Networking :: Cisco 2621 ACLs Blocking All Deployments
May 9, 2011
How would I go about only allowing the traffic that I have acl's set for and blocking any other traffic?
Just as an example say I have an acl that allows traffic from 192.168.1.0 to 192.168.2.10,How would I go about setting it up so that no other traffic can occur such as http traffic from 192.168.3.20 to 192.168.1.10
I'm hoping there's a way to deny everything and then only allow what I want. It would seem crazy if I would have to deny every single protocol from every possible action.
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Sep 1, 2011
The SMART Designs state that both the ESW500 and 300-series switches should not be used for deployments of over 100 IP phones.But now that both the UC560 can go up to 138 (128 IP phones) and the BE3000 can go up to 300 users is this design restriction still valid or is the Catalyst 2960 and above the only options?
The QPT is still showing both the 300- and ESW500 switches as options for all versions of the UC560, and the 300- and 2960 switches are shown as valid options in the LAN for the BE3000.
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Feb 16, 2005
i have spent a few hours trying to NAT out a few intenal 192.168.x.x hosts through both my ethernet1/0 interface and also tryed using another IP from the range.
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Aug 22, 2012
I've got a Cisco 2621 with this IOS image in flash: c2600-i-mz.120-7.bin (the only IOS in flash). When I power up the router, the following errors occur:
open: file "n" not found
open(): Open Error = -1
loadprog: error - fileopen
boot: cannot load "flash:n"
I have to press "Ctr l" and "break" to enter Roman, there i can use the boot command to start the IOS. Configuration register is set to 0x2102, all running config should be factory default.
What I have to do to boot the IOS directly when i power up my router (without entering Roman mode...)?
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Sep 21, 2011
tell me the IOS (c2600-???) needed to be able to do MPLS on the 2621 XM router?
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Jan 26, 2012
I have a 2621 with a WIC-1ADSL that connects to my ISP. Since the 2621 has 2 ethernet ports, I wanted to setup a network on the second ethernet port for testing things such as VPN into my network via my ASA5505. I have a DHCP pool set on the particular network but cannot get a client to get an address from the router. I think I might have an ACL that is blocking or need an ACL to allow bootp on the interface. Here is the config:
Building configuration...
Current configuration : 4144 bytes!version 12.3no service padservice tcp-keepalives-inservice tcp-keepalives-outservice timestamps debug datetime msec localtime show-timezoneservice timestamps log datetime msec localtime show-timezoneservice password-encryptionservice sequence-numbers!hostname r01!boot-start-markerboot-end-marker!security authentication failure rate 10 logsecurity passwords min-length 6logging buffered 4096 debugginglogging console criticalenable secret 5 SECRET
enable password 7 password
[code]...
When I try to get an ip address from a client, I never receive one. But when I issue dhcp server statistics, I can see packets hitting the interface:
r01#sh ip dhcp server statisticsMemory usage 14050Address pools 1Database agents 0Automatic bindings 0Manual bindings 0Expired bindings 0Malformed messages 0Secure arp entries 0
Message ReceivedBOOTREQUEST 0DHCPDISCOVER 68DHCPREQUEST 5DHCPDECLINE 0DHCPRELEASE 0DHCPINFORM 0
Message SentBOOTREPLY 0DHCPOFFER 0DHCPACK 0DHCPNAK 5
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Jun 13, 2011
I purchased a Cisco 2621 with IOS Version 12.3(26) on it. When I went through the commands, I couldn't find any VLAN or VTP available. I need to make sure I can see this on the device in order for me be able configure VLAN on my network and get ready for my CCNA exam.
Below is the version on the device and I also attached the available commands:
Version: IOS (tm) C2600 Software (C2600-I-M), Version 12.3(26), RELEASE SOFTWARE (fc2)
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Sep 4, 2012
Which version of IOS for the 2621 supports NAT?
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Jul 27, 2011
I have a 2621 router, because I want an image of about 21M, I upgraded as follows:
IOS = 32M
RAM = 64M
ROM VERSION = 12.2
However, when I power up my router, it goes into a boot loop, and I see the following messages:
NOT ENOUGH MEMORY IN THE SYSTEM TO RUN THIS IMAGE
***SYSTEM RECEIVED A SOFTWARE FORCED CRASH***
how to overcome this error, and successfully upgrade, so I could load my new image?
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May 21, 2013
I need to add another fast Ethernet port to an old 2621 router, I need a NM-1FE-TX OR NM-1FE-FX-V2 ??
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Oct 21, 2004
I have a cisco router 2621 when i install the module cisco NM4T it is not detectetd. following are the outputs.i have tried IOS 12.2.15T15 & 12.3
booting up:
smart init is sizing iomem
ID MEMORY_REQ TYPE
0000A2 0X00103980 C2600 Dual Fast Ethernet
[Code]......
