Cisco VPN :: 2811 - Static NAT Causes Unable To Access Server Via Internal IP
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?
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?
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.
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
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"
This isn't a big deal as the rest of the ACL works fine, but this is an annoynace since the web auth redirects to our company website (internal for now) after successful login.We have a Cisco WLC that provides access to our production and guest wireless environments. The guest environment of course is in a separate vlan (10.10.50.0/24). So I created this ACL:
access-list 107 permit udp any host 10.10.2.13 eq bootpc <----internal DHCP server access-list 107 permit udp any host 10.10.2.13 eq bootps access-list 107 deny ip any 10.10.0.0 0.0.255.255 <---all internal networks access-list 107 deny ip any 172.28.16.0 0.0.0.255 <----DR Network access-list 107 permit ip any any int vlan 50 Desc "Guest wireless network" ip access-group 107 in
This ACL basically gives the wireless guests access to an internal DHCP server and full access to the internet. For the 10.10.50.0/24 scope, the DHCP server assigns Internet DNS servers and my rationale is that wireless clients would access it via the external IP address but I suppose it doesn't work quite like that with the website being behind the same router as the client machines.
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
I have a base config of AnyConnect VPN below, however the ASA 8.3.1 code has deprecated some commands and the VPN/NAT/FW rule syntax is quite different. Can som point out what's missing from the pertinent config below that prevents the VPN Pool from accessing the internal LAN?
The Core LAN router is 1.2.3.1.
! ASA Version 8.3(1) ! interface Ethernet0/0 nameif inside security-level 100 ip address 1.2.3.2 255.255.255.0
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.
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.
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.
i cant resolve one problem in may 1921 isr router, i have a web server in my internal lan , i set up static nat for accessing that web server from outside and it woks fine but i cannot view that site from internal workstations can you suggest me what to do. as i know when request gets to router it performs static nat and sends packet to the web server, but the server responds with its private source address instead the public address witch workstation expects and connection cannot established.
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.
I had an Linksys WRT54GS and this wireless is connected to a switch in an internal enviroment but i want connect guest users without them see my internal network and can't access to any internal server....how can i configure this?
I purchased the EA6500 a few days ago, and when I'm connected to Cisco Connect Cloud I am unable to select Folder Access / FTP Server / Media Server. I click them and nothing happens.Also, the Cisco light on the router keeps blinking.
I want to do with my ea4500 is assign it a static IP and access it after doing so. But, no matter how many times I try, I cannot enter its IP address in the address bar and see its settings. I change its IP to192 168 1 200. Subset 255... DG 192 168 1 1 DNS same.Under router address 192 168 0 1I CANNOT access this router at 192 168 0 1 at all. The thing is, the **bleep** settings are not any different the. How they were when it was WORKING. I literally took a screenshot of my setting in case a scenario like this would come up, yet it more problems arise. The only way I can access the router is by doing a factory reset and accessing it at 192 168 1 1.
I faced up with a strange configuration issue at my 2811 router running IOS C2800NM-ADVIPSERVICESK9-M, Version 15.1(3)T. The configured Dynamic and Static NAT do not work (users can't go out to Internet and can't reach internal services via external IPs).The configuration seems to be very simple (one internal and one external interface, one address for dynamic NAT pool, and only few static translations -- see attached file).
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.
My 2811 is connected with two ISP,s as below and have VPN with Central branch.I want to set DSL as primary and WiMax as secondary but problem is that routes learned via BGP get precedence over default route as they are specific one.I think i may need to put all static specific routes of central branch over DSL along defautl but I want any idea if my default route stay active and when it down then BGP neighborship can be establish (like ip sla tracking.)
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.
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.
I have 2 connections a single T1 for voip traffic only and a DSL line for data traffic.the dsl was migrated to a 2811 with out any issues now comes the time to move the T1 over.
on the T1 side I am able to ping the WAN router and the LAN router IP address but nothing behind it.
currently this is the only statment on the router: ip route 0.0.0.0 0.0.0.0 Dialer1
as a quick a dirty to remove the above i tried: no ip route 0.0.0.0 0.0.0.0 Dialer1 ip route 66.55.110.0 255.255.255.0 Dialer1
but the DSL side dropped. we have a 66.55.110.152/29
for the T1 i would use the following statement.. we have a 209.98.53.192/27
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.
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).
configure Cisco Ace 4710 ?Note :- Just a testing face I need to access my one server(192.168.1.11 : 80) through VIP :- 10.13.77.10 , I have only one Cisco Router 2800 and One L2 Cisco Switch 2960 and Cisco Ace 4710 . So I already configured 2 Different VLANS in Switch (Vlan 10 & Vlan 100) and by router I given the ip address of that Vlans with Inter Routing Vlan. My Connectivity is like this :-- Router Ethernet 0/0 --- 10.13.77.1/24 with vlan 10) & Router Ethernet 0/1 ---- 192.168.1.1/24 with vlan 100 ) connected with switch after that I configured ACE LB and connect the ACE interface with switch Like that ---- Connect to ACE Interface 2/3 vlan10 with switch vlan10(Ethernet port 2-12) and Connect to ACE Interface 3/3 vlan100 with switch vlan100(Ethernet port 13-24) .Testing to access server from Switch Vlan10 to Vlan 100 where my server is there.
