Cisco WAN :: Does The RV016 Port Forwarding Bypass Firewall Default Rules
Jun 20, 2011
when opening SSH service to a Database Administrator within my LAN, that has a RV016 as the default gateway. So confidence, I just set up a port forwarding in Setup > Forwarding and everything works fine, cool.
However, I do not want this to be a public access, I need a specific firewall rule for a specific external IP address (only the DBA fixed IP Internet might connect to my database server through SSH).
O noticed that when a port forwarding is created within RV016, it bypass the firewall default rules and wide-opens the service (port) to the web. Conceptually, this is correct, as port forwarding is a network translation, but I expected that my firewall had work over this.
My current solution was to create a "Deny from all" rule at port 22 and then create one additional rule that allows traffic from an specific IP at port 22.
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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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Jan 15, 2013
Here is my environment: DSL Modem - ASA 5505 - switch ,Inside network (192.168.2.0/24)
What I have successfully done:
- Modem online and passing on DHCP requests from the ASA to my ISP (ASA does get an internet address on the outside interface)
- ASA assigning DHCP to internal network
- All internal clients can access the internet.
What I am getting stuck on is getting NAT rules set up for simple port forwarding. What I would like: ANY internet address be able to access a server on the inside network address (192.168.2.x) over tcp/22 . I set up what I believe to be the correct NAT rule and Access Rule, but the packet tracer fails. Here is my config.
ASA Version 9.1(1)
hostname xxxxxx
domain-name ugh
enable password xxxxx encrypted
xlate per-session deny tcp any4 any4
xlate per-session deny tcp any4 any6
[code]......
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Oct 31, 2011
I have a system with a RV042 managing the internet connection.Behind the RV042 I have an e-mail server and a development machine that I access through SSH.My problem is that if I forward port 25 to my internal e-mail server it bypasses the firewall rules.I have an external vires and spam scan host that is the only one I should accept incoming email from - but it seems that whenever you add a portforward then it bypasses the firewall rules.
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Dec 2, 2011
So here is my network.
ASA5505--->Cisco1841--->Cat2960
Code
ASA asa831-k8.bin
Cisco 1841 c1841-adventerprisek9-mz.151-4.M2.bin
Cat 2960 c2960-lanbasek9-mz.122-55.SE1.bin
and here is my dilemma.
I can SSH from the internet to my ASA on default port 22, directly to my public IP. I can SSH from the internet to my Cisco 1841 on port 2001. I can not however, SSH to my Cat 2960. From what i can tell, on the Cat2960 i can't change the default port 22 for SSH to different port, just like i did on the Cisco 1841. I looked to see if I can change the default port for SSH on he ASA, it does not look like this is an option.
The bottom line is that i want to be able to SSH to all three devices from the internet. I only have one public IP. As of now, what i can do is only SSH to the ASA on default port 22 directly to the public IP and Cisco 1841 on port 2001. It appears that changing the default SSH port on Cat 2960 is not an option. It also appears that I can't change the default SSH port on the ASA, if i could, i would and then i should be able to SSH to the Cat 2960 on port 22. No matter what i did on the ASA, it always listens on port 22 for SSH connections.
show asp table socket
TCP 001f549f <<pub IP>>:22 0.0.0.0:* LISTEN
how do i make it listen on different port?
Here is relevent config for SSH for cisco 1841 (port forwarding)
ON ASA
object network ROUTER
host 10.10.1.1
[Code].....
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Nov 3, 2011
I am having some troubles finding information about how to configure firewall policies (rules, chains, etc.) via telnet on a RV016. The reason for that is that i keep getting some log entries "connection refused - policy violation" and "blocked" even with my firewall wide open (only allow rules on all interfaces, SPI and block wan request disabled, multicast and https enabled, etc.... ). Also, with these exact same rules, i can only connect via PPTP with the firewall disabled. The minute i tick the enable option the tunnel never gets to authentication phase. I then started reading OpenRG manual and many things are quite similar, but some other entries are missing from that manual (maybe some changes made by cisco?). I am trying to figure out some service ids, chains (e.g. the rv016 has some rules redirecting to chains 10, 100, 200 but i can not find them anywhere), and so on. I have only one rv016 and about 60 connections to it so i can not experiment that much without having the whole company on my neck with internet problems.
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Mar 22, 2012
I have found numerous posts discussing this but have yet to find a solution. I have an RV082 with firmware 2.0.0. 2.0.0.19-tm and I need a way to limit the incoming smtp traffic to just the spam filtering company.I have a port forwarding rule to forward WAN1 port 25 traffic to 192.168.1.10.I tried to add an access rule to deny all port 25 and then added one to allow WAN1 port 25 source <spam company> destination 192.168.1.10The RV082 log screen shows the traffic allowed but it does not work. If I uncheck the 'enable' box on the DENY port 25 rule email is still blocked. Only when I uncheck the 'enable' box on the ALLOW rule does email start flowing again.
