Cisco WAN :: 1841 BPR With Router And Firewall
Oct 20, 2012
In my company, we have two Internet connections, one for VPN and the other for emails and browsing. I have Cisco 1841 router with dual ADSL links, and also it's conntected to ASA and the other PIX. through one physical interface (vlan 1and vlan 2). The PIX firewall is connected to users, and the ASA is for VPN only.How can I seperate the traffic is going for emails and browsing and the vpn traffic. I have got to the point, that the router is configured for both ADSL connections, and I also configured the access-list and route-map in the router, the thing is when both ADSL configured together none of them works.
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Feb 11, 2013
Configuring Cisco 1841 router and firewall.My provider has put their equipment and given me 2 subnets with public ip address. I am used to getting just one Subnet and connecting my firewall straight to the hand off. But in this case I am a bit confused. I assume I will need to put a router and configure it with before I connect my firewall. [code] I also have a firewall that I would like to be on the subnet 2 at 200.xxx.97.130 and have my private network 192.168.xxx.xxx behind it.
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May 9, 2013
my 1841 router can't resolve dns after enable ios firewall, I try to ping google.com from router's console fail, but dns resolution is fine from lan side.
my partial config---------------------------------
!
ip name-server 8.8.8.8
[Code].....
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May 26, 2013
We have a setup of a firewall in between my Cisco 1841 router and Switch.
Cisco Router --> Meraki Firewall--> Switch
Client VPN is configured on the Meraki Firewall but then for the outside users to client vpn in to the network, I have to port forward or open the ports 500 and 4500 to the IP address of the Meraki Firewall 192.168.1.90. [code]
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Nov 11, 2012
The other day I set up a firewall on my Cisco 1841 router, it all seems to work fine except for a few small problems. 2 wireless devices an iPhone and an Android tablet are having some problems with 1 or 2 apps. iPhone 6.0.1 Facebook app and the App store will not load Android tablet ICS BBC iPlayer and Google play app store wont load or play content. Both devices with their issue were working fine until the new firewall was installed. I’ve tried opening ports and adding ACLs but nothing seems to work. I’ve included my start up config. All other PCs, laptops, smartphones and iPads work fine.
Building configuration...
Current configuration : 5551 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
[code].....
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Jan 3, 2013
I have a cisco 1841 router , and i want to configure zone based firewall on it. But the document of zone based firewall only said that "after 12.4(6)T" can support zone based firewall. I use the ios " c1841-ipbasek9-mz.124-15.T9.bin ", but it can't support ZFW. What kind of ios support ZFW. for example: ipbase, ent base, ip service ,advent etc.
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Feb 13, 2012
What is the best way to deploy the IOS firewall feature?I have a Cisco 1841 router running 12.4.
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Apr 2, 2012
I have a Cisco 1841 serving as a connection between my ISP and my Firewall (non Cisco).
I seem to be having performance issues with my traffic going through the Router.HTTP (web browsing) is fine andI get my download rate as I would expect for a 10mbps connection.But anything to do with my VPNs I find a delay when sending via the 1841.(all my VPNs are managed by my Firewall and I have never had problems with those).
I also have a legacy ADSL connection to my firewall, which bypasses the 1841 and I am having no issues on that at all.If anything it is quicker! Which is madness as my Fibre should out-perform it easily.This leads me to believe the issue is not with the Firewall.
My 1841 is very simply setup, 2 fa interfaces with simply a default gateway setup within it.Which leads me to ask if I need more static routes in or a dynamic route protocol setup?
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Feb 27, 2012
I am trying to figure out how to use a Cisco 1841 IOS router to take traffic from one interface and source NAT it out towards the Internet on one interface and at the same time NOT perform NAT when sending the traffic towards a different routed interface.
Here the RemoteSite has connectivity back to the MainCampus, but there is no need to NAT traffic from the one site to the other. They share the same umbrella of address space. However, the RemoteSite needs to have its Internet-bound traffic NAT'ed out to the Public Internet via a third interface. I know that I could just NAT everything out from the Remote Site and map the traffic back onto the same address space for intra-campus communication, but I'd rather avoid that and just NAT where I need to NAT it to the Internet.
I do have a caveat here: in the event that either the MainCampus or the Public Internet interfaces go down, I would like to failover traffic from the downed link to other good link. For example, I want to NAT all traffic (including "intra-campus" traffic) out via the Public Internet if the direct link to the MainCampus is down. For the other example, if the Public Internet direct link is down, I would just send out all traffic without NAT towards the MainCampus.
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Apr 6, 2011
I have configured a Cisco router. I am able to ping google from rotuer. I can ping my local IP from router and router local IP to my machine. But I can not access internet on machine. I can not ping google and any other IP out of network.
