Cisco Routers :: RV042 Portforwarding Overrule Firewall Rule?

Nov 1, 2011

We have a setup where our e-mail server is hosted in-house.Our network is connected through a RV042 gateway. Port 25 is forwarded to our internal e-mail server.Our smtp service should be limited to receiving incomming connections only from 4 specific ip ranges which I set up in the firewall rules.The reason is that all smtp is managed and protected by an external anti-spam/vires provider.
 
However it looks like any computer is able to connect to our port 25 and be forwarded to our e-mail server.Does portforwarding overrule firewall rules - ie. you can not limit access with the firewall if you decide to port forward?Is this a "fixable" situation - or is the RV042 not built for handling this setup?

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Cisco Firewall :: Rv042 - Firewall Access Rule

Jun 3, 2013

I have a server behind an rv042 that i would like to block access to on one port from outside in.  I have configured the rule as follows:
 
priority = 1.  policy name<name>.  enable<checked>.  action = deny.  service <service to block>. source interface = wan1.  sources = any.  destination = <public ip address of server>.  day <nothing>. 

This does not block the intended port from outside.  I also changed the destination to be the private ip address and i changed the source interface to LAN and to *.  What is the correct syntax to do this?.  Port forwarding is enabled.  I noticed that there is one entry in the forwarding table for the public ip but it is going to a dead private ip address.  Would this have an effect? 

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Cisco Switching/Routing :: RV042 - Firewall Blocks Ports Though Access Rule

Dec 10, 2011

I have a Cisco RV042 Wired Router. I've got a static IP and a MS Small Business Server in my Router Network. I have forwarded the essential ports to use the IIS and the Exchange Server of my SBS2011 (HTTPS, HTTP, smtp, rpc). I have also created some access rules for these ports, but I don't have any access on my server services, if the firewall is activated.
 
Here are my Firewall Access Rules from the RV042 Web Interface:

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Cisco Firewall :: ASA 5505 - Cannot Add Rule Without Deleting Implicit Rule

Jan 18, 2011

what is the purpose of the "Permint all traffic to less secure networks".
 
Well I know the purpose and the technique to handle some sercurity level is nice. when I cannot add add a rule without deleting this implicit rule?
 
The technique of security level is then obsolete?

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Cisco Firewall :: ASA 5505 Portforwarding To Device With Different Default Gateway

Feb 27, 2012

A customer got a new VoIP PBX, and now I have to forward port 443 on the ASA to the PBX for remote administration purposes. The LAN-interface of the PBX is in the same subnet as the ASA but has an external VoIP-router as default gateway and not our ASA. Is it even possible to forward the port to the PBX when there is no route of any sort to our ASA on it?

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Cisco Routers :: RVS4000 Default Firewall Rule?

Sep 15, 2011

RVS4000 has default firewall rule from ANY WAN -> to ANY LAN with status Allowed. Should that be denied by default, like in RV042 or RVL200?

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Cisco Routers :: Rv082 Firewall Rule Not Working

Oct 14, 2011

i have a Cisco Rv082 with Firmware v4.0.4.02-tm (Jul 4 2011 13:30:56)I have configure WAN1 with a public IP and netmask 255.255.255.252. (Only one public IP in use) Internally the LAN is a 192.168.169.0/255.255.255.0.I need to add some rules like

Service: HTTP
Interface: WAN1
From: ANY
To: 192.168.169.2
 
But after rule configured the connection still not working, it only works when I add a port forwarding.For HTTP maybe port forwarding is OK, but other services I need to grant access to a specific public IP address, not to everyone. So I need the Firewall rule, but is not working, it always block the request. [code]

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Cisco Routers :: RV042 Firewall With Windows 8

Mar 20, 2013

I recently bought my daughter a refurshed dell 17" laptop which has Windows 8 home edition on it. She also has another smaller laptop with windows 7 on it, an X-box-360 and a PS3 all connected to this RV042 Business router.
 
I do not have access to the firmware version of the RV042. I believe it was updated in 2011 or early 2012.
 
We found out that with the RV042 firewall set to ON, she is UNABLE to hit her college website with the new win 8 computer
She CAN go to the college web site with the smaller win 7 computer when the firewall is off or on.
 
