Cisco :: Internal Server Is Not Accessible From Outside Static?
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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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 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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Feb 1, 2013
I am experiencing one, possibly two problems with the X3000, firmware release v1.0.03:
1. When enabling guest mode, the internal network is not accessible via WLAN even for clients NOT connected via guest mode but regularly: Even non-guests but regularly connected clients can't access any internal IP but the router itself. netscan shows only the very client's IP and the router's. Only after switching guest mode entirely off, regularly connected clients can access interal IP again. netscan correctly shows the whole network. Obviously a firmware bug. BTW: Clients connected via cable do not experience this problems.
2. I am not sure about this, but after using the firmware built in "Reboot" button, the router reboots correctly. But for some reason, it is instable afterwards. It is operational for a few seconds but then reboots again. It keeps cycling. I could stop it by switching the router off and on again.
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Mar 26, 2012
setup my Foscam IP cam lastnight on the Wireless network using UnPn and was able to access it fine via the public IP , using another PC on the same network with no issues. However when I tried to access it from work it doesnt connect - Is there a firewall setting that im overlooking?
FYI im using a Netgear CVG824G
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Mar 19, 2011
I'm working on a small network (1 server, 6 workstations, stand-alone, not connected to the main Company Network) "reinstalling" a Workstation. Re-imaging from semi-generic Norton Ghost image (4 of the 6 Workstations run the same programs with different addresses). I then had to reset the IP, the Computer Name, and then the Domain (I did it in that order).
I'm using Windows Server 2003 as the domain controller, and the Workstation is Xp Pro Sp 2.
The Workstation is using the same IP, Name, User as before, and they were working with the server previously (a program had corrupted prompting the reinstall).
The problem is that if I open windows explorer and type in the Workstations IP (\000.00.0.1) I get access to the computer. But if I go there and type in the Workstations Name (\Computer01) I get a "you may not have permission to use this network resource" error.
If I go to the work station, and try the same thing except with the Server's IP (\000.00.0.100) and Name (\Server01) I get access.
This Workstation controls an I/O device that is used by a program running on the server (most of the time, not while I'm doing the install of course) and the program uses the Workstation's Computer Name to access it.
As far as I can tell all the settings on this Workstation match the 3 that are running the same programs, but I could have missed something.
I'm a bit stumped by this, I don't normally deal with the Server side of the computers. I usually just set up the workstations to whatever Name/IP the Net-admins give me. But my bosses put me in charge of this little network, mainly because the Net-admins din't want to deal with it.
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Oct 7, 2012
In my client office, We have replaced small business router cisco RV042 with Cisco ISR router 2911, in that router we have configured NAT to allow internal user to access internet and port forwarding for outside user to access web servers and other application that are hosted internally.
we are not able to access [URL] (name changed) from internally and one of the application that are runnning on port no. 8280., and same is working properly from outside the network.other application that running on 8287 is accessible form internally.
We are accessing with ip address http://192.168.1.51:8280. and [URL] not working from inside.
But all works fine with old cisco RV042.
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May 21, 2011
I have a question that�s been bugging me and that internet searches didn�t quite explain and that is how do I make a resource available publicly e.g. web serverAll I hear so far is register a domain name but that doesn�t quite answer the full question. Id like to know exactly what happens when a user types in the url of my web site and how their traffic gets to me. Is it.. get a static ip from my isp then provide this to the domain name registrar and that it now every one can access my site?? Seems to simple.
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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 8, 2012
My web server was down for the day now it's back on but the ASA not accessible with error drop rate-1 exceed
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May 24, 2010
I`ve had a problem with my WAG320N for some time now.I`ve add a 1,5Tb hard drive to the usb and I can access it at LAN.Now I want to take it a bit further and be able access it from the outside.
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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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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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Mar 26, 2012
I have a domain with a domain controller Server 2003. I have a backup dc running an application with server 2008. The shared folder I am trying to access is on an nt server 2000. We have had a mapped drive "I:" and have used it for years. Our copier also scans to a shared folder on the server 2000 machine. All of the desktop systems are xp sp3 with one W7 machine. A couple of weeks ago when user attempted to access the shared/mapped drive, an error would occur that "the drive was in use and they could not be logged on". Sometimes the error would say "you don't have permission to access the drive." Mind you no settings have been changed on the network. When either of these errors would occur it would occur for everyone but if I rebooted the server everyone could connect again. The same errors would occur the next day or 6 - 8 hour later. Now the error has occured "Drive is already in use and you cannot be logged in" (I have tried drive Z as well the drive is not in use) and restarting the serever no longer works. No one can access the shared drive. I have unmapped the drive on my system and have attempted to reconnect, I enter the path and check reconnect at logon and it asks for a password. I enter the administrator password (which is what I always used) and it just pops right back up asking for a password as if I entered nothing. I can ping the server with the shared folder and even logon remotely so I know it is not a physical disconnect. I am not sure what changed and have followed many suggestions found to no avail. We cannot access the shares or scan.