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Nov 26, 2011
I'm trying to figure out the best design for my network. I currently have a setup like this:Internet - Cable Modem - Pix 515E (doing NAT) - 2621 - Internal Network.Now, should I have the 2621 as my edge device or the Pix?
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Apr 20, 2013
I have a 2621 router - old. but works well.Need to put in an ACL to limit the inbound SMTP traffic to be FROM a specific set of IP's, and deny all others.
I have tried various combinations with no luck. Something obvious, I am sure.
When I do a show access lists 160 it shows all SMTP traffic being snagged by the SMTP deny statement. All other traffic works correctly.
Here is my config so far...
Current configuration : 3093 bytes!version 12.2no service single-slot-reload-enableservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname xxxxxxxxxx!logging rate-limit console 10 except errorsenable secret 5 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx!ip subnet-
[Code] ....
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Nov 3, 2011
The config I am posting is from a 2621 router. This routers Int fa0/0 connects to AT&Ts OPTEMAN 10Mbs Ethernet interface. The other end connects to our HQ router. At HQ is our PRIs and phone switches. I have configured QoS for this router, but don't I have to link them to the ingress interfacce (Int FA0/0)?
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Dec 19, 2011
OPTEMAN: 3 routers connected via a private subnet (/29) over the OPTEMAN: Site A, Site B, and HQ. Site A is a 3560 that is the gateway for two subnets: siteA1 and siteA2. SiteB is a 2621, and HQ is a 6509 w/ MFSC.
HQ also connects to 4 other sites via MPLS: SiteC, SiteD, SiteE, and Site F.
HQ has the server subnet, Internet connection, and connection to other services via MPLS.
I have basic EIGRP setup on HQ, SiteA, and SiteB. So far only siteA and HQ are updating each other. Not sure why. I am looking for the best practice example of how I should setup my enterprise EIGRP. I currently use static routes between the sites. I would prefer to be able to setup EIGRP in parallel, the remove the static routes.
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Mar 9, 2006
I have a spare 2621 sitting on my desk and i would like to run a little experiment. i had two LAN segments that are seperated right now, but would like to stick this router between them and route traffic between them?
Current configuration : 1221 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption(code)
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Jun 19, 2011
I'd like to set up a downloadable ACL from my ACS 5.2 server to be applied for users authenticating for just one of my SSIDs / WLANs.
I intend to use this primarily for mobile devices to allow them to go to any of my physical locations, connect to the same WLAN regardless of location and then get the same downloaded ACLs (filtered based off of destination port and address) applied in each case.
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Apr 26, 2012
I have a cisco 2811 router doing nat on my home network and it works fine.I've connected a cisco 2621 router to the 2811 both have serial T1 cards, I have enabled IP routing on both and have eigrp 1 process running. I can ping and telnet to each router and they are advertising the networks on each other. when i do a traceroute on the 2621 to an outside address or name example [URL]I get no reply.
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Dec 13, 2010
I have some internet users who listen to online vedio music and and other streamin program so my network goes very slow and bandwidth consumtion is goes very high.in this situation i have no any firewall, how i can stop vedio streaming by cisco 2621 router.i have been configured to stop the bittorrent and it successfully done class-map match-any peer-to-peer match protocol gnutella match protocol kazaa2 match protocol fasttrack match protocol novadigm match protocol edonkey match protocol bittorrent match protocol rtp match protocol rtsp!!policy-map peer-to-peer class peer-to-peer drop?
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Jul 24, 2012
I have a 2621 that I am configuring on the internet. My ISP gives me a static DHCP assigned address and then two more static addresses that are not part of the same block. (e.g. 1.2.3.4 is static via dhcp and then they give me 5.6.7.8/30).
I have fa0/0 getting 1.2.3.4 ia dhcp. I have 5.6.7.8 on a loopback interface for PAT/NAT as I have the main one on fa0/0 doing vpn to a remote ASA. The problem is that I have yet another device that needs a public IP, mainly 5.6.7.9... I want to hook that device up to fa0/2 (this box has three fa interfaces). How do I setup fa0/2 if I want to give the device on it a real live public IP address? I have done this before, but it must have been 10 years back on an even older CISCO and I can not remember how I did it.
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Mar 20, 2012
We have an existing Cisco 2621 XM router with an ADSL interface connected to BT Broadband. Basic layout below:
Internet------ADSL on Cisco 2621 ------ Pix 506e ---- 3600 switch with inter VLAN routing to multiple VLANS
There are 5 static IP addresses. The internal FE port on the 2621 has one external assigned to it. The outside int of the PIX has another external IP assigned from the 5. The other 3 are NATd through to internal IPs via the PIX to internal servers etc.
