# Network Services **URL:** https://forum.networklessons.com/c/routing-switching/network-services/22.md [Latest](https://forum.networklessons.com/latest.md) · [Categories](https://forum.networklessons.com/categories.md) --- ## [About the Network Services category](https://forum.networklessons.com/t/about-the-network-services-category/28)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [December 13, 2016, 12:33pm UTC](https://forum.networklessons.com/t/about-the-network-services-category/28 "2016-12-13T12:33:23Z")
Network services are those protocols/topics that don’t belong somewhere else…think about DHCP, NAT, VRRP/HSRP/GLBP and more. --- ## [Ip nat inside destination](https://forum.networklessons.com/t/ip-nat-inside-destination/52680)
**Author:** [@reiniko](https://forum.networklessons.com/u/reiniko)\ **Replies:** 2\ **Last updated:** [October 12, 2024, 10:08am UTC](https://forum.networklessons.com/t/ip-nat-inside-destination/52680 "2024-10-12T10:08:30Z")
Hi, many thanks for the good explantions in your lessons, I found it multiple times very helpful! I’m looking for a good and detailed description for this feature, but I couldn’t found anything here in networklesson… --- ## [NAT + access-list level](https://forum.networklessons.com/t/nat-access-list-level/39258)
**Author:** [@barakat\_alhamzi](https://forum.networklessons.com/u/barakat_alhamzi)\ **Replies:** 1\ **Last updated:** [September 7, 2023, 4:39am UTC](https://forum.networklessons.com/t/nat-access-list-level/39258 "2023-09-07T04:39:04Z")
Hello all i want to know if i am on right or no , as i think access-list subjects only in ccna level ?? means nothing about them in ccnp & ccie so anyone read ccna should be sure 100% understand this subject because w… --- ## [Using ip helper-address on a nat inside interface](https://forum.networklessons.com/t/using-ip-helper-address-on-a-nat-inside-interface/26656)
**Author:** [@mdella](https://forum.networklessons.com/u/mdella)\ **Replies:** 1\ **Last updated:** [May 10, 2022, 2:47pm UTC](https://forum.networklessons.com/t/using-ip-helper-address-on-a-nat-inside-interface/26656 "2022-05-10T14:47:14Z")
So I have a few routers that I can no longer afford to put “real” addresses and I would rather use the 100.64.0.0/12 space (this is for NAT444). But for some reason, the router is sending to our DHCP server the nat insid… --- ## [How simulate network wi-fi traffic?](https://forum.networklessons.com/t/how-simulate-network-wi-fi-traffic/23841)
**Author:** [@u.forte](https://forum.networklessons.com/u/u.forte)\ **Replies:** 1\ **Last updated:** [February 19, 2022, 6:44am UTC](https://forum.networklessons.com/t/how-simulate-network-wi-fi-traffic/23841 "2022-02-19T06:44:31Z")
Hi I want know if there is a product that emulate user traffic WI-FI ? i want to try on my customer user traffic wi-fi example emulate 100 user connectivity wi-fi thanks --- ## [DNS Queries](https://forum.networklessons.com/t/dns-queries/15723)
**Author:** [@pvrvikramrahul](https://forum.networklessons.com/u/pvrvikramrahul)\ **Replies:** 1\ **Last updated:** [November 10, 2021, 6:40am UTC](https://forum.networklessons.com/t/dns-queries/15723 "2021-11-10T06:40:01Z")
Hi Team, Good Day!!! I have some queries related to DNS concepts. 1.When we buy a domain name the registrar updates the delegation zone for the domain which is basically the Nameserver Record of the domain. I would li… --- ## [Wireshark packet capture vs EPC](https://forum.networklessons.com/t/wireshark-packet-capture-vs-epc/14322)
