Cisco Firewall :: 2801 / Setting Up Static NAT To Internal Server?
Dec 15, 2012
One of my internal servers requires it to be available to the internet I am having a hard time allowing it to be NATed through my Ciscc 2801 router. It seems as though im missing something small. From what I can gather it seems as though its as issue with ACL, but im not sure. I have ran the following command: ip nat inside source static tcp 192.168.5.1 ***WAN IP Address*** 8443 extendable Then I tried to add it to the ACL via this command: access-list 150 permit tcp any host ***WAN IP Address*** eq 8443
Here is a copy of my config.
IP 172.19.3.x
sub 255.255.255.128
GW 172.19.3.129
Ciscso 2801 Router
[code]....
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Mar 23, 2013
I have nated my 172.81.15.0 255.255.255.0 into my internal server 10.1.10.164 , i can ping the out side server but the internal server is not accessible from out side static (Database-Servers,interface-sms) 172.81.15.2 10.1.10.164 netmask 255.255.255.255icmp permit 172.81.15.0 255.255.255.0 interface-smsroute zemen-sms 172.81.15.0 255.255.255.0 10.131.199.201 1access-list Database-Servers-in extended permit tcp host 10.1.10.164 host 10.185.62.144 eq 9090access-list Database-Servers-in extended permit tcp host 10.1.10.164 host 10.185.62.144 eq wwwicmp permit host 10.185.62.144 interface-smsi can ping the out side server 10.185.62.144 with out a problem . from the server 10.185.62.144 i can ping untill 172.81.15.2 and it will not ping the natted server 10.1.10.164. as u seen the accesslist ping is permitted.
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Nov 22, 2011
I running site-to-site IPsec VPN in Cisco 2811 IOS 12.4 both site. Here I encounter a problem to access server on Site A from Site B
Site A having Leased Line connected to router with Public IP. I have done static mapping 1 web server to Public IP (NAT). This to allow external users to access the server via Public IP. At the same time, users at Site B would need to access to same server via Internal IP since they have Site-to-Site VPN established. But once I done Static Mapping (NAT), user at Site B unable to access the server at Site A using its internal IP. But external user can access server via Public IP. What went wrong here. Do i need to add extra command to get this done?
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Mar 20, 2012
Currently i am having a scenario where i have setup RV042 and which is connected to Microsoft Forefront 2010. PPTP works fine only on rv042 subnet but i am not able to access the "internal" network of TMG.RV042 (172.16.1.1) ---> TMG [external] (172.16.1.2) ---> TMG [internal] (192.168.1.1) Is there any way through static route to access the TMG internal network through RV042 pptp server?
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Mar 18, 2012
I have an ASA5510 running 8.2 code and I have over 200 static nats from the outside to the inside interface and that is how I expose our systems to the Internet. If this inside interface fails we also have a bypass interface that also terminates on the internal network but I am not sure how the nats will behave given they are statically mapped to the inside.
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Jul 2, 2012
The router I am using is the Linksys X2000 wireless-N ROuter with ADSL2+ Modem. How to give my linux server a static Ip adress. I've googled it and I don't understand how they are telling me to set it up in the router.
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Jan 12, 2011
I have a client in a workgroup environment. They are a small company with perhaps twenty systems. Their infrastructure consists of a Dell Switch, a Cisco ASA-5505 which hands out the DHCP and a router. And that's that.They have been using an external IP as their DNS Server to get out to the Web. However, they now want to add an internal Linux-based DNS server.In looking through the ASA-5505 today I noticed a field for DNS enteries. Is this where the IP for this new internal DNS Server (in the secondary DNS field) would go?If so, would it be necessary to reboot the ASA-5505 for this change to take effect?
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Dec 6, 2010
I have a nat and vpn setup on my Cisco 2801 router.Everything is working as expected except the NAT. I have a single static nat translation but it only works for inbound and not outbound. Going outbound, it uses the default overload nat address of the outside interface. [code] I want to add another mailserver. But I fear if one mailserver were to get black-listed, they would both be reporting there ip address as the same address (the one on the ethernet interface) which would blacklist both mail servers.Again, inbound nat works ok, but outbound is just using the IP of the ethernet0/0 address.