The ADSL is being upgraded to BT Infinity. This new service comes with a separate VDSL modem and a separate BT router. Ideally I want to ignore the BT router and use the Cisco 2621 as it has 2 FE ports and I suspect I could do something using PPPOE.
So New layout would look like
Internet ----- BT VDSL modem------ Cisco 2621 ----- Pix 506e ---- 3600 switch with interVLAN routing to multiple VLANS
I think it is a bit strange the way it is setup as 2 static IPs cant be used. There is an opportunity to use a ASA 5505 which may become available.
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Apr 9, 2011
I'm moving into a new data center. I don't consider myself a network engineer or anything but I do understand the basics. The new data center I am moving into routes my network to me a bit differently than my old data center. The IOS on the Cisco 2621 is: c2600-i-mz.123-26.bin
I am assigned a /29 block which they configure as the routing network, it looks like this: Routing Network: A.A.A.0Routing Network Sub net Mask: 255.255.255.248Routing Network Def Gateway: A.A.A.1Customer Usable Address: A.A.A.4
I've been assigned a /28 block which is B.B.B.240/28. They stated that in order for me to use my allocated blocks, I had to act as my own gateway, routing the traffic through the routing network. This goes just a bit beyond my networking knowledge, though I still understand it, I just don't know exactly how to execute. I'm assuming my 2621 with 2 Fast Ethernet interfaces should be able to handle this routing scenario.
Any sample configs, or possible a link to a how to to get this setup? I was going to use FreeBSD to do the routing, but a appliance based Cisco router is much more attractive of an option to me.
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Feb 13, 2013
I'm screwing around with HSRP running between two L3 interfaces of routers. I placed an inbound and outbound ACL on the same interface on both of these routers specifying to "permit ip any host 224.0.0.2" Why am I only seeing counters ticking for the inbound ACL of both of these routers? Is it an order of operations thing?
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Jan 23, 2013
I'm almost afraid to post since my stuff is so OLD! I have a 350 Series PCI Wireless LAN Adapter in my old WinXP, not wireless-ready Compaq.I live off the grid, no landlines and have been using a Franklin CDU680 USB air card to connect to the Internet. The air card doesn't like my Compaq - occasionally crashes it. I thought to put the air card in a router to solve the problem and communicate with the router using the Cisco 350. Bought a Cradle Point router from my ISP and plugged in the Franklin. Then spent the next 5 days trying to get the Cisco 350 to associate with the router.I now have a profile with the router's SSID in it that according to the ACU's status report is associated with that SSID. Problem is that there is no Internet connection.
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Dec 11, 2011
My main issue was trying to connect virtuelly via GNS3 and my router setup on it. I have three Cisco 2621 XM routers set up. They all came with 2 Fast Ethernet ports. However, only one of them has a Serial port. So, what I'm doing is connecting the routers together with the fast ethernet ports using crossover cables. So, I baselined two routers to start with. Very simple AAA, set up IP HTTP server, IP HTTP Secure Server, etc. Privledge lvl 15 access, etc.
I then set my Router A's inside Fa0/1 port with a 192.168.1.0/24 network. The outside port Fa0/0 is 10.0.0.0/30 network.Router B is set up similar, 192. 168. 2. 0/24 insice Fa0/1, Fa0/0 is 10.0.0.0/30 network outside. So, three networks 192.168.1.0, 192.168.2.0, 10.0.0.0 network. [code] I then repeated the same on Router B, just transposing 2.0 network for interesting traffic, and Peer 10.0.0.2 for the Fa0/0 interface on Router A.When I "test" the tunnel, I get an error message. So, since I'm connected to Router B (which was working, had routing, and had Router A's network 1.0 in it's routing table), the error msg says that I need to add a route into the routing table (192.168.1.0). It was there up until I attempted to put the VPN in place. It's like it stopped the routing.
At face value, it looks like this should be working! But when I debug the ospf process, it looks like hello packets aren't tranversing across to the other side. Is it because I just have the 192.xxx.xxx.xxx networks as "interesting" traffic? Can I have multiple networks marked as "interesting"? I thought that's what the peer statements were doing to allow the tunnel to be established.
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Dec 26, 2012
I have a Cisco ASA5505 with Frontier ADSL. I broke into their crappy little modem and obtained the settings needed to replace their modem with a 2621 router with a WIC-1ADSL module. I have a static IP from Frontier which is on my ASA5505 and the Dialer interface on the 2621 gets its address from Frontier via DHCP. There are devices behind the ASA which I need access while in the field, IP Cameras, Seed Treater, etc., so I have Anyconnect running on the ASA and can access everything from my laptop, iPhone and iPad from whereever. The issue arises when my laptop is in house and communicating with my parent company and I try to make a cell phone call off the network extender. The call is choppy since there is no QoS and the data is strangling the voice. Since I have control over the 2621, I added another network and NAT it into Frontier without them knowing. I have since placed the network extender on this network as well as a WAP200 that is wide open for my customers when they are in the office. Doesn't fix the problem but...