**Author:** [@edelmann.lukas](https://forum.networklessons.com/u/edelmann.lukas)\ **Replies:** 2\ **Last updated:** [June 25, 2021, 11:49am UTC](https://forum.networklessons.com/t/wireshark-packet-capture-vs-epc/14322 "2021-06-25T11:49:59Z")
Hi, what is the difference between Wireshark packet capture and EPC (Embedded Packet Capture)? For me it seems to be the same, but they have 2 different topics in the documentation. --- ## [Gateway Mac spoofing prevention (no ip source guard /dynamic arp inspection)](https://forum.networklessons.com/t/gateway-mac-spoofing-prevention-no-ip-source-guard-dynamic-arp-inspection/14302)
**Author:** [@dnv21](https://forum.networklessons.com/u/dnv21)\ **Replies:** 1\ **Last updated:** [May 10, 2021, 5:46am UTC](https://forum.networklessons.com/t/gateway-mac-spoofing-prevention-no-ip-source-guard-dynamic-arp-inspection/14302 "2021-05-10T05:46:49Z")
In enterprise switch networks which is usually structured with access ,distribution and core i find that sometimes access /distribution layer gets spoofed with gateway mac address . At these layers since ip address … --- ## [Cisco ISR Box-to-Box High-Availability](https://forum.networklessons.com/t/cisco-isr-box-to-box-high-availability/14004)
**Author:** [@nileshupatel](https://forum.networklessons.com/u/nileshupatel)\ **Replies:** 1\ **Last updated:** [April 2, 2021, 4:57am UTC](https://forum.networklessons.com/t/cisco-isr-box-to-box-high-availability/14004 "2021-04-02T04:57:16Z")
Hi Rene , If possible , please provide information/lesson about NAT box-to-box high-availability support and describes how to configure . --- ## [Vpn latency](https://forum.networklessons.com/t/vpn-latency/12178)
**Author:** [@Giovanni](https://forum.networklessons.com/u/Giovanni)\ **Replies:** 1\ **Last updated:** [September 2, 2020, 6:12am UTC](https://forum.networklessons.com/t/vpn-latency/12178 "2020-09-02T06:12:51Z")
Hi, Can you help me to understand this behavor. I have one server with openvpn client installed e connected to the openvpn server in HQ in another location. Everything works, but when I try to reach the remote … --- ## [Raspberry Pi - SLA Responder](https://forum.networklessons.com/t/raspberry-pi-sla-responder/12081)
**Author:** [@skygremlin](https://forum.networklessons.com/u/skygremlin)\ **Replies:** 2\ **Last updated:** [August 21, 2020, 3:42pm UTC](https://forum.networklessons.com/t/raspberry-pi-sla-responder/12081 "2020-08-21T15:42:06Z")
Has anyone used a Raspberry Pi for an SLA Responder? Can that be done? Thank you --- ## [Remote Access VPN](https://forum.networklessons.com/t/remote-access-vpn/11078)
**Author:** [@vishaul](https://forum.networklessons.com/u/vishaul)\ **Replies:** 0\ **Last updated:** [May 5, 2020, 8:59pm UTC](https://forum.networklessons.com/t/remote-access-vpn/11078 "2020-05-05T20:59:56Z")
Hi, I have an accessabilty issue with a remote access VPN connection. The remote access user can http and ftp to the Web server & FTP server, but when the remote access user connects to the VPN on the router at 72.44.20… --- ## [Vpn router](https://forum.networklessons.com/t/vpn-router/10503)
**Author:** [@jmarkh68](https://forum.networklessons.com/u/jmarkh68)\ **Replies:** 0\ **Last updated:** [March 31, 2020, 7:46pm UTC](https://forum.networklessons.com/t/vpn-router/10503 "2020-03-31T19:46:23Z")
We have a remote warehouse. We want to put a vpn router at the warehouse. I have a couple questions Does the vpn router require a site to site connection, or can a different type of VPN be used. Would the main office… --- ## [Ip nat outside command not available](https://forum.networklessons.com/t/ip-nat-outside-command-not-available/9081)