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Aug 2, 2011
I tried the solution posted at [URL] however it did not work on my ASA5505 8.4(2). I thought that it may be because I only have a single public address so the web server is responding to port forwarding through the one public IP already. looking in ASDM it appears to indicate that a configured access list is blocking the server from responding to the internal hosts.
object network Private_IP
host 192.168.1.15
object network Public_IP
host 1.1.1.1
object-group network internal_net
[code]....
Can I fix an access list (or something) to make this work or am I wishing for too much with only one public IP? This worked by default on my Netgear firewall.
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Aug 23, 2011
I am using ASA 5520 with 8.2.4 IOS. I'm new to ASA/Firewall. I need to do access webserver from outside network.From Laptop (192.168.2.51), If I connect to url... it should open page from 10.10.10.50.I also need to ssh to webserver from laptop. If I ssh to 192.168.2.50 from laptop, it should connect to 10. 10. 10.50. [code]I can't get to webserver from outside network, so now, I connected laptop to directly ASA 5520 outside port with crossover cable.ASA Inside port connects to L3 switch. Webserver also connects to L3 switch. But still doesn't work.
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Sep 25, 2012
I was just wondering if it's possible with an ASA 5510 to connect to the external IP address of an internal server from inside the network. I have already set up dns doctoring for dns lookups, and everything is working fine there. We have an application inside the network that tries to connect straight to the external Ip of another internal server. where to look in the ASDM 6.4?
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Oct 27, 2011
I have a server that I need to open up some ports on to allow access to the new internal Sharepoint server we're setting up. I've been having some issues getting the ports open like once I put the commands in and save them that server suddenly stops allowing outbound traffic. After looking at a few things I noticed while I was looking at the config file that the ASDM location is showing 2 IP's, both are the same as the server I'm trying to open ports for one being the private IP and the other is the public IP I'm trying to use. Is this the reason I'm having problems when I try to open those ports to my server? Do I need to use both a different private and public IP for this server so I can get my ports to work? The programmers selected these IP's so if I need to change them I'll let them know in case they need to make changes for the Sharepoint setup. This is on an ASA 5505.
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May 22, 2013
I have ASA 5520 installed. I want to use ntp server for firewall clock setting. I found one open-access ntp server (stratum 2) in Los Angeles:
[URL] 209.151.225.100
Can I use the following command to set ntp server?
ntp server 209.151.225.100 source outside.
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Jul 26, 2011
I've been having a problem with setting up static dns 3 on my WAG, what has been set is...
Static DNS 1: 208.67.222.222
Static DNS 2: 208.67.220.220
Static DNS 3: 208.67.220.222
Now if I look in my router status screen 1&2 are correctly displayed but the 3rd entry is showing my ISP's DNS,
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Dec 23, 2011
Currently I have an ASA setup as a Firewall with 1 outside interface and 2 inside interfaces. Initially, the Guest interface was setup to receive DHCP from the ASA and everything was working. I'm adding router and a server for the guest interface and what I'm trying to accomplish now is the following: ASA 5505 > Airport Extreme with a public static IP (69.xx.xx.6), handling DHCP and NAT > Mac Server as DNS Server.Right now, when I connect to my Airport Extreme with any computer, I don't have internet. I don't understand what's wrong. My DNS Server has a reserved IP address: 192.168.226.2 and it's pointing to itself and forwarding the ISP DNS servers, the Airport Extreme is handling the DNS Server IP and the ISP DNS Server IP but I can't connect to the internet from the server. [code]
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Aug 21, 2011
It's been a while since I've done a lot with a PIX config so what is the best way to allow access for 2 IP addresses that need to RDP into a server here inside our network. They also wanted to have ports redirected, 3391 to 3389 and 3397 to 3389.
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May 31, 2011
I'm having trouble setting up a Cisco 2801 as an internet router between our firewall & our ISP.I've setup FastEthernet0/0 as the WAN port & FastEthernet0/1 as the LAN port. I've setup a default gateway pointing the next hop (the ISP),when I plug in a pair of laptops configured to mimic our IP scheme, I'm able to ping thru, but when I put the router between our firewall & ISP I'm not able to get out to the internet (can't ping google) I can still ping the next hop.,Our old router died, so I am unable to pull up its configuration. Here is the code I'm come up with so far.
