Cisco Switching/Routing :: Add Another External IP Address To Out 881
Nov 18, 2012
We have a Router with one External IP and a couple of VLANs. We have got a Teleconferencing Unit that needs almost every port known to man to work, so decided to get the unit its own External IP.
We have the IP now and how to get it in the router and then also to use it only for the Video unit (From outside straight through to Video).
Im comfortable adding lines to the router but just don't know what the lines should be.
The new IP's purchased are 116.199.222.200/30 (Only need to use one address, lets say 116.199.222.200). No idea what the subnet mask should be...
The router config below stripped of irrelevant stuff:
interface FastEthernet0
no ip address
!
interface FastEthernet1
[Code]......
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Mar 21, 2012
I am desperate to make some kind of translation which convert an outside IP Address of our web server to its inside ip address so that requests can be routed internally to the server.
This is what we have: A wireless network with an SSID to serve visitors. We also have an in-house web server which can be accessed internally and externally. We have a ASA 5520 that protects the internal network, including the Web server, and also routes all traffic from the all visitors connected to the public SSID to the outside. The DHCP server for the wireless network for visitors is configured to give the 8.8.8.8 as dns server. The problem with that is that the www.ourwebserver.com is resolved by Google's dns server to the public IP Address of our web server! The traffic then is sent to the outside interface of the ASA 5520. The visitor who wants to access our web server cannot connect!
How can I configure the ASA to route that traffic to our web server with the public ip address to the inside ip address of the web server?
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Mar 30, 2011
How can I change my external IP address which is assigned
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Jul 8, 2012
I have an old ASA 5505, and I'm having some trouble with Nat Hairpinning. I've done this with other firewalls before and I am having no luck now. I have an internal address that I wish to forward from an external address- so if someone goes to 123.456.789.012:3456 then it will forward to 192.168.1.244:92 (All numbers are arbitrary here- only for illustration). I have and Access Rule and NAT and PAT set up so that I can get in if I originate from outside the LAN. What I am trying to do is to have this work from inside the LAN as well- so that if I am at my desk, and I connect a device and type in 123.456.789.012:3456, it will deliver the content at 192.168.1.244:92. The problem I am having is that it just isn't working, and I cannot figure out why- When I started here, there was an address configured to work this way, and it still works- I just cannot find what is different between what I am doing and what the person who configured it did.
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Dec 25, 2012
how to properly route multiple external IPs to internal ips assigned to several servers. Where I'm getting a bit lost is that I have two levels of routing - one from the outside into a comcast business class cable modem, which also creates its own internal network. Within that internal network, I have my RV180 router, which creates another separate internal network in which the servers live (don't want the servers to have access to other computers within the Comcast Modem's internal network). I want to map the external ips to servers within the RV180 second level network.
To diagram:
Comcast Cable Modem
/
RV180 Computer(s)
/
S1 S2
An internal IP is assigned to the RV180 router. Suppose it is 192.168.1.100.
The cable modem itself supports NAT as well. Do I use NAT twice (on both cable modem and RV180) to route the external IP to S1 and S2?
Or do I modify the routing table on the cable modem? Then use One to One NAT on the RV180 to map the external IPs directly to the internals?
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Mar 5, 2013
I have a little problem with a redirection. When I type my external ip, I am directly connected to my Cisco 861 ( through port 80 (HTTP))
Even if I do a factory default, I always have the same problem. I try to make another redirection on another internal ip , but always same problem...
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Mar 20, 2013
I have an internal DVR system that I am trying to share to the outside world. We recently put in an ASA5505 and I am having trouble getting the settings correct.I want to use an external IP to access the DVR system from anywhere and have my ASA5505 redirect the traffic to the internal IP address. I assume I need to use a NAT and a route policy however can not figure out how it would be.
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Oct 27, 2011
6509-E compact flash Internal vs External
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Nov 13, 2012
we recently upgraded from an RVS4000 router which didn't have this issue.
the problem; Internal users from Site A cannot access the external owa address.From Site A i can successfully ping both the external/internal IP addresses/names and they resolve correctly, including pinging the address ('mail.company.com") resolves correctly to the external ip address.
[code]...
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Apr 14, 2011
We have a Cisco 871W working as PIX, controlling external VPN connections to our private network.The configuration is very similar to the one described here - "Cisco Router as a Remote VPN Server using SDM Configuration Example" url...
About once a week, it stops working, without aparent external intervention.The ping to the external IP stops answering, and the internal IP stops answering pings also.The solution is power-off and power-on, and it starts working again ...
What is the correct way to debug this situation ?I can connect a HyperTerminal using direct cable to the 871, but dont know the relevant commands to debug this situation.
Is there any LOG I can have a look into ? Yes, I am quite new to Cisco world .By the way : "show version" says Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.4(15)T7, RELEASE SOFTWARE (fc3)
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Nov 16, 2011
Can the SRP547W be configured to allow traffic on port 25 from an external ip range to an internal address?
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Oct 7, 2012
I am observing some strange behaviour related to the routing table, almost all external routes and some inter-area routes are getting refreshed every 10 seconds.