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Nov 27, 2011
I have a Cisco 1841 router with an HWIC-ADSL module installed. My ADSL connection is PPPoA with a dialer interface and I have been provided 6 ip's from my provider to use on this service. Previously I have connected Fa0/0 on the 1841 straight onto my network and used NAT and ACL's on the 1841, I would now like to change this and have Fa0/0 connected to a Palo Alto firewall and use the Palo Alto to provide NAT, Firewall & site to site VPN functions. What config would I require on the 1841 to allow me to use one of my ISP IP addresses on the Palo Alto to allow it to be a VPN endpoint? Do I need to configure the 1841 in bridge mode?
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Apr 21, 2013
I am trying to figure out how this works. I have an ISP device that connects to my 1841. ISP and fa0/0 hold the /30 WAN addresses. Fa0/1 hold one of the public IPs, lets say 1.1.1.1/29. Then the outside interface of the ASA holds 1.1.1.2/29. Now I have two routes in the 1841, one for default route going back to the ISP device, and a route for the 1.1.1.0/29 network going to the ASA.Now I have 4 more publics I can use 1.1.1.3 - 6. I do not want to assign these IPs to the servers, but yet just NAT them. I know this is possible, but cant figureI took an internal host and did a one to one static NAT from private to public. Packet tracer says my NAT rules are ok. Allowed all IP traffic for testing and still can't ping the server.
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Jul 15, 2011
I am going to design one network. I had queries with this design.Let me explain scenario first( it was attached below).I have two sites, Site-A and Site-B, repectively.
In site-A i have one Cisco 1841 router, one Cisco ASA 5510 firewall and One cisco 3560 layer 3 switch.
in site-B i have one Cisco 1841 router, one Cisco ASA 5505 firewall and One Cisco 3560 layer 3 switch.
From ISP side
I have point-to-point leased line between sites A and B. And both sites have internet connectivity from another ISP.
I planned to terminate leased line in cisco 1841 router in both branches for branch to branch connectivity.
I will configure site to site VPN between two sites, A and B.
Here my query was i want make VPN as failover connectivity if leased line fails. In both the cases, i need internet to the inside users in both sides.
Summary requirement:Leased line is Primary and VPN is Back-up, if leased line fails. In both cases internet is needed to inside users.
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May 6, 2011
I can't find any specific information on the implementation of packet inspection in a zone based policy firewall. In other words, is there a specification or even just a set of values that define the default inspection parameters for all protocols? With DPI I can manage 'some' of the inspection capabilities but I have some fairly rigorous and specific requirements to meet and I need to validate that the IOS ZBFW will meet those requirements. Specifically, I'm interested in HTTP, DNS, and ICMP but all other protocols would be useful as well.I'm working with basic routers; 871's, 2811's, 1841's, etc. The IOS in use in most cases is adventerprisek9-mz.151-3.T.
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Dec 11, 2012
i am using a Cisco 1841 with subinterfaces instead (NAT on a stick).From the internet i can access services on public IP being hosted in LAN2. But when i try to access the same services on the same public IPs but sitting on LAN1, it does not work.
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Dec 11, 2012
i am using a Cisco 1841 with subinterfaces instead (NAT on a stick).From the internet i can access services on public IP being hosted in LAN2. But when i try to access the same services on the same public IPs but sitting on LAN1, it does not work.
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Jan 28, 2013
The problem I am having is very strange and I have tried to upgrade the IOS on the 1841 to solve the problem but no luck. The issue is when I enable Zone Based firewall security on of the 1841 routers two VPN site-to-site tunnels stops working. If I turn off CEF (no ip cef) then the traffic for both tunnels works. Someone told me that the Zone Based firewall must have a match for the VPN traffic and I created that with ACL 160 and 161 but it did not solve the problem.
Current IOS is below.
Cisco IOS Software, 1841 Software (C1841-ADVSECURITYK9-M), Version 15.0(1)M9, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Tue 11-Sep-12 23:58 by prod_rel_team
[code]....
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Apr 8, 2011
I have 2 cisco 1841 routers the one is connected to my local network and the other is the stub router and it only has 2 fastethernet interfaces. fao/1 connected to the local network and fa0/0 connected to the internet and to the other router. How can i configure NAT on the fa0/0 which is sharing the internet and local network
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Apr 26, 2011
1841 & 3845 router. We send 30 GB data on 100 Mbps link. First time we use 3845 router for sending the data and 47 Min are required to complete the data, during this link utilization was 100%. After that we send same data through 1841 router & 46 Min are required for the same. Only difference in data transfer is CPU Utilization of 1841 router goes 30% & 5 % of 3845 router Can we use 1841 router instead of 3845 router ? .
