Cisco Infrastructure :: 1811 IOS DHCP Server And DNS Host Record Look-ups

Apr 26, 2011

I have an 1811 configured with dhcp scope and generally it works correctly. I have a host on the vlan/subnet that the scope is assigned that can receive an IP and all the specifics from the dhcp server. [code]

The host on the vlan/subnet should use the router as the dns server to resolve static hosts that are configured on the router itself. Can an IOS DHCP/DNS server do this?

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Cisco WAN :: PPPoE Server With DHCP 1811

Oct 18, 2007

I am working to test the PPPoE solution. The requirement is that she like to have a PPPoE server (7200), enable the DHCP pool on the router. The PPPoE client (1811) should receive the IP address through the DHCP and with subnet mask (/24) so that routing protocol can enable between the PPPoE server and client.We test with some initial configuration but not success to obtain DHCP address from the pool.
 
On PPPoE server router,
!
ip dhcp pool DHCP-PPP
network 192.168.254.0 255.255.255.0
default-router 192.168.254.254
[Code]...

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I have an ASA 5505 with software version  8.2(1). It is making DHCP  requests for IPSec clients that connect to the ASA. The DHCP requests  packets the ASA makes have an extra '00' appended to the hostname field,  and the length field is the size of the hostname + 1. The DHCP server  is Microsoft Server 2003 and this causes the hostname to be registered  with an unknown character which appears as []hostname. Then when server  2003 tries to update the DNS record, it fails because of the invalid  character in the hostname. Is there anyway to have the ASA have the  correct length for the hostname field in the DHCP packet, or a  workaround that will solve this problem?

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Having a hard time hosting my email service on my DS212J. To be I honest, I have no idea where to start.

Info:

IP Address using Synology DDNS: example.synology.me
Domain: example.ca

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i am facing the same problem now but am using windows 2003 server

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recently I had some malware on my Windows XP Professional (version 2002), so I followed a guide at Bleeping Computer [URL] to get rid of it. Problem is, for some reason, after I finished, I could no longer access the internet!When I try, FIrefox gives me their "could not connect" message: "Server not found. Firefox can't find the server at [site]." Check the address for typing errors such as ww.example.com instead of [URL]"When I try to log into MSN, the troubleshoot says I have a problem with my DNS and Key Ports.I'm not good with computers so I Google'd and found some ping-ing instructions. When I tried to ping [site], I get: "Ping request could not find host [site]. check the name and try again." This happens regardless of the site I use.Lastly, I tried "ping 127.0.0.1" from a troubleshooting site. It gives me: "Pinging 127.0.0.1 with 32 bytes of data:

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

[code]..

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I am having some trouble understanding extended control lists. I am trying to prevent a certain host on LAN1 from accessing a server on LAN2, while still allowing the host access to the rest of LAN2.This is what I thought the command should be:

access-list 100 deny ip 175.16.1.2 0.0.0.0 175.17.2.2 0.0.0.0

My understanding was that:

Green = source & mask
Red = destination & mask

However this seems to stop all my other hosts on LAN1 from pinging the server also.

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Server 2008 - Share Internet Through DHCP Server

May 6, 2012

[code]...

I am able to obtain IP addresses through the DHCP server for my clients and I am able to browse internet on the server 2k8.Server 2008 - Share Internet through DHCP server

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Mar 3, 2013

I have a 5520 in production at a customer's site between an outside 802.11 network and an inside server.   The server can get to outside hosts OK, and the traffic is being NATed  properly, and sockets initiated by the server on the inside can pass data both ways, but I need to allow outside hosts the ability to send  'announcement' UDP packets to the inside server.  I thought this might be an  outside-NAT-required issue to get the traffic routed, but I need the inside server to see the  actual outside host source IP in the UDP packet, so I basically set the  outside host up similar to the inside host, just without the NAT table on the firewall -- it's subnet is outside the  destination (inside server) subnet, and its gateway is the outside  interface of the ASA, the same way the inside server is able to get to  hosts outside.  The firewall should just route the packet with a destination of the inside subnet once it sees that it hits a 'permit' ACL.
 