The win 8 computer will allow google searches, but when you click on any of the links, it will not load.With the win 8 computer, facebook will not load, MSN and Hotmail will not load.
 
Disable firewall, and most (if not all) items that did not work, magically DO work when the RV042 firewall is disabled for the win 8 laptop.
 
Having issues with with win 8 home edition and the RV042 firewall enabled? Is there a "simple" cure for this, other than slicking the laptop and putting win 7 on it?

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Cisco Routers :: RV042 - Firewall And SPI Enabled

Jan 14, 2013

this is regarding my RV042. Its firmware version is v4.1.1.01-sp (Dec 6 2011 20:03:18), unchanged from how I received it. I purchased less than a month ago. I have a problem wherein the firewall behavior is not what I expect it to be, where I expect only allowed ports/services to be open to a given private IP from the outside but am finding that all are open to that private IP!
 
Let me describe the current configuration. I am going to blank out all digits of the public IP addresses when discussing them except for the final digits for security reasons.Router's WAN1 is set up as static, X.X.X.189. This is part of my public IP block. WAN2 is disabled. One-to-One NAT is enabled. Three instances of it are set up. One, for example is 192.0.2.89 (a private IP) mapped to X.X.X.180, a public IP, part of our public block. Forwarding is not enabled. There is no DMZ Host. That is set to 192.0.2.0. Firewall and SPI are Enabled. Access Rules for the firewall are set up in addition to the default rules which are present to Deny all traffic with WAN1 and WAN2 as the source from any source to any destination. This to me means that unless I set up Allow actions, there should be no access from the outside, WAN1. As an example of one of my Allow rules, I have this:

Action: Allow
Service: HTTP
Log: Not log
Source interface: WAN1
Source IP: ANY
Destination IP: Single, 192.0.2.89
Time: Always

My problem: My expectation is that based on the One-to-One NAT setting, the public IP X.X.X.180 is now associated with the private IP 192.0.2.89, but nothing from public to private is allowed unless allowed by the firewall, which is only set to allow HTTP / port 80 to 192.0.2.89. But the behavior is that 192.0.2.89 is, as presently configured, open to everything from the associated public IP, not just port 80, but all ports! It is as if my firewall rules have no impact whatsoever.

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Cisco Routers :: RV042 Firewall Slows VPN Traffic

Sep 9, 2011

Replaced an older RV042 that had damage from lightning. The new RV042 is V03 with firmware 4.0.0.7. This router supports 7 branch offices using site-to-site VPN to other RV042 routers. After connecting the new RV042 at the main office, three of the branch offices had very slow response over the VPN tunnel. I disabled the firewall on the new RV042 and the problem resolved. The three branches with the problem have Windows 7 systems and the other 4 have Windows XP. I confirmed that the Windows firewall was disabled on the Windows 7 systems.I did try leaving the firewall enabled and disabling SPI, but that didn't work. Have to have firewall disabled to resolve the problem. I would not expect the firewall on the main office RV042 to affect VPN tunnel traffic, but apparently it does. Do we need specific access rules to fix the issue. It works fine with firewall disbaled, but I'd be more comfortable with it enabled.

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Cisco Routers :: Rv042 As Vpn Behind Juniper SSG5 Firewall

Aug 25, 2012

I need to configure a new RV042 behind a SSG5 firewall. All VPN connections is client to gateway.
 
Firstly, i tried doing a direct connection(bypassing the firewall), the quickVpn status says connect but I can't even ping the rv. I suspect is due to client own ip is 192.168.1.x and the gateway ip is also 192.168.1.10. How do I resolve this such that users can connect anywhere without having to worry about clash of ip?

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Cisco Routers :: RV042 V3 Firewall Access Rules Configuration?

Apr 8, 2012

I wanna block the Lan IP address(eg:192.168.2.106) to visit wan web, and allow it to lan.How can i set it in access rules?

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Cisco Routers :: RV042 Firewall Page Settings / Interactions?

Feb 5, 2013

I have an RV042 which is being used as an interface to an ISP.The WAN address (public) is obtained via PPPoE.The LAN address (also public) is entered manually from an assigned block of public addresses.  This is the internet gateway for other publicly-addresses devices like firewalls, VPN devices, etc.
 