**Author:** [@andy.kronenberger](https://forum.networklessons.com/u/andy.kronenberger)\ **Replies:** 0\ **Last updated:** [December 4, 2019, 7:55pm UTC](https://forum.networklessons.com/t/ip-nat-outside-command-not-available/9081 "2019-12-04T19:55:35Z")
Hello there, just joined the community and already struggling with a lesson :slight\_smile: I cannot configure ip nat commands on a physical interface of a C3560 multilayer switch. I can configure it on a vlan interface… --- ## [Why is 10.1.255.255 an invalid broadcast address?](https://forum.networklessons.com/t/why-is-10-1-255-255-an-invalid-broadcast-address/8500)
**Author:** [@kingbilalbaroudi](https://forum.networklessons.com/u/kingbilalbaroudi)\ **Replies:** 3\ **Last updated:** [October 10, 2019, 9:08am UTC](https://forum.networklessons.com/t/why-is-10-1-255-255-an-invalid-broadcast-address/8500 "2019-10-10T09:08:58Z")
I’m not sure if this is the right place to post this. I’ve been following the CCENT official certification book(100-105) and came upon this question in the “do I know this already?” quiz. The books only covered /24 subn… --- ## [Ldp uses 646 udp for adjacency and tcp 646 for session creation. Would you please elaborate](https://forum.networklessons.com/t/ldp-uses-646-udp-for-adjacency-and-tcp-646-for-session-creation-would-you-please-elaborate/5342)
**Author:** [@anildthakur](https://forum.networklessons.com/u/anildthakur)\ **Replies:** 0\ **Last updated:** [October 31, 2018, 7:49am UTC](https://forum.networklessons.com/t/ldp-uses-646-udp-for-adjacency-and-tcp-646-for-session-creation-would-you-please-elaborate/5342 "2018-10-31T07:49:57Z")
ldp uses 646 udp for adjacency and tcp 646 for session creation. Would you pleases elaborate. --- ## [How to Hook-up a netgear to a Cisco 1841 router for internet](https://forum.networklessons.com/t/how-to-hook-up-a-netgear-to-a-cisco-1841-router-for-internet/685)
**Author:** [@praneeth501](https://forum.networklessons.com/u/praneeth501)\ **Replies:** 3\ **Last updated:** [October 27, 2018, 12:08pm UTC](https://forum.networklessons.com/t/how-to-hook-up-a-netgear-to-a-cisco-1841-router-for-internet/685 "2018-10-27T12:08:13Z")
I’m new to networking. I’m using a NetGear wireless router in my home for internet access. i recently bought a Cisco 1841 router which has 1 serial port(T-1 CSU/DSU) and 2 Fast ethernet ports. I’m using a ethernet cable … --- ## [NTP based DOS attacks](https://forum.networklessons.com/t/ntp-based-dos-attacks/4534)
**Author:** [@vlagrott](https://forum.networklessons.com/u/vlagrott)\ **Replies:** 1\ **Last updated:** [August 15, 2018, 11:23am UTC](https://forum.networklessons.com/t/ntp-based-dos-attacks/4534 "2018-08-15T11:23:43Z")
Hi, I have a 3560CX switch running the latest firmware. Prior to the latest, the switch ran into a vulnerability where it says NTP Mode Control 6 (It’s set my default) need to be changed to ‘no ntp allow mode control’. … --- ## [How to Configure PAT so that the Web server is accessible on the external IP of the router on port 80?](https://forum.networklessons.com/t/how-to-configure-pat-so-that-the-web-server-is-accessible-on-the-external-ip-of-the-router-on-port-80/4087)
**Author:** [@nshatish](https://forum.networklessons.com/u/nshatish)\ **Replies:** 1\ **Last updated:** [June 15, 2018, 10:43pm UTC](https://forum.networklessons.com/t/how-to-configure-pat-so-that-the-web-server-is-accessible-on-the-external-ip-of-the-router-on-port-80/4087 "2018-06-15T22:43:51Z")
Webserver on the internal network: 10.2.3.34:8080 External IP: 10.2.255.40:80 --- ## [How to find out basic network flow for particular application](https://forum.networklessons.com/t/how-to-find-out-basic-network-flow-for-particular-application/3348)