I am getting more than 1000 entries after running 'sh ip route | i 00:00:0', these external routes are being advertised by a neighbor 6500 which redistributing these static routes.
Platform is 6500 with SUP-720
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Apr 3, 2013
1. How I can manage those devices, the Switch and the router? What is the BEST SOLUTION to manage this devices?
2. I want to monitor the traffic on this environment, how I can do it? How I can monitor the traffic from customer A, Customer B, and my own LAN traffic, in terms of bandwidth that has passed throught my devices? Is it possible to monitor on MY LAN, or I have to monitor from the EXTERNAL switch?
3. How I can limit the bandwidth? I was trying to configure it using access list, with policy-map, etc....and limit this on each interface. [code]
The interface does not support the specified policy configuration and/or parameter values.Assigning a policy map to the output side of an interface not supported.With I few reading, I could see that the SWITCH 3750 doesnt support this configs.My INTERNET LINK is 30 Mbps, the ports on the Switch (WS-C3750X-48P-L) are Gigabit Ethernet.How I can limit the bandwidth here? For example, How I can limit a interface to 3Mbps..I was thinking about this:
- Limit the interface to 10Mbps: speed 10
- and limit the interface with 30% of this speed: srr-queue bandwidth limit 30
Does this work for both UPLOAD and DOWNLOAD?When the packets passes that 3Mbps limitation, will they be droped?
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Mar 19, 2012
Where can I find a list of supported external HDDs or NAS devices for a Cisco 857w router?
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May 23, 2012
My IP adress has always been external. About 2 years ago, after reinstalling my windows,(I am using and used before reinstalling windows7) my IP adress started to work as it wouldn't be external. I couldn't host servers and stuff like that anymore.I tried turning off firewall, few other tricks but nothing changed.When I look information about my IP adress ,most of the sites see it as external.Also, when I call my interned providers, they tell me that they see my adress as external.
Some details :
-Internet is provided by a cable (not using telephone, TV or something else from those internet dealers)
-I am alone using this internet, no one else is connected to it.
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Jul 26, 2011
I use an online software host. They put print jobs into a queue and send them directly to my printer. I just got a new printer. The software host needs it's "External IP address" I have my internal IP address. I pinged the printer and got my internal IP address instead of the printer's. I am on a home wired network running through a modem and router.
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Aug 19, 2012
We have a strange issue for one of our customers that recently migrated to our internet service.They are trying to vpn to an external ip address not controlled by ourselves. The issue is only on one subnet and isolated to Mac’s, PCs in the same subnet also work fine. They were able to vpn from the MACs before they migrated to our INET solution. They previously used a checkpoint FW for their outside NAT and firewall and now are using a failover pair of asa 5510s. I have packet traced out the firewall and there should be nothing blocked. UDP ports 500 and 4500 are open to the destination ips from the correct subnets. All other subnets with Windows PCs can vpn out to external ip without issue. The users in that subnet with the MACs can also browse internet fine so the routing and nat overloading is also ok
When they try to initiate a connection from the macs i can see the connection/xlate coming in from a source port of udp 4500/500 and also a destination of udp 4500/500 instead of a random source port. Just this evening we managed to get one device connected but no others. Would the fact that the source port is claiming 500 and 4500 stop the other macs using the same source ports at the same time to connect out? They are using the onboard mac vpn client, he can’t get the Cisco one working at the minute. [code]
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Oct 11, 2011
Whats the difference between DNS Server and External IP Address? When I dump Ipconfig /all into a .txt file I see that it shows three seperate values for the DNS Server. My question is, since ipconfig /all does not give an external IP address, are they the same? Why are theyre three?
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Oct 12, 2011
We once had a virtual server with two network adapters, one was internal and the other was external, and people could access it directly from the internet.
That server recently, died (someone put the .VHD file on a massive RAID 0 array, and that went boom), and I need to set it back up again. All the DNS entries appear to still be there, but how to assign the external IP to the network adapter. I tried Google, but my Google-fu must be weak today as I can't find anything useful.
It's a Server 2008 R2 machine running inside Hyper-V. Nothing's changed except for the new Windows install, it's running with the exact same VM settings, which I didn't touch except to add a new VHD.
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May 22, 2012
I have a client that has 2 servers behind the same router. They have an IP block from Time Warner -> (x.x.x.18-.30) The router has the IP address of x.x.x.18. Server A (192.168.1.6) is setup with the forwarding of ports 22, 23, and 115 and can be seen with the ip address x.x.x.18. An external company needs to access the other server and is requesting an external IP for Server B (192.168.1.5) which need the same ports open along with 6200.What is the best way to set this up with what they have? The router is a Linksys WRT54G. Is there a way to set them up with a x.x.x.19 address from time warner? Is this something time warner will need to do?