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Nov 11, 2012
I have got a cisco 1841 router. I need to do many nat. I have got a lots of virtual interface on this router. How many nat inside and outside does it supports ? Can I do more than one nat insdie and outside in different virual interfaces on the same single router.
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Aug 28, 2011
A client was having some email issue and was requested to change the 1841's LAN and WAN interface MTU to 1400 bytes. i've used 'mtu' command but was rejected and got an error like to one attached. so i used 'ip mtu' instead to make the change.
What's the difference between the 2 commands and if this would achieve the said change. I've checked using the show interface it's still showing MTU of 1500 bytes.
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May 16, 2011
I m trying to make the vpn session using m GRE tunnel between cisco 891/k9 and 1841 router.. there is the fixed ip add with the 1841 router, and another one doesnt have the static ip from the ISP, In this case, im going to use DMVPN, The problem is , after completing the configuration, the tunnel inteface of the 1841 router will be seen like this.
-status: reset
-protocol: down
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Mar 31, 2012
I want to connect my office network through anyconnect software and want to have the access of the whole network at my office, so that I can feel that I am at office. I have got 1841 router at my office. Is it possible to do VPN with anyconnect on 1841 router. Which IOS is required for SSL vpn ?
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Dec 2, 2012
We have 1841 router (Cisco IOS Software, 1841 Software (C1841-ADVSECURITYK9-M), Version 12.4(9)T1, RELEASE SOFTWARE (fc2)), currently the router up and running on "c1841-advsecurityk9-mz.124-9.T1.bin" and when we try to upgrade the IOS with "c1841-advsecurityk9-mz.124-24.T7.bin" its not taking the new IOS. [code]
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Feb 13, 2011
when I start the router , I can't enter the IOS , and it enther the ROMMON mode , the error display probably is : the flash is invalid.I want to import an new IOS into the flash, but it says the space is not enough.how I confirm the flash is broken?It's any other ways to solve this problem except to change the flash?
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Dec 24, 2012
setup a vpn server cisco.
device cisco router 1841 [URL]
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Jun 30, 2011
i am very new for WAN failover configuration so how to configure cisco router 1841 with two WAN link.
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Aug 24, 2011
I have a 1841 Router running C1841-ADVIPSERVICESK9-M ver 12.4(12), is this IOS VPN capable, if not what IOS would I need to run a VPN?
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Feb 24, 2012
I have a problem with 1841 router - It wont't boot up and there is a message
Correcting primary nv_flash
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Mar 18, 2011
I have a Cisco 1841 router equipped with a serial interface and an ISDN BRI interface installed.The router has stopped suddenly responding and no display is beig obtained when trying to access the router through the console port.I have check the router LEDs and they display the following:
SYS PWR - It is showing solid green which means the router is receiving power, and the internal power supply is functional. It is not blinking green as is normally the case when the router is rebooted.
SYS ACT - It is showing solid green. It should normally be blinking green showing that the system is actively transferring packets and monitoring internal activity. CF - It is showing solid green. It should normally be off indicating that the CompactFlash memory card is not being accessed or be blinking green showing that the CompactFlash memory card is being accessed.
I have even replaced the CompactFlash memory with another one and removed the two WICs installed but the router still fails to initialise properly and respond through the console terminal program. how the router can be further troubleshooted or if it can be repaired?
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Jan 30, 2013
I wanted to know how many sodium memory slots the 1841 Routers have so i can upgrade to more then 128mb of DRAMI want ideally 256+on the Cisco website in the diagrams they dont say if it has 1 or 2 slots
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Feb 1, 2011
Can I configure a cisco router 1841 to block specific sites?
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Mar 13, 2011
I have an issue with NAT on a Cisco 1841. See following configuration,
interface FastEthernet0/0 description Connection to LAN bandwidth 100000 ip address 10.90.0.100 255.255.0.0 ip helper-address 10.100.2.2 ip helper-address 10.100.2.3 ip load-sharing per-packet ip nbar protocol-discovery ip nat inside ip virtual-reassembly duplex auto speed auto
interface Dialer1 description ADSL connection bandwidth 448 ip address X.X.X.X 255.255.255.248 ip access-group 150 in ip nat outside ip inspect firewall out ip virtual-reassembly encapsulation ppp dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap pap callin ppp chap hostname hostname ppp chap password password ppp pap sent-username hostname password password crypto map vpn
ip nat inside source list 102 interface Dialer1 overload(code )
I've tried this with both a source list NAT statement, and a route-map. The router can contact hosts on the Internet:
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 128.31.0.51, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 144/147/148 ms
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