I have an RV042 to play with as will as one in production that I can access.Because the accesses are both through public addresses, I want to use https to access the device.  I've generated a number of questions as I'm not sure the behavior is understandable to me and maybe the behavior isn't even  consistent.
 
- If the firewall is Disabled, the https setting is still available.  So, presumably https will work with the firewall enabled or disabled?  Is that right?
 
- I take it that the Remote Management setting and port number are associated with the WAN port.  For example, can one set Remote Management ON with port 443 and still access via the LAN on port 80?  on port 443?
 
- If Remote Mangement is OFF then I presume that one cannot access the device through the WAN.  Yet, that seems to not be the case.  I wonder if the public addresses on this device affect this?
 
Well, I guess we might forget about the Port number and just ponder the following - Sort of a truth table:
 
 Remote OFF
    http...........WAN access: NO              LAN access:  YES
    https..........WAN access: NO             LAN access:  YES
Remote ON
    http...........WAN access: YES           LAN access:  YES
    https..........WAN access: YES          LAN access:  YES
 
This is what it would seem to me to be but it doesn't seem to work that way.

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Cisco Routers :: RV042 Firewall Multiple External IP Addresses

Oct 6, 2011

if possible with the RV042.Primary External IP address uses port forwards for some ports, all okay.I would like to have other external ip addresses assigned to machines on my lan.Basic host multiple web servers, on different IP addresses, using port 80. [code]
 
From what i am reading, it looks like the RV042 can do this, but I am not real clear what my rules should look like.
 
I would think my high priority rule for each external IP address would be to deny all traffic first for each machine on the lan.Then create one entry with source 202.x.x.2 port 80 -> 192.168.168.2 ?
 
How should I set my rules to do this, and what settings should I have on the Nic of the second machine?

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Cisco Routers :: RV042 V3 - Port Forwarding And Firewall Rules On WAN 2

Oct 13, 2011

I have a new (about 4 months old) RV042 V3 4.0.0.07 firmware that I am trying to use in fail over mode.  I have a SOHO and I normally use cable Internet connection.  It is quite fast (15 megabit), but not super reliable.  I have added DSL (3.3 megabit) which is five nines (supposedly) but not so quick. 
 
I have a Westell 7500 wireless DSL modem located in the basement, where the telephone lines enter the building.  This gives me a wireless link to the second floor server room through  a wireless router that connects to WAN 2 of the RV042.   The cable modem is in the server room and connects directly to the WAN 1 of the RV042.  The cable works, but when it goes down, the DSL link comes up but does not allow Internet traffic.  The RV042 is set up as a Bridge and I have set up port forwarding to get the cable to work and used similar firewall commands to route the traffic if the router switched over.  I suspect that the problem is in the port forwarding (port 80) or the firewall rules(which are pretty simple) because everything looks like it switches over, but it just doesn't work on WAN2. 

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Cisco Routers :: RV042 Can't Get Forwarding / Firewall And Client To Gateway VPN

Jun 9, 2012

I'm trying to set up a RV042 to do the following:
 
1) Block all WAN connections, except for:

2) Allow all port 80 connections, and forward to 10.4.20.60

3) Allow all port 443 connections, and forward to 10.4.20.60

4) Allow port 22 connections from specific IP addresses, and forward to 10.4.20.60

5) After a remote client has connected using Client to Gateway VPN, allow that remote client to access anything on the LAN
 
I'm able to do #1-4 above, but I can't get #5 to work. Or I can get #5 to work, but can't implement the restrictions I need in #1-4. Attached are some relevant screenshots. I think the problem is that I have Forwarding rules set up that require me to have a firewall rule to Deny All Traffic from WAN1 (unless I'm specifically allowing it). In the Access Rules screenshot, rule #6 is the problem. If I enable it (thereby denying all WAN1 traffic), then VPN clinents can't access anything on the LAN. However if disable this rule, VPN clinents can access anything on the LAN, but the firewall also opens up all outside connections to SSH, since that's set up in the Forwarding rules. I would have thought that once a remote client is connected using client to gateway VPN, then that client is considered to be on the LAN, as far as the firewall is concerned. Thus a firewall rule (like #6) that is specified for WAN1 shouldn't effect remote VPN clients.