I have the appropriate ACL's set up, and when I do 'show access-list' I  see policy hits for the 'permit' statements where the outside host is  generating the announcement and it's hitting the ACL.  I even duplicated  the ACL into list 101 and 102, and applied 101 for inbound traffic on  the outside int, and applied 102 for outbound traffic on the inside int,  and I'm seeing policy hits on both permit statements outside and  inside, so it looks like the traffic is being passed on to the inside  interface and permitted, but the server isn't seeing the packets.
 
I can ping the outside interface from the outside, but cannot ping the  inside interface or any inside hosts from the outside, even though I  have 'permit icmp any any' enabled on the ACL on both ints. When I  remove the firewall and put the outside clients on the same subnet, the server sees the packets just fine.
 
I set up the same scenario in my lab with an ASA 5505, with the same results.  Below is the running config from the 5505 in the lab.  The production firewall is running a slightly older version of ASA, so I made the configuration as basic as possible on the 5505 to match the config in the field:
 
: Saved
:
ASA Version 8.3(1)
!
hostname ciscoasa
enable password Guh9Xxhb9mcC8lV1 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface Vlan2
description Outside WAN Interface
nameif outside
security-level 0
ip address 192.168.10.1 255.255.255.0
!
interface Vlan3
description Inside LAN Interface
nameif inside(code)

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I ran into a very interesting problem that occurred today and I'm trying to figure out why it happened. If it was one ASA 5505 that just required the reboot, then I'd have just chalked it up to a glitch, but when we built a new AD/ DNS server on the main network at the main site and changed the 3 Remote site ASAs to point to the new DNS server in the DHCPD options, none of them could ping any local host names to the DNS server at the main site they were now pointing too, but external host names { URL} all translated and pinged fine.
 
From a laptop on one of the remote sites, we could ping the new AD/DNS server(192.168.0.3) and the old AD/DNS server(192.168.0.2) and everything else at the main site, and telnet to port 53 showed successful across the Easy VPN from the Remote site to the new server at the main site. When wire shark was added to the new DNS server at the main site, the DNS request and replies for {URL}, for example, came and worked fine, but any requests for local resources never made it to the server from the remote sites.
 
A reboot of one of the Remote Site ASA's corrected the issue. Then I rebooted the other two remote site ASAs, and now DNS was working fine for everybody. I had also tried clearing the ARP cache on the ASAs before resorting to rebooting them. I also tried rebooting the laptop thinking the local DNS cache needed cleared before resorting to rebooting the ASAs. I'm struggling to understand why external, public host names made it through and resolved from the remote sites to the new server at the main site, but anything local failed before even reaching the new server(The new DNS server could resolve requests made by computers at the main site, but the remote sites that traverse the Easy VPN from the ASAs failed).  The new AD/DNS server is the only server configured for DNS for all remote site computers.
 
Is any of this making sense? I'm wondering if clearing the x late or local host tables would have corrected it without having to reboot. I'm just trying to grasp the understanding here and figure out what happened.

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1) What is the server requirements ?

2) What is operating system (windows 2008 or VMWare VMware ESX/ESXi Version 4.1 or 5.0)

3) Is their any dedicated appliance from Cisco ?

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The router shows %Error opening tftp://192.168.0.2/router-confg (Timed out) [Failed]
The tftpd log shows 5 repeated attempts at the file write.
 
Connection received from 192.168.0.1 on port 53570 [25/05 11:56:40.922]
Write request for file <router-confg>. Mode octet [25/05 11:56:40.922]
Using local port 61607 [25/05 11:56:40.922]
<router-confg>: rcvd 0 blk, 0 bytes in 3 s. 0 blk resent [25/05 11:56:43.922]
Connection received from 192.168.0.1 on port 53570 [25/05 11:56:43.923]

[Code]...
 
This is also stopping me upgrading the image on the router as I cannot transfer in the other direction either.

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ASA 5510
Ver 8.2(5)
 
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[code]...

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