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May 21, 2012
I am using a 6500 with FWSM. I need to separate an internal server/HQ network from 3 or 4 different external connections. The external networks do not necessarily need to be isolated from each other.I have the option of using a 3 layer model: L2 Access layer to SVIs on the Distribution layer and then L3 to the 6500.L2 Access, connecting directly to the 6500s, with the SVIs on the FWSM.Is it better to have the FWSM outside the MSFC or Inside? Am i correct in thinking that "inside" vs "outside" is determined by whether the SVI's are configured on the FWSM or the MSFC? is there any performance impact from having the FWSM doing the routing instead of the MSFC.If the vlans are all configured on the FWSM, what is the 6500 doing, other than providing switch ports?
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Apr 23, 2012
I have an ASA 5505 with the base license,When I setup the DMZ interface I had to add the deny access to the inside VLAN. The DMZ works fine with WiFi on it, but user's iPhones can't get email unless they turn WiFi off.Is there a simple way to allow HTTPS traffic through the DMZ interface to our internal Exchange server which is NAT'd on the 5505's external IP?
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Sep 13, 2011
I got the charge of a ASA 5510 running with 8.3(1) version.Found that this is simple config with Patting for inside host and couple of Static Nat for web servers and FTP server as well.
There is lots of other configuration being done,I assume for the purpose of just R&D by the previous administrator.I need to understand if the following Nat statements holding any relevance?
Where we are running Only NETWORK_OBJ_192.168.0.0/23 subnet at inside and there is no other subnet defined in rest of the statements.i.e 10.0.0.0/27 and 192.168.1.128/27 doesn't exist at all.
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Jun 15, 2013
I want to public to the internet a web + ftp server, all running in the same machine that now is a performance pc, in the future will be a qnap nas ts-220. I don't need extreme performance so my ISP gives me only 12 Mb down and 0,8 Mb up. I will use the nas as download station, ftp server and a web server when I'll public a personal site.
this is the config:
-modem/router adsl2+ that connects to the internet. ISP gives me dynamic ip! it has 192.168.0.1 ip and I think it cannot be changed.
-a firewall hardware zyxel usg 100 with all active UTM services. it has default ip 192.168.1.1. the netgear in the "attached devices" see the zyxel as 192.168.0.2, the same ip zyxel says to the wan1 port.
-a pc or, in the future, a nas that now has automatically assigned ip 192.168.1.34.
I must use a free or paied service as dyndns or something else. If the solution to retrieve everytime the dynamic ip is to set the ddns only in the router/modem netgear then it can only use dyndns.org or .com or .it with the dns of the associated ddns service. For example: if I set a dyndns.it account in the netgear I must set also the dns provided by dyndns.it because if I set google dns or something else the service cannot work.At the moment I tested only with a filezilla server running on the pc directly connected to the netgear, no zyxel in this test.
The config is:
netgear with ddns service provided by dyndns.it, activated with the username and password, in the wan I setup the dmz as 192.168.0.2, in the adsl settings setup the dyndns.it IPs. in the services of the netgear also provided a custom service with ports from 60000 to 60050 and created two rules one for outbound and one for inbound where I let data pass from the wan to the server in the lan 192.168.0.2.
filezilla running on the pc with windows 7 x64 with lan ip 192.168.0.2 mask 255.255.255.0 as th3 netgear and gateway of course the netgear 192.168.0.1. dns servers same as provided by dyndns.it. filezilla configured with only one anonym user without password for testing, default listening port is 60000, passive mode active with range 60000-60050 and for retrieving IP I set default, no Dyndns.it host cause it will not work.