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Cisco Routers :: RV042 LAN Subnet Restriction And Firewall Bypassed For One To One NAT

Mar 31, 2013

I have 2 questions to confirm and/or get direction on how to modify.
 
1) is there a way to get around the (seemingly arbitrary) class C (slash 24+) subnet restriction for the primary/main IP address for the internal LAN?

(I realize I can setup multiple internal subnets but that also seems to introduce restrictions for port ‘forwarding’ and ‘one-to-one NAT’ use because those features seem to be restricted to the primary/main IP subnet)
 
2) it seems like all traffic is passed to the host on the internal side of a ‘One-to-One NAT’ regardeless of the firewall rules in place, is that what is be expected?

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Cisco Routers :: RV042 Hardware V 1.2 Firewall Is Blocking Some Incoming Mail

Dec 4, 2011

I'm having an issue where our RV042 router is blocking some of our customers from sending us e-mails.I noticed thatCISCO has produced a newer version of the RVO42 V3.0 and has firmware version 4.x. can you upgrade the Linksys RV042 Hardware V 1.2 to the 4.x firmware? I have found a few articles and forums online about otherpeople having the same issue with the RV042 v1 randomly blocking, e-mail but no one ever has a solution to correct the issue.Some people have recommend to roll back to factory default and reconfigure the router as the config may by corrupt.

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Cisco Routers :: RV042 Opens Ports 80 And 443 When HTTPS Enabled In Firewall?

Nov 15, 2011

I recently installed an RV042 v1.1 vpn router (older hardware revision but using the latest available firmware 1.3.12.19-tm) and set up VPN access with the QuickVPN client.  QuickVPN requires that the HTTPS setting be enabled under the Firewall options, so I did.  I then scanned our static IP with grc.com's ShieldsUP! to check for open or non-stealthed ports and discovered that ports 80 and 443 show as wide open, while port 113 is closed but not stealthed.  If I disable the HTTPS setting under Firewall, then ports 80 and 443 become stealthed.  Is there any way to use QuickVPN and keep these ports stealthed?

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Cisco Routers :: RV042 Port Forwarding Stops Working When Firewall Is Enabled

Jun 4, 2013

I have a RV042 router on a single WAN and an internal LAN. I have configured port forwarding as follows: HTTP[TCP/80~80]->10.0.0.6HTTPS[TCP/443~443]->10.0.0.6IMAP[TCP/143~143]->10.0.0.5IMAP SSL[TCP/993~993]->10.0.0.5SMTP SSL[TCP/587~587]->10.0.0.5
 
Everything works just fine when I have the firewall DISABLED. However, when I enable it the behaviour is erratic. 1 out of 10 attempts to connect to ANY port forwarded works. Almost all attempts time out. Notice that this happens even if using only the default firewall rules (which should be bypassed by the port forwarding as I read in other posts).
 
My second try was to create firewall rules manually, overriding the default ones. I tried adding rules from source WAN1 (where my connection is) to ANY and to SINGLE IP's on every port. Nothing seems to work.
 
I don't know what I'm doing wrong, this is really bugging me. I had to turn the firewall off so we can access our servers from outside the office. This shouldn't have to be done.
 
Just found out that my firewall is getting LOTS and LOTS of Blocked - SYN Flood entries. I think this is why we are having trouble with the firewall. Could this be the problem? I have no idea where all these SYN packets are coming from since they appear with spoofed IPs or come from different bots all over.

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Cisco Routers :: Does RV042 Router / Firewall Support Port Forwarding From Internet

Aug 5, 2011

I am using an RV042 router/firewall -- firmware v1.3.13.02-tm -- connected to a cable modem.I have one public address (WAN1) assigned by my ISP's DHCP server.All my machines on the LAN have static IPs.  (RV042 DHCP Server is disabled.)I have set up port (80) forwarding to 192.168.1.101 The HTTP port forwarding does work if an http client on the LAN sends a request to http://<public-ip>:80But I cannot get a response if I send a request to  http://<public-ip>:80 from a machine on the WAN.
 
I  did configure Access Rules to allow http traffic (and then tried to  allow *all* traffic) between a single IP on the WAN and 192.168.1.101 The  incoming log table shows a connection is made from the http client on the internet to the correct http server on the LAN, but there is no resonse  from the LAN to the remote client.Is my configuration the problem, or is this feature not supported by the RV042 router? Could my cable modem be blocking outbound traffic?