Configuration :---
ACE> client side Vlan10 (10.13.77.4/24) , VIP :- 10.13.77.10, SM-- 255.255.255.255 ACE> server side Vlan100 (192.168.1.5/24), Web server -- 192.168.1.11 with 80 port ACE> Managment Vlan 1000 (172.16.6.5/24) , ip route 0.0.0.0 0.0.0.0 10.13.77.1
I already Configured in Routed mode but From Vlan10 ip subnet example like 10.13.77.12(Client or User PC) tried to access server 192.168.1.11 with VIP http://10.13.77.10 but not responding , if i access server with real IP then accessible (why boz there is inter vlan routing)?
I hav a Network area storage server where all my files are stored. The Folders are shared on the network the shared folders were working fine but suddenly i was unable to access these folders .I tried to Map the network drives by IP address that is ""\ipaddressshare""of the NAS server but was unable to do so. It Gave me an error message ""No Logon Servers are currently available"" . But when i put my server Name that is ""\servernameshare "" i am able to map the folders. Why am i unable to access my shared folders on the NAS server by IP address . I have checked the IP adress connectivity and everything but it is all fine .I can even ping by ip address of the NAS serve
I can connect to the network but doesn't connect to the internet. I have tried a lot of ipconfig cmd's /renew said "unable to connect to dhcp server" and others didnt work all out of ideas.
I am having trouble trying to configure my cisco 2509 cisco router for access server. I have two guides shown below: URL and URL
However I am running into some problems. I can go through the second guide up until it asks me to do this command
Step 5: Configure the transport input protocol on the async lines to Telnet. Access_Server(config-line)#transport input telnet
I cannot put in Transport Input, I only have the option of doing Transport Output let me show some lines from my console:
--------------------------- Access_Server(config)#line 0 14Access_Server(config-line)#no execAccess_Server(config-line)#transport input ?% Unrecognized commandAccess_Server(config-line)#transport ? output Define which protocols to use for outgoing connections preferred Specify the preferred protocol to use Access_Server(config-line)#transport ------------------------
Im not sure whats going on. I have two routers(cisco 2600 series) plus my 2509 cisco router I am going to use for a access server. I have a two switches 2950 series and I have the access server connected to all of them via a octal cable.
Here is the configuration from the access server:
-------------------------------------- Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2) Technical Support: [URL] Copyright (c) 1986-2008 by cisco Systems, Inc. Compiled Mon 17-Mar-08 14:39 by dchih cisco 2509 (68030) processor (revision M) with 14336K/2048K bytes of memory. Processor board ID 22840809, with hardware revision 00000000 Bridging software.
I have setup a home lab for my CCNASecurity studies and have purchased a 2511 to serve as an access server. The 2511 was advertised as fully operational but when I powered it up this is the first error message I get.....
ERR: Invalid chip id 0x80B5 (reversed = 0x1AD ) detected in System flash
From my research it appears this may have something to do with an old ROM and newer flash, here is the ROM info....
System Bootstrap, Version 4.14(9.1), SOFTWARE Copyright (c) 1986-1994 by cisco Systems 2500 processor with 16384 Kbytes of main memoryHere is the info on the IOS..
[Code].....
Could this be a simple as a ROM upgrade which I have found on eBay for $10.00? Or do I have a larger problem?The boot continues appearing normal until it gets to ....
%SNMP-5-COLDSTART: SNMP agent on host Terminal is undergoing a cold start and then completely hangs.
Network error code 0x80070035 The network path was not found.
I read the previous posts on this error code but my sceanrio was not addressed. Dell Optiplex 980 i5-750 2.66GHz w/4GB RAM running 64bit Win7Pro SP1 and 64bit Symantec Enterprise Protection v.11.0.630
File server is Dell PowerEdge 1900 running 64bit Win 2008 standard server w/o hyper-v, SP2 and 64bit Symantec Enterprise Protection v.11.0.630
I support an OU in a large university domain. Myself and one other user are the only people experiencing this issue in an OU comprised of over 20 machines.
For some reason I cannot seem to get a connection between the router and the switch. I see the FE ports on the siwtch, sh ver includes all 18 FE ports, but it seems that there is no backplane connection. The only way I can get conenctivity to the switch module is to jumper between one of the routers FE ports and a NM port. The switch will not accept any IP addressing on the same network as the router becasue of overlap. Am I just being stupid? My understanding was this NM would have a backplane connection to the router. Some docs mention a GE conneection that should show up and there were two parts to the config, one to set up the interconnect and then to set up the switch.
I've setup a NTP service by using Cisco 2811 routers. This works fine at the moment, but in the end there are some questions left.
1. I'm using two 2811 Routers, one for primary, which is resceiving the time from PUBLIC NTP 1, and one for backup, which is resceiving the time from PUBLIC NTP 2. Is it possible to compare these to times an check if the match? And if not, generate an alarm via e.g. SNMP
2. Is it possible to check via SNMP, if the routers are reaching PUBLIC NTP 1 and PUBLIC NTP 2 for sync?