So configured it works fine!problem is when I connect the zyxel between the netgear and the server.how change the default ip of zyxel? in configuration - ethernet - lan port is correct to set there the default and static ip to 192.168.0.3? there are many options! same as dmz you can set there the static ip and what ip?also when you want to public a server zyxel don't say nothing about port-forwarding. it says only create two address objects one with ip of the netgear and one with the ip of the dmz port then create a rule in the firewall section where you set wan to dmz and destination and origin ip selecting the two address objects previously created then you are ok...no, really no! and the ip of the firewall rules in the netgear? which ip do you must set? 192.168.0.2? or 192.168.0.5 if you set it up in the dmz port of the zyxel? no, it is a conflict so you must set another ip.to set correctly the server to be visible in the internet with the netgear + zyxel usg 100?
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Mar 14, 2011
I have configured a L2L VPN on a Cisco 1841 ISR. I am statically NATing some of my internal hosts to IP addresses that are included in the encrypted traffic. Please note that not all of the internal hosts are being NATed. I am doing this to hid some of the real IP addresses on the inside network. I have confirmed that the VPN works, as well as the NATing of the VPN traffic. I have traditionally configured L2L VPNs on Cisco ASA 5500 series appliances, and this is my first attempt with the 1841 ISR. I just want other to take a look a see if I missed anything, or, could I have done some of the configuration more efficiently. All comments are welcome.
VPN-RTR-01#show runBuilding configuration...
Current configuration : 9316 bytes!version 12.4service timestamps debug datetime msecservice timestamps log datetime msecservice password-encryption!hostname VPN-RTR-01!boot-start-markerboot-end-marker!! card type command needed for slot/vwic-slot 0/0logging buffered 51200 warningsno logging consoleenable secret 5 xxxxxxxxxxxxxxxenable password 7 xxxxxxxxxxxxxxx!no aaa new-modelip cef!!!!no ip domain lookupip auth-proxy max-nodata-conns 3ip admission max-nodata-conns 3!!crypto pki trustpoint TP-self-signed-2010810276 enrollment selfsigned subject-name cn=IOS-Self-Signed-Certificate-2010810276 revocation-check none rsakeypair TP-self-signed-
[code]....
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May 3, 2012
I have a Router 2801 What conf should i make to access the webserver from the same LAN.
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.1.1 192.168.1.63
[Code].......
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Mar 20, 2011
ASA 5510I'm trying to add a static NAT for to allow access to an internal webserver on my DMZ. I've added the config, however i'm still unable to get to it from the outside. I'm able to ping and browse the server from the LAN and I'm also able to ping the external interafce from the outside, but just unable to browse.I've turned on logging and the error I'm getting is "Inbound TCP connection denied...flags SYN on interface outside"
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Feb 9, 2012
I have just purchased an ASA 5505 for my remote users to access our internal network. I have followed all the setup instructions I can find. I am able to establish a VPN connection using the Anyconnect client and can see some of my internal network. (Basically, only the subnet of the internal interface) However, I have several subnets inside my LAN which are routed by another switch inside my LAN. I have built in the correct static routes so that the ASA will send traffic to that intenal routing switch for any subnets not part of it's inside interface subnet. I can see and ping those subnets from the ASA itself but the AnyConnect clients cannot.
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May 21, 2011
I wanted to move to the cisco arena, and having a bugger of a time figuring out simple nat/pat rules combined with access lists. I've been reading Richard Deal's Cisco ASA configuration book, googling the heck out of this simple problem and can't see what I'm missing.
I have an ASA 5505 unlimited security plus license running 8.2(3) and a simple network, 192.168.0.x internal, 192.168.3.x dmz (not even touching that yet!) and outside I have a /29 subnet of addresses, 25 is the gateway, and 26-30 are my addresses.
I have simple dynamic nat set up on the .26 address to nat to 192.168.0.x. All I'm trying to do is port forward a simple tcp port I set for my linux server (192.168.0.2) on the inside, for arguement's sake, it's 2222 (it's not really). My outside vlan 50 is X.X.X.226 255.255.255.248 , can I make a static nat (inside,outside) x.x.x.226 192.168.0.2 netmask 255.255.255.255 ?
I tried using (inside,outside) x.x.x.230 192.168.0.2 netmask 255.255.255.255 and that didn't work either. Is it not possible to use two external addresses to hit the entire /24 range AND a single server?