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Cisco Firewall :: Unable To Edit IP Based ACL Firewall Rule In RVS4000?

Apr 8, 2012

I am a novice with networks but do have a fair understanding of networks. I have a small business network, utilizing a RVS4000 router (Firmware V2.0.27)I am attempting to set up firewall rules to block certain web sites at certain times.I have successfully set up rules using source and destination ranges, to deny service 24 hours a day everyday.
 
However and here is the problem when I attempt to edit any of the rules (I want to change the time to certain hours of the day) it allows me to edit the rule but when I attempt to save I get an error message up saying there are invalid characters and it will not save the changes?create the whole thing with the changes I want it works fine, is this a known bug?

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Cisco Firewall :: ASA5505 Firewall Rule Not Blocking

Apr 1, 2013

I'm trying to troubleshoot an ASA5505.
 
The original goal was to block "Mumble/Murmur" (a voip app) traffic, which runs on TCP/UDP 64738, both inbound and outbound, except to a certain host (63.223.117.170).
 
However, when nothing I tried seemed to make a difference, just to troubleshoot, I decided to try blocking all inbound traffic.  I first disconnected ethernet port 0/0 to ensure that it was cabled correctly and the outside interface went down when I did.  That worked as expected, so I confirmed I had the right interface and it was cabled correctly.
 
I then applied a "any any deny ip" rule as the first element in the outside interface access_list, as you can see below.  However, it appears to have had no real effect and the hit count is very low (it should be astronomical).
  
show ver 
Cisco Adaptive Security Appliance Software Version 9.0(2)
Device Manager Version 7.1(2) 
Compiled on Thu 21-Feb-13 13:10 by builders
System image file is "disk0:/asa902-k8.bin"

[Code].....

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D-Link DIR-825 :: Portforwarding Leads To Ports But Not Opening?

Jan 25, 2013

I've had this router for a few months after my last one died and I'm now completely unable to port forward. I follow all the steps to port forward but alas the port is still closed every single time. I've tried a few fixes in the past including disabling UPnP, using those auto port forwarding programs, and creating an exception for the port in my fire wall. Nothing has worked!

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Cisco Routers :: Rv082 Dmz Rule Limitations

Apr 27, 2013

we have a RV082 and have the DMZ option enable for a range of IPs within the same subnet of WAN IP and this works great. I have another range of Public IPs from our ISP that is not in the same subnet of the WAN IP and do not see a way on the RV082 to include this 2nd bank of Public IPs in the DMZ. Our ISP internet feed plugs into the RV082 WAN port and we have a switch pulgged into the DMZ port of the RV082 that is used to connect the public devices in the current DMZ. Both banks of Public IPs from our ISP come over via the ISP internet feed plugged into the WAN Port. My question is, if I cannot configure a DMZ rule to allow this 2nd range of Public IPs to "travel" to the RV082 DMZ port.

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Cisco Routers :: RVS4000 WOL Rule Not Working From WAN (Internet)?

Oct 17, 2012

I picked up an RVS4000 V2 and configured a rule to forward a Magic Packet to an internal system to wake it from a sleep state. Everything was working fine until I update the firmware to v2.0.3.2. I know it's not the the computer as I can wake it from Sleep internally without any problems. One thing I noticed is that the static IP for the computer in Sleep state gets lost in the ARP/RARP Table though the NIC is configured to respond to ARP requests in Sleep.
 
Has anything changed in v2.0.3.2 that requires a different configuration to get Wake on Lan working externally?

My Setup is
 
Computer
P8Z68 Deluxe/Gen3 onboard Intel 82579V NIC
Wake on Magic Packet: ON
Respond to ARP/NS requests without waking system: ON
 RVS4000 V2 (v2.0.3.2)
Mode: Gateway

[code]....

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Cisco Routers :: WRVS4400N - ACL Rule(s) Causing Sever Slowdown?

Feb 24, 2012

I have a DSL line at work that we use to test external services provided to external users on our primary Internet circuit (Citrix, web applications, etc).  Because this DSL line is for testing only, we want to lock it down so the only destinations allowed through the firewall are our own IP spaces. 
 