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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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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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Jul 20, 2012
my laptop sometimes gives a 500 internal server error when I try to go to any website. our other wireless devices such as our phones don't do this while the laptop is.
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Jan 19, 2010
The RV082 is a great unit, however when VPN clients connect the QuickVPN Client has a setting to use the Remote DNS settings of the RV082. The RV082 has no way of linking or using a user-defined DNS. I have an internal DNS Server that I would like the VPN Clients to query on internal name lookups (kindof the point of having client vpn, so they can access internal network shares etc. On the diagnostic page the ping and name resolution can only check external DNS and internal IP's. Wouldn't it make sense to at least make the RV082 aware of internal DNS Servers? Then the Ping and DNS lookup would be able to test both zones? Is this something that can be looked at by Linksys Developers for this product? The WRV210 (a cheaper and lower level model) has this functionality.
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Aug 19, 2012
Problem about authentication in VPN 3000 but until now I haven't had return on neither of the post maybe those I'm more clear than others.
I have a VPN 3000 with PPTP Tunnel VPN and the first authentication option is on Server Radius:
Configuration > System > Server > Authentication is firstly the Server Radius and after Internal ( Authentication on Base Group Internal )
But, when I configure a user in User Management > User it isn't work. I think that authentication order is firstly Radius and if it don't find the second option is processed which ( this case ) is Internal server. but don't occour the error in log is:
44 04/20/2011 00:00:08.550 SEV=3 AUTH/5 RPT=137 187.55.63.215 Authentication rejected: Reason = Authentication failurehandle = 299, server = (none), user = x1, domain = <not specified>
46 04/20/2011 00:00:08.550 SEV=5 PPP/9 RPT=135 187.55.63.215 User [x1]disconnected.. failed authentication ( MSCHAP-V2 )
how is the behavior the VPN 3000 when the firstly server ( this case a Radius ) don't be find ?? the second it's processed ??
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Mar 26, 2012
For a config on a 2821 router with IOS 15.1?I've setup an internal web server and am able to acccess it from outside our network but not from inside (on a separate internal LAN - 192.168.10.0). When on the internal LAN - DNS points to the Public IP for the web server - so we'd need to route through the Public IP to access the web server.
What is the best way to allow access to the web server XX.XX.XX.231 from 192.168.10.0 network?
Related Config Lines to Allow Access to Web Server
NAT
ip nat inside source static tcp 192.168.1.230 80 XX.XX.XX.231 80 extendable
ip nat inside source static tcp 192.168.1.230 443 XX.XX.XX.231 443 extendable
ACL
ip access-list extended WAN
permit tcp any host XX.XX.XX.231 eq 443
permit tcp any host XX.XX.XX.231 eq www
[code]....
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Sep 21, 2012
I need to configure my ASA 5520 version 7.3 firewall to translate our SMTP server residing in local LAN to use different IP address from the outside interface which is used by all other computers to access Internet. Under NAT section, I have NATted this internal SMTP server with different IP address(eg x.x.x.1) and also translated the remaining IP addresses in the LAN to the outside interface(eg x.x.x.2)
my problem is, Whenever i check the header for message coming from the smtp server it shows that, the SMTP server is also translated by using the same outside interface public ip address(i.e x.x.x.2) which is used by other client machine to access internet instead of the x.x.x.1. How I can get my SMTP server to use separate IP and avoid to be blacklisted by some domain.
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May 24, 2012
I write here to see if some kind soul can not solve my problem (which is common to seeso many people around the world). problem: I have a mail server (192.168.1.17) configured static NAT because it is accessible byPublic IP (PPP.PPP.PPP.PPP). Everything works properly from the outside, but if I get my Mail server (on port 443) from the internal network (192.168.1.xxx) there 'verse. This configuration is called Nat inside-to-inside is done by default by some SOHO routers(such as the TPLINK from 25 euros) but Cisco did not succeed. I search on the internet for 2 days without a get nowhere. PS: I have a Cisco 1801 router. (or 1941 as another 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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Feb 21, 2012
I'm new to the Cisco world and have so far got internet and VPN working (without SDM) using the IOS commands.I have hit a stubling block with port forwarding ports 80 (http) and 443 (https) to my small business server for outlook web access.I need to forward port 80 and 442 to internal LAN server 192.168.10.1.The Cisco 877 has a local IP address of 192.168.10.254. [code]
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Feb 10, 2013
I add a new Cisco ASA 5505 as firewall in of company network. I found the PPTP authentication did not get through to internal Microsoft Server.