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May 16, 2012
I'd like to setup a WCCP in those routers, but as I read, it's not possible.
Another way to circumvent this limitation is to foward a request to the router from the LAN port 80 to a LAN IP, something like:
LAN 1 192.168.1.100:80 -> router -> LAN 2 192.168.1.101:80
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Jan 7, 2013
We have a problem with some websites being blocked every now and then. Everyone inside can access this external website for weeks, and then suddenly it's not available for a few hours, and then it comes back. All without me making any changes to the firewall, ASA5510. The external website that has nothing to do with us can be accessed from anywhere outside our network, example on my iphone through Verizon.
We have not set up any rules about blocking websites, all I found was the Default Service Policy. After backing up and then deleting the rule we are able to access all sites.
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Jan 24, 2013
I have a WRT54G Linksys router and I am wondering what is the default username and password for port forwarding?
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Dec 1, 2012
Setup firewall rules that will block all inbound Internet access to the web server except port 443, Setup firewall rules that will block all communication between the two internal networks, except ports 7000 and 1702
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Apr 7, 2013
I am trying to open up port 32400 on my 881w Cisco router but I have not had any success I need to configure manual port-forward to enable my Plex Media server.
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Mar 31, 2011
I have two LANs 192.168.0.* and 192.168.1.* (main)
I'd like to facilitate port forwarding on the sub-LAN - is there a way to configure the device to do so? The "main" LANs fowarding works just fine, however I have specific ports that need to go to the sub-LAN.
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Aug 9, 2012
I have a cisco 5520 with 8.4.4(1) and I already have a NAT for an email server on it.Here is the IP and ports on current configuration:
Email Server Private IP: 1.1.1.1
Email Server Public IP: 2.2.2.2
Email Server Local Ports : 25, 587
Right now I have ports 25 and 587 opened for 2.2.2.2 so, now I need to add a port redirection for another port:
New Port : 8925
I need to redirect 2.2.2.2:8925 to 1.1.1.1:587
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Apr 11, 2013
i'm having a problem portforwarding/redirection for the pix 501?I'm trying to open the ports 49003 and 40085 in order to view our dvr remotely and i'm not exactly sure how to it.
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Nov 5, 2012
I have an issue with portforwarding in my teleeye cctv behind asa 8.4. I can browse the DVR outside via http however when i attempt to login, "server busy" will prompt afterwards. Note: Theres no issue when acesssing the DVR locally.
Heres my config.
OUTSIDE INTERFACE:
interface Ethernet0/3
speed 100
duplex full
[Code]...
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May 2, 2011
i have a asa with a outside IP address of 140.32.121.5. behind this firewall i have a cisco MWR 2941 that i would like to connect to via telnet. its inside ip address is 10.10.10.2. my reasoning for this is because i cannot SSH or telnet from a ASA so i need to have the ASA push my telnet request to the router on its inside interface.i have tried some NAT examples but i am very green with NAT. i have also built access lists that look like the follow " access-list 101 permit tcp any 10.10.50.2 eq 23. and then tied the access-group 101 with the outside interface. this also with no success.
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Oct 30, 2012
I need to open port range 554 - 558 to a DVR on the internal network. Also, I need to NAT one of my public IP's to the DVR. How is this accomplished in 8.4? I was able to do it in an older version ASA software.
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Sep 4, 2012
I've tried setting up some simple port forwarding on my ASA, where I want to forward one port on the external interface for both UDP and TCP to the same port on an internal server.
It works fine for UDP, but all TCP packets are dropped on the outside interface, even though the configuration for UDP and TCP is basically the same! This is my config:
object network MY_SERVER
host 10.10.1.4
object service TCP_MY_SERVICE
[Code].....
Port count goes up on line 2 (UDP) but never for line 1. I just see the packet denied instead. Same thing happens in the packet tracer, a packet destined for my external interface on that port for UDP is allowed and NAT'd just fine. TCP it gets dropped by the ACL on the outside interface.
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Oct 23, 2012
I have a Cisco ASA 5510 appliance running ASDM 6.3 We have a number of public IP addresses associated with our company. In order to utilise the IP addresses effectively I want to use one puplic IP address for two servers running on different ports.e.g.