I purchased a WRVS4400N for this purpose, thinking I could use the IP based ACL list to create these restrictions.  However, every time I try to create an ACL, the internet slows to a crawl, and many sites don't come up at all.  This occurs even if the ACL rule I add is a simple "allow any any" rule similar to the default rules.
 
Is this a known issue, or am I configuring something incorrectly?  Here's an example of a rule I'm using (IP not real):
 
Action     Service          Source Interface     Source     Destination                                   Time              Day
Allow      All Protocol     LAN                    ANY           1.2.3.0/255.255.255.240*             Any Time       Every Day  
 
I also get the problem with a simple allow from a single IP (mine) to any destination, without any other rules enabled.
 
implementation of the ACL ruleset on these routers?

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Cisco Routers :: RV220W Access Rule Reorder Broken?

Jul 24, 2012

I need to add some rules to block some attacks. I can add them fine but they get added to the end of the list. I try to re-order the rules to put them at the top and can not. I am using Internet Exploder 8 and I put a checkmark on the rule I want to move then click the reorder button. It takes me to a screen that shows 0 rules. I click the Back button and am back at the list of rules on that page. I am running the latest firmware which is from a year ago.

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Cisco Routers :: RVS4000 - Format To Input Into ACL Rule Range

Feb 18, 2012

I have read through the manual. My question is what is the proper format to input into the ACL rule "Range"?  Would as an example work- 192.168.0.1 - 192.169.255.254? Will the range effectively work? Or does it have to be 192.168.0.0 - 192.169.255.255?

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D-Link DIR-615 :: The Rule Is Being Used By Another Rule And Cannot Be Deleted

Jul 27, 2011

I accidentally setup two schedule rules both with the name of "Log". When I highlight either rule, and try to delete either, I get error "The rule is being used by another rule and cannot be deleted"  How do I delete?

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Cisco Firewall :: ASA 5510 / 4GE SSM - FP L2 Rule Drop

Nov 10, 2011

ASA 5510 running without issues for a while but we needed extra port so added a 4GE SSM.
 
Having installed the 4GE SSM we had some issues with the card not liking a connection to our switches and only working by plugging directly from the server into the firewall, not great as we wanted extra servers on the line in the future.  So we upgraded the firmware and no are at an impasse.
 
We have upgraded to 8.0(4)3 and now we cannot get any traffic through the port, we can't even connect to an external DNS server.  Running a packet trace I get an immediate error on the first step '(l2_acl) FP L2 rule drop', and it appears as though the outside connection is down.
 
I have some experience on setting up basic port forwarding and NAT for internet access, webservers, mail but this has thrown me. 

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Cisco Firewall :: ASA 5505 - Creating NAT Rule

Mar 7, 2012

Our external security department needs to scan, every three months, a computer behind the firewall. I need to create a simple NAT rule that will allow an ip address or subnet to the computers behind the ASA 5505. At the moment, we have a simple NAT rule which allow all network traffic to exit from inside to outside.

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Cisco Firewall :: ASA 5505 - Adding New Rule For Network?

Mar 30, 2011

I have an asa 5505 and I would like to adding a new rule for a network, however it was added, it seems it would be inactive. I have two inside network,192.168.12.0/24 (name: lanA) and 192.168.99.0/24. (name: lanB) I have the following in the running-config:
 
access-list lanB_acl line 1 extended permit ip 192.168.99.0 255.255.255.0 any
access-group lanB_acl in interface lanB_interface
  
But when I tried to reach a host in the lanA, the packets are dropped. I configure the asdm, which shows this on the LanB interface:

1 lanB_network | any | ip | permit (hits 344)
2 any | any | ip | deny
 
 and I checked the packet tracer with: tcp, source: 192.168.99.57:10460 dest: 192.168.12.2:443 and it shows that the packet has been dropped by the last 2. 'implicit any any ip deny' rule, in spite of my access-list rule (access-list lanB_acl line 1 extended permit ip 192.168.99.0 255.255.255.0 any) preceded it, and active.
 
The lanB and lanA interfaces are the same security level 100, and I can reach the outside/internet from 192.168.99.57 Is it possible that I have to reload the rules or something like in order to apply? Or I missconfigured something?

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