ASA Version 8.4(3)!names!interface Ethernet0/0switchport access vlan 2!interface Ethernet0/1switchport access vlan 2!interface Ethernet0/2!interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!interface Vlan1nameif insidesecurity-level 100ip
[Code]....
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Mar 2, 2012
I have 3 external ips from my isp:
222.222.222.221
222.222.222.222
222.222.222.223
The first one I use to provide internet access to my office. The other two I'm going to use for the following: I'm going to deploy a server in internal network which must have 2 external ips on his network interface (& one internal ip on the second,but that's ok: I cannot put an extra network switch before asa & plug this server there: this server is virtual & is on esxi host in internal network. External ips must be assigned to servers' interfacw,bot just forwarded there (ms direct access requirement).
My current config:
!
ASA Version 8.4(3)
!
hostname msk-office
[Code]....
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Aug 15, 2012
We have setup a new internal web server so now we have two internal web server and both or hosting sites on port 80. Currently we have port 80 forwarding to one of the web servers and users are able to hit it from the outside.
Is there any way to configure the RV042 to route web traffic to the correct web server by using the site name or dns? If a user puts in the address{URL}, be routed to one web server but if they put in {URL}, be routed to our second web server. I've checked with our vendors and the both web servers applications need to run on port 80. If we have forwarding setup on the RV042 to forward port 80 to web1 then users can't access web2 from the outside?
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May 7, 2012
I am hoping to get your feedback around the dhcp issues I am facing with Two Centrally Switched Wireless LANs. The setup is as follows:
- I have a WLC 5508 which has been configured with 4 SSIDs, out of which 2 are using Central Authentication and Switching. - I have an LWAP connected to the WLC in HREAP mode. - WLC is configured as the DHCP server for clients connecting to the SSID 'Guest'. For the rest, I am using external dhcp server. - Only one scope for Guest Interface is setup on the WLC.
Problems:
1. As far as I know, for WLC to act as internal dhcp server, it is mandatory to have the proxy enabled, but the Clients connecting to SSID 'Internet' are unable to get an ip address from the external dhcp server, if dhcp proxy is enabled on the WLC. If i disable the proxy, it all works fine.
2. DHCP does not release the ip addresses assigned to clients even after they are logged out.
3. If a machine which was earlier connected to 'Guest' SSID connects to the 'Internet' SSID, it requests the same ip it was assigned by the WLC which it was assigned under 'Guest', but gets tagged with the V LAN configured on the management interface.
************Output from the Controller********************
(Cisco Controller) >show sysinfo
Manufacturer's Name............. Cisco Systems Inc.Product Name................ Cisco Controller Product Version................. 7.0.116.0Bootloader Version................ 1.0.1Field Recovery Image Version..................... 6.0.182.0Firmware Version..... FPGA 1.3, Env 1.6, USB console 1.27Build Type.......... DATA + WPS + LDPE
[code]...
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Jul 21, 2012
A client wants us to use the internal DHCP server on a 5508 instead of Windows DHCP. They will have 15 APs initially and upto 25 later. The docs on the 7.2 WLC make it sound like this is discouraged: Internal DHCP Server.
The controllers contain an internal DHCP server. This server is typically used in branch offices that do not already have a DHCP server. The wireless network generally contains 10 access points or fewer, with the access points on the same IP subnet as the controller.
In this case, the APs will not be in the same subnet as the Managment Internet.Is it a mistake to use the internal DHCP with upto 25 APs (3 WLANs)?
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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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Jul 4, 2011
I have a hosted web server that has a website on it that needs to connect back to a database within our internal network. We have a Cisco WRVS4400N Wireless Router with 2 VLANS. VLAN 1 goes to a Watchguard Firebox which is connected to our internal network. VLAN 2 goues to our classroom network.
Our database is on VLAN 1. I have opened port 1433 on the Watchguard to allow SQL traffic from our Web Server. I can telnet from my workstation on VLAN 1 to the Web Server over port 1433, so I know the Web Server is not blocking anything. When I try to telnet from the Web Server to our Public IP address over port 1433, it fails.
I believe I have the firewall on the Cisco WRVS4400N off, so it shouldn't be blocking any traffic, but for the life of me I can't get this to work. I have been working on this for two days, and I NEED it to work. This was working up until last week, then it quit working. I am the only person making changes to our network, and there were no changes made during that time.
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