'm playing some type of online game, all of a sudden anything server sided such as HP amounts, damage amounts, etc. just disappears but the animation runs fine such as attacking being hit, etc. All of a sudden it'll jump forwards and I'll take any damage and do any damage that had been happening until the issue started. This happens constantly and it's really frustrating but on top of that my internet will slow to a crawl..Say I'm trying to send a message on Skype, it won't send for the longest time and I won't be able to recieve any or even open a new webpage until the problem fixes itself.'ve looked around a bit and thought I fixed the issue, I'm on wifi and multiple devices are connected but not always in use, and the forum I found suggested an ip conflict and said to open up command prompt release the ip with ipconfig /release and then renew it with ipconfig /renew.
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Mar 22, 2012
Once every couple of days the wireless service seems to disappear. I've connected to the router from a wired computer and everything looks ok from the d-link panel, however its not showing up as an available wireless network on the wireless units. Pulling the power off for 30 seconds tends to get it working again. I'm configured bg and n. I need a mix... an old B laptop, have one machine that has a G NIC, and the rest are N.
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May 2, 2011
After buying a new WNDR370. Sporadically and seemingly without any cause my internet will stop working. Diagnostic will always report it as "DNS Server is not responding." I've also discovered that if I enter my router settings and even just switch the DNS settings from Auto to manual or vice versa the problem corrects itself instantly-then next time it happens I just need to do it again.
I've already tried resetting my entire network and rebuilding the recommended way. Modem, Router, then computers-connecting each only after the prior has finished initializing. Hasn't worked though.
Currently I have my main rig connected directly to the modem to try and find out if I experience the problem at all this way, this is a pain in the ass though, and I don't know when long enough is long enough as the issue is completely random and simply just may not happen.
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Mar 5, 2012
I have an EuroDOCSIS 3.0 cable modem from UPC Romania. It's a Cisco EPC3925, wireless modem.
My problem is that most of the time (like 80% of the time) when someone is starting or closing a PC that is connected using a wire, the whole internet crashes (wired PCs get a ! sign and the internet stops working and wireless PCs are getting disconnected completely from the network being unable to reconnect). This is solved by restarting the modem (unplugging/replugging it) or waiting for it to reconnect. I want to mention that during this process the modem lights show that everything is ok and nothing special happens.
First of all I called UPC technical support and the man there said that I should try to disable the firewall from the modem (which I had disabled already), if it won't work then to try to reset the modem to the factory settings (as I was thinking to do - because I configured the settings as I wished) and if this won't work then calling them back to change the modem.
I tried to reset to the factory settings and that didn't work at all after running tests over one week. After that I called UPC and they said that the modem is for sure the problem, they sent a technician (today) who also said that the modem is the problem. Ok ok, the technician replaced it and everything seemed to be good.
30 minutes ago my father started his PC and what should I see? Bam, internet crashing. 5 minutes ago i closed as well my PC and what should I see? The internet crashing again.
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Mar 3, 2013
My Cisco 871w still stops working once a week.Today I found it frozen, after the weekend, and I have executed few commands from the HyperTerminal .The commands were given by cisco coleagues in previous post :show logshow ip int briefshow interfaces counters errorsshow interface FastEthernet1show interface FastEthernet1 statshow interface FastEthernet1 summaryshow interface FastEthernet1 switching
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May 11, 2012
I have setup a Cisco SR520W and everything appears to be working. After a few hours, it looks like the WAN port stops forwarding traffic to the Internet gateway IP of the device.If I unplug and then plug in the network cable connecting the WAN port of the SR520W to my the modem, traffic startings flowing again. Also, if I restart the SR520W, the traffic will flow again.
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Jan 3, 2012
I have a PIX 515e (8.0 (2)) and 1841 router (12.4(25)).I had the following setup working without issue:
[Internet] <-----> PIX <-----> 1841 <-----> [LAN]
I then tried to introduce VLANs and now I can not reach the Internet from the LAN. It seems that no nat translations are taking place.
-I can successfully ping the LAN from the PIX.
-I can successfully ping the Internet from the PIX.
-I can successfully ping the PIX inside_lan interface from the router
-I can not ping the outside interface from the router
-I can not ping the Internet from the router
I introduced the LAN side VLAN first and everything still worked. However, once i introduced the VLAN between the router and PIX, things have broken down. [code]
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Feb 10, 2013
My computer runs bit torrent almost all the time, sometimes when I start Firefox the home page google never loads and neither do any other web pages yet bit torrent is still working as if nothing has changed. If I start a download in Firefox come back to the pc a few hours later Google doesn't load but the Firefox download still continues.What causes this is it DNS ?