My access rule for this nat is permit tcp any 192.168.0.2 eq 2222 (where I'm using 2222 for my ssh port). then I apply that access list to the access group interface "outside".
I thought the outside interface would do a proxy arp (since I do not have the sysopt noproxyarp command) for my 227,228,229, and 230 addresses where .226 is my internal nat for all my internal machines i.e. 192.168.0.1 -> x.x.x.226 . I had this working like a charm before with my fortinet, so I know I have systems listening.
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May 29, 2013
The Cisco 3560 uses a relatively simple classification scheme, assuming you consider only what happens when the forwarding decision has been made. These switches make most internal QoS decisions based on an internal DSCP setting. The internal DSCP is determined when the frame is forwarded. What internal DSCP setting means?
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Nov 21, 2012
I'm working on setting up a template configuration for the Cisco ASA 5505 device that we'll use to configure more routers for various client needs. One of the requirements requested of me is the following: Internal hosts assigned a DHCP address are blocked from the internet Internal hosts with a static IP are permitted access to internet All internal hosts can communicate regardless of state
Now, I'm fairly new to this and I'm certain my terminology isn't correct so googling the problem has been fruitless. I have followed basic configuration guides and have configured the device to hand out DHCP addresses to hosts plugged in ports 1-7. If I'm plugged in and specify my address manually in the OS I am blocked from any access so I can only assume there is an access policy or some rule preventing me from authenticating against the router despite having set up VLAN1 to be the entire class C subnet. What sort of steps would I need to do to configure this? New access lists. For the record, the dhcp addresses are in the range of 10.100.31.64-10.100.31.95. VPN users are assigned an address from 10.100.31.220-10.100.31.240 and there seems to be no issues with that configuraiton. I don't wish to constrain what addresses a user can use should they specify a static IP (10.100.31.5 should be just as valid as 10.100.31.100).
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Mar 12, 2013
I am trying to install Radius server for a cisco 2801 router. I am not able to configure it properly.
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Apr 14, 2011
How to set static IP of Inter net in one NIC and another NIC LAN IP how to set.After setting up Static IP we should use our webmail server and ERP works external.
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Feb 21, 2013
My modem is D-LINK WBR-2310. I am trying to set up a static IP for my Xbox 360, but am unable to. I have tried assigning it IPs from inside/outside my DHCP range, and nothing works. Every time I assign it a new IP, I forward the port in my router. My modem is an Embarg EQ-660R, and is bridged. My 360 is set up wired directly to my router (the only wired item I have). Every time I test the connection after forwarding the port, it (my 360) errors out at the first step of connecting to "network". I've searched the interweb to no avail trying to find an answer to this problem. I'm putting the IP address of the IP I choose in the port forwarding rules, this is correct, yes? General port forwarding question: What port are you supposed to choose for different games, say Battlefield 3, that I play on my PC? Is the port I choose in my router settings supposed to always be the IPv4 address within IPconfig?
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Apr 4, 2013
I have recently purchased one of the new ASUS RT-AC66U routers and this router comes with the new aicloud feature. This feature allows you to remotely connect into the router and access any external drive attached as well as your computers shared folders.My issue arises due my location. I live on a school campus and with this being the case, setting up an IP address that is static and is available from everywhere is not really possible. I have my router which I can setup with a static number but the school breaks theirs down so mine will never stay that way.I am trying to see if there is a way to make an address static using an update feature or something of that nature to constantly have a new IP when mine changes.
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Jul 17, 2012
I want to turn off DHCP and setup static IP addresses, but have some questions about applying the information to my specific system.I have a Cisco Wireless Router, 1-wired computer (windows 7) and 2-wireless computers (1-XP and the other is Windows 7). I also have a dual wireless print server, a Roku box, a Wii, a Kindle Fire, and Vonage which is connected between my cable modem and router (this was the preferred installation method by Vonage).I have ran IPCONFIG /All and have all the addresses. My concern is what to use as a static address for my router first off, and then how I go about picking IP addresses for the computers and devices, and how to set then up both at the router and at the computer or device. Also, do I need any IP address ranges for any of this? I'd also like to make sure it would be possible to setup this system with the Vonage adapter connected between the cable modem and router as it's setup now.
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