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Mar 3, 2011
I have a home desktop, home laptop, and work laptop that I use. I have Ultra VNC setup on my work laptop that allows me to remote into that machine when I am traveling for work. I have always been able to use the external IP address (not private) to login into the machine with no problem. This week, for some reason, I can no longer do that. When I started doing some discovery, I noticed that when I have all 3 machines booted up at home that the exact same external IP address is assigned to all 3 machines. The internal IP addresses are all different as they should be.Shouldn't each machine have a seperate external IP address assigned as well? Or is this working the way it should? I didn't change any setting on my router or DSL model. But I think the conflict that VNC is having on my work laptop is that it has the exact same IP as the destination computer and it fails. I can remote in if I use the private IP address (192.168.x.x) just fine.
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Oct 28, 2012
Our company uses a commercial copier monitoring package called FMAudit to obtain meter readings from our clients' copiers, and it uses a feed to send the readings back to us. We have used port 90 for this purpose.Due to a recent server crash and emergency reconfiguration of our network, we have moved our FMAudit central server from in-house to a hosted service, with of course a different external IP address.
Without interfering with our other systems, is there a way to redirect JUST PORT 90 to another IP address external to our own? I don't care if it has to happen at the router or server level. We are using Server 2003 and a Cisco 887VAW.
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Sep 15, 2011
The problem is that the PABX is sending out an internal address in it's INVITE messages and the ASA5505 isn't changing the internal address to the external address.We need> From: Calling Number <SIP: SIP Username@Public IP Address>However our PABX sends out> From: Calling Number <SIP: SIP Username@Private IP Address>. How to translate the internal IP address to the external IP address on an ASA 5505?
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Sep 17, 2012
Accessing exteral address internally.
I have a mail server, with external access which works fine for external access thorugh our router (a 1941). I have a laptop which connects to a wireless network that is inside our router. When attempting to navigate to the webmail or use outlook, it cannot connect.
The laptop is configured to access the mail through the external path as it would be offsite occasionally.
I think the problem seems to be that the traffic is not leaving the router to come back internally. The laptop can ping the external address ok.
I read about something called hairpinning - is this what i need to be looking at?
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Mar 13, 2013
We have an ASA 5505 and are changing ISPs so we'll be getting a new static IP address. How do I change the external IP address using ASDM? (I haven't done it in 5 years so I'm rusty and just want ot make sure.) The ASA and ASDM are up to date.Am i correct in that I only need to change the external address in the configuration under Interfaces, then under Routing - Static Routes - Gateway IP I just need to enter the new WAN gateway address?
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May 30, 2013
I have an old ASA 5505, and I'm having some trouble with Nat Hairpinning. I've done this with other firewalls before and I am having no luck now. I have an internal address that I wish to forward from an external address- so if someone goes to 123.456.789.012:3456 then it will forward to 192.168.1.244:92 (All numbers are arbitrary here- only for illustration). I have and Access Rule and NAT and PAT set up so that I can get in if I originate from outside the LAN. What I am trying to do is to have this work from inside the LAN as well- so that if I am at my desk, and I connect a device and type in 123.456.789.012:3456, it will deliver the content at 192.168.1.244:92. The problem I am having is that it just isn't working, and I cannot figure out why- When I started here, there was an address configured to work this way, and it still works- I just cannot find what is different between what I am doing and what the person who configured it did.
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Aug 24, 2011
We have a new Cisco ASA 5550 that I am trying to configure. We are currently using a borderware firewall.
We have multiple external IP addresses and I can NAT traffic from all except for our external interface IP address.
When watching the packets in the ADSM monitor if the IP address is our external IP then I see nothing unless it is ICMP. I can ping the IP address just cannot do anything else with it.
All the rest of our provided IP addresses can be NATed and work correctly.
Traffic for our external interface IP does show up when we use the borderware firewall so we know the traffic is getting here.
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Jan 22, 2013
I have a EA3500 wireless router with the new style (smartwifi) firmware. I've scoured the web admin interface and can't find any sort of 'status' page that would tell me the external IP. I've looked through the support docs but they only show how to find internal/local IP.
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Aug 22, 2011
I couldn't find a section for the 651.
Alright so I have an SSH server running on my network. I can successfully connect to it from a local computer using the server's internal IP address, AND I can connect to it from a remote computer using the server's external IP address (it's properly port forwarded).
However, when I try to connect to the server from a local computer using it's external IP address, I get a connection refused error. Is there something I'm missing?
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Nov 29, 2011
Basically I have a group of static public IPs and I need one of them to point to an internal server IP address. This is for the RVS4000 router.
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May 4, 2011
I 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. Any example configs?
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 10.10.1.2
So 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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Jul 8, 2011
I have a WAG160Nv2 and I want to block specific external ip addresses from trying to get at our server that uses the WAG160Nv2 as an internet gateway. It's not immediately obvious if this can be done from looking through the config pages.
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Dec 28, 2011
This is my first time trying to configure a WAP for out network. I have an AP1141 connecting to an SG300-28 switch. The subnet for my WAPs is 10.10. 40.0/ 24. The rest of my internal network is 10.10.10.0/24. There are four other WAPs on the 10.10.40.0/24 network that I did not configure. When I assign an IP address - 10.10.40.7 to my WAP with the gateway as 10.10.40.100 (router), I cannot ping anything. If I assign the WAP an IP address - 10.10.10.192 with the gateway 10.10.10.100 (router), I can ping everything.
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