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Mar 11, 2011
My internet (wired and wireless) usually works fine, but occasionally (read: every few days to weeks) the connection will suddenly black out for a period of time, anywhere from an hour to a day. I have tried resetting both my router and modem, and going through all the settings on my laptop, but I'm pretty sure it's not my computer, as no other devices can connect either. During the blackouts, when I look at the modem, the internet light will turn on for a second, then go off and then the red "alarm" light (aka "something is wrong" light) starts blinking like crazy, and this keeps repeating. This resolves itself after anywhere from a few hours to a whole day and everything is normal again. The light show, and the fact that I can't find any other problems, leads me to believe that it could be a problem with my provider (or the network itself) and not a hardware or software problem, but I can't be sure of this.Also, during the blackouts, I can connect to the network, but it shows that limited connectivity symbol (exclamation mark thing) and says no internet.
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Jul 17, 2011
I have a problem with a wireless adaptor on a Toshiba Tecra (A11-1EE - PTSE0E-065052EN) running Windows 7.The wireless adaptor works fine but every now and again it will just stop working. The operating system says that the adaptor is turned off but it isn't. I've checked the driver but it is up to date.I have to disable the driver and then enable it again and then the adaptor begins to work correctly again.
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Jun 17, 2012
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft� Windows Vista� Home Premium, Service Pack 2, 32 bit
Processor: AMD Athlon(tm) Processor LE-1660, x64 Family 15 Model 127 Stepping 2
Processor Count: 1
RAM: 2045 Mb
Graphics Card: NVIDIA GeForce G210, 512 Mb
Hard Drives: C: Total - 292284 MB, Free - 43340 MB; D: Total - 12958 MB, Free - 1819 MB;
Motherboard: PEGATRON CORPORATION, NARRA5
Antivirus: AVG Internet Security 2012, Updated and Enabled
So here's my setup:Computer A is connected directly to a cable modem box via USB. Computer B (which is sometimes a laptop and sometimes a desktop) is connected to Computer A and shares its internet connection via Ethernet because I am too cheap to buy a router.A few days ago we borrowed a Belkin wireless router so we could have both desktops, the laptop, and my fiance's iPod Touch access the internet at the same time. That worked fine but once we returned the router and tried to put everything back to normal, it didn't work. The only computer able to access the internet is Computer A (or whichever one is directly connected).I tried resetting the modem and restarting both machines. I tried disabling all of the connections that showed up from using the router.Windows states that the IP isn't properly configured or something of that nature. I tried setting it to automatically set the IP but to no avail.Here is the part that really confuses me - I can access Computer B from Computer A via LAN using the ethernet cable, so the connection between the two computers is fine.
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Feb 22, 2012
I have a Comcast Motorola Surfboard rental modem. It works fine, great speeds etc etc. It has no router or bridge support.
I use this modem to connect to the web on my ps3 and PC. What I have been doing is simply unplugging the ethernet cord from one device, and putting it in the other device to switch. But of course things can't be simple...
Every time I switch devices, the modem tries to reconnect and does a cycle where every time it only reaches the "Send" light. So I have to power cycle my modem and wait about a half hour before my connection resumes...
I read something about PPPoE, but Comcast doesn't even use it so that won't work.
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Oct 11, 2012
Router randomly stops working and sometimes reconnects by it self and sometimes I have to manual reset the router. Also I only get 2-3 bars wireless. Is my router not configured properly or damaged?
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Nov 10, 2012
I have a windows vista pc networked to a second pc. I have wirelessly networked internet to 2 laptops. I have an actiontec wireless modem by verizon. All of a sudden my host pc started randomly losing internet connection, but the wireless laptops still have a signal. It seems like the host sometimes can't "see" the modem.Here are my settings while the internet is functioning.Microsoft Windows [Version 6.0.6001]Copyright (c) 2006 Microsoft Corporation. All rights reserved.[CODE]
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Mar 24, 2011
I have a TL-WR740N router, and the problem is that when I shut down my Desktop PC wherein the router is connected, the devices that are connected via Wi-fi can't connect to the internet anymore even though the router is still ON.
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