Public IP address 78.109.174.100
for both
Server 1 HTTPS and HTTP
Server 2 FTP
Both Servers live in the same subnet (DMZ) I believe this maybe port forwarding but could be completely wrong. I've tried creating a NAT rule that goes from Server 2 Network object to Server 1 external but this didn't work.
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Feb 25, 2013
have a couple of ASA 5505's which work fine for what they are doing VPN and all that - we have 1 DLINK DFR-700 Firewall left and I need to get a new ASA to replace this since it is old.All this box really does is port forward external clients to 1 address on the internal lan for client software updates.So lets say we have client a with IP 1.1.1.1 and client b has 2.2.2.2 - at the moment this is what happens client a and b come in through http and get mapped to the internal http server 10.10.1.2So I need to setup about 100 clients which can come in through http only - get mapped to the internal IP and also keeping the internal server to be able to access anything outside.
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Dec 6, 2012
I have ASA5505 and am having issue with port forwarding NAT . [code]
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Jun 6, 2013
I'm trying to forward an internal service on a internal server to the external interface on the same port on the outside interface of our ASA.I been searching for a solution for days and found nothing.Here are the relevant parts of my config:
: Saved
:
ASA Version 8.4(2)
!
object service TCP-WebServer-8080
service tcp source eq 8080
object network WebServer_Object_10.1.10.7
host 10.1.10.7
[code]....
So it looks like it's being dropped by an ACL, but it looks right to me.
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Dec 3, 2012
I have a ASA 5510. I want to access the internal server IP through the ASA via http://60.54.x.x:8080/sms/DnNotify ( via port 8080).How do i configure it? NAT? ACL? configure port?
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Sep 1, 2012
I have the following configuration in my ASA 5505 and I'm having problems connecting with other players on my XBox (moderate NAT).
I think my problem is that I need to forward ports tcp:3074, udp:3074, and udp:88 to my xbox which is at 192.168.2.50 (vlan 3 below).
[code]
# sh run
: Saved
:
[Code].....
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Oct 1, 2012
I am trying to forward specific ports from the outside interface on my ASA5505 to my servers inside and can not get it to work! I have a VPN that currently works and the firewall rule in place I am just overlooking something simple I'm sure. Here is the config:
ASA Version 8.2(5)
!
hostname ASA
enable password <removed>
passwd <removed>
[Code]...
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Oct 3, 2012
I am trying to forward all the traffic of a particular port number to my outside interface forwarded to an internal IP address.
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Apr 2, 2012
I'm having issues both with port forwarding and VPN with my PIX. I've tried different ways to set up port forwarding for remote desktop, but I still haven't had any luck.
With the VPN, I can secure a connection into the PIX, but I cannot access the internet or ping any of my devices on the remote network.
hostname PIX-515E-1
domain-name #####
enable password ##### encrypted
passwd ##### encrypted
names(code)
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Oct 12, 2011
Loss connection every day for several hours and just comes back. Reset router than works fine. Only about six months old. Found several forums staing the same problem. I have a RV016 16 port VPN router. What can I do?
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Jun 22, 2011
I am using a RV016 (192.168.1.2) as a router and DHCP. It automatically assigns its own IP which is 192.168.1.2. I can not set my RV016 to assign a Default Gateway IP of the server. The workstations will connect to internet via this server (192.168.1.1)
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Mar 15, 2012
We are trying to setup our ASA 5505 to do port forwarding to multiple internal servers and have run into some issues. A little background on what we are trying to do.
We have 1 static external IP. Internally we have one exsisting server (10.1.1.184) that has port 80 forwarded to it and another exsisting server (10.1.1.185) that has port 443 forwarded to it. Both of these servers are serving seperate web apps to our employees who of course use them offsite. We have now added an additional server (10.1.1.186) that needs to use both ports 80 and 443. Is there any way to set it up so that these ports can be forwarded to all the servers that need them? Also, how would this work as far knowing what traffic will need to go to which server even though it is using the same port?
The equipment is: ASA 5505ASA Version 7.2(4)ASDM Version 5.2(4) I appologize in advance if what I'm trying to do is difficult/impossible. I inherted the ASA 5505 at this location and I was not here when it was initially installed. In fact no one on staff was here when it was initially installed. I did manage to find the passwords to it though. I'm not at all familiar with the ASA 5505 or Cisco secuirty appliances in general.
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Aug 21, 2011
how do i enable port forwarding on the CLI for ASA 5510. outside subnet is 192.168.1.0/27. when i try to ping another IP with that range i can't access.
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May 4, 2011
All I want to do is have VNC connect on port 5950. So I want to forward traffic coming in on the external ip address on port 5950 an internal ip address on port 5950. Here is my config:Building configuration...Current configuration.
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