I have now added Evertek Wireless internet with a static IP also but they use a reservation based on the MAC Address of my interface of the ASA. This plugs directly intot the ASA via ethernet (I would assume their antenna is just a wireless bridge). I set route tracking on the Evertek side and use the Frontier as a backup and all devices on my NAT network still funcion on Frontier DSL and all my nornal data traffic is out Evertek. The issue is that the Evertek Wireless is not very fast or reliable (today in during a snow storm, it could barely keep an internet connection). And I had a problem with Anyconnect using either connection. I got that working. But think that the "ip address x.x.x.x y.y.y.y dhcp setroute" on the Evertek side messed things up from a routing standpoint when I would connect from the outside on the Frontier side. For testing, I switched the tracking around and now the connection on the Frontier side does not work but that is besides the point.
Frontier is going to try out an ADSL/2 connection next week which brings up another issue; all Frontier connections come into my buidling on a single 4-pair wire so if they go down, all my internet except the Evertek goes down. I have a Raven Slingshot coming for installation shortly that cannot go down; it will provide RTK (sub-inch accuracy GPS) to my customers that have auto-steer and auto-shutoff capabilities in their tractors via cellular data modem. So, while they are planting their crops in the field, if my connection goes down, their tractor will not function.
I also had a Cisco UC320W but it died a few days after it went off warranty so I replaced it with a Dell Server running 3CX IP PBX that supports Cisco SPA525G2 and SPA501G IP Phones. There is a 3CX iPhone app that allows me to receive calls while in the field, it uses a proprietary tunnel that I have open on the ASA. With 4-pair coming into my building, I will be left with a single 1-pair for phones so I am considering a SIP provider instead.
Can/should I move the Evertek ethernet to the third ethernet interface on the 2621 and track the Frontier DSL against the Evertek (backup) on the 2621 side and use the ASA to track the ADSL/2 against the 2621? Should I acquire an 1841 (or some other device that suppports the HWIC) with a ADSL/2 card and use HSRP between the 2621 and 1841? Is that even possible?
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Mar 18, 2011
This "IPS configures your router's ACLs" thing seems like a bad idea to me, other than letting it be it out of line and reducing your IPS's load abit doesn't really seem to really give you any real benefits..
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Oct 15, 2012
Is it possible to implement ACLs in layer3 switch??
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May 25, 2011
Currently a customer has all theLAN devices using a router as the Default Gateway. The router also do the Dynamic NAT to the internet access and has NAT/PAT rules to publish some services like HTTP and FTP. As I know the router will permit all the incoming traffic in all its interfaces without restrictions at less there is an ACLs that restrict the incoming traffic on an specific interface.Now the customer has bought a brand new ASA and wants to use it as the default gateway for the entiery LAN. This means, the ASA will have the internet connection and will be the responsible for the NAT/PAT process.
I have configured the NAT/PAT rules already following the current router configuration, but I need to know if I have to configure ACLs allowing the incoming traffic on th Outside interface for the services I NATed.
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Aug 30, 2012
In the near future I plan on updating all of my firewalls to 8.4, currently we're on a mix of 8.0 and 8.2. I've heard that if your equipment is on 8.2 there's an auto-conversion feature when upgrading to 8.3. However, I do not want to rely on that and am trying my hand at re-writing the NAT and ACLs myself. Attached is my pre 8.3 ASA 5510 config (santized) and a document that shows the particular sections pre 8.3 and what I think they should be after the upgrade.
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Mar 19, 2013
I need some clarification on the differences between a VPN-Filter v an Interface filter.I am using an ipsec crypto tunnel between our site using ASA 5525 and a remote client who are using a Palo Alto Firewall. I have applied a vpn-filter on the tunnel for these sites but I am being told that an interface filter would have been more simplier.
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May 19, 2013
I want to buy an AIR-SAP1602I-E-K9 and I don't know if I can configure a MAC-BASED ACL with this AP, because I must permit the access of the wireless netwok only to determined wireless devices.
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Feb 27, 2013
I'm having a bit of trouble determining the best way to do this... I have 12 V LAN's set up (sub interfaces on a redundant group of two NICs) on my ASA 5510. On several of these, I want them to be able to access the internet but not access other V LAN's.
By default, they have a rule like "any to any less secure", and since the outside interface has a lower security level, this works great. But if I create an ACL on the interface, this rule disappears. I can restore internet access by adding an "any to any" or "(this interface's sub net) to any" rule, but this seems to imply that it allows access to any v LAN. Do I have to create a set of "deny" rules for each V LAN, on each V LAN, followed by an any-any rule to allow internet access, or is there a cleaner approach?
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