**Author:** [@networkc2c](https://forum.networklessons.com/u/networkc2c)\ **Replies:** 1\ **Last updated:** [April 3, 2018, 2:45pm UTC](https://forum.networklessons.com/t/how-to-find-out-basic-network-flow-for-particular-application/3348 "2018-04-03T14:45:01Z")
Hi Rene, I would like to know, If I want to find out network flow for particular application, ex. I have one HTTP web application installed inside in one of our server, Than if I wanna know network flow of this applicat… --- ## [SNMP V3 Configuration Based on Criteria](https://forum.networklessons.com/t/snmp-v3-configuration-based-on-criteria/2855)
**Author:** [@kielmmartin](https://forum.networklessons.com/u/kielmmartin)\ **Replies:** 1\ **Last updated:** [February 10, 2018, 11:11am UTC](https://forum.networklessons.com/t/snmp-v3-configuration-based-on-criteria/2855 "2018-02-10T11:11:12Z")
First of all, I am new to this forum and I apologize in advance if I am misunderstanding what this forum is about. I was ask to deploy SNMPv3 which I have never touch before. So after several hours of research, I came up… --- ## [Restricted SNMP](https://forum.networklessons.com/t/restricted-snmp/1993)
**Author:** [@sivak80nayan](https://forum.networklessons.com/u/sivak80nayan)\ **Replies:** 1\ **Last updated:** [August 3, 2017, 10:13am UTC](https://forum.networklessons.com/t/restricted-snmp/1993 "2017-08-03T10:13:03Z")
I have a requirement to configure restricted SNMP for the community string, which means when configure router using SNMP v2, will give access for only interface stats not CPU related information for particular community … --- ## [10/40G Cables / Interfaces](https://forum.networklessons.com/t/10-40g-cables-interfaces/1925)
**Author:** [@Mdgajjar](https://forum.networklessons.com/u/Mdgajjar)\ **Replies:** 1\ **Last updated:** [July 17, 2017, 10:03am UTC](https://forum.networklessons.com/t/10-40g-cables-interfaces/1925 "2017-07-17T10:03:41Z")
Dear tech, I would like to request you to pls share some notes on 10g and 40g ports types and cable used. -mehul. --- ## [NAT pool and outside interface](https://forum.networklessons.com/t/nat-pool-and-outside-interface/766)
**Author:** [@jelanimanzili](https://forum.networklessons.com/u/jelanimanzili)\ **Replies:** 1\ **Last updated:** [January 8, 2017, 9:45am UTC](https://forum.networklessons.com/t/nat-pool-and-outside-interface/766 "2017-01-08T09:45:06Z")
When working with NAT, does the IP Address on my outside interface have to be part of the same subnet for my range of NAT pool IP Addresses? Or, can I have a configuration such as the following: int s0/0/0 ip address 2… --- ## [IPsec Overlaps network with nat overload to internet](https://forum.networklessons.com/t/ipsec-overlaps-network-with-nat-overload-to-internet/793)
**Author:** [@stlourenco](https://forum.networklessons.com/u/stlourenco)\ **Replies:** 2\ **Last updated:** [December 23, 2016, 3:13pm UTC](https://forum.networklessons.com/t/ipsec-overlaps-network-with-nat-overload-to-internet/793 "2016-12-23T15:13:29Z")
Hello, Guys.. I have a doubt regarding a scenario that I built in the Unet Lab. The image I have 2 Sites in a company: the LAN site 1 is 192.168.0.0/24 and the LAN 2 site is 192.168.0.0/16. I can successfully establ… --- ## [NAT Exclude VPN traffic](https://forum.networklessons.com/t/nat-exclude-vpn-traffic/591)
**Author:** [@ramy\_ramy1033](https://forum.networklessons.com/u/ramy_ramy1033)\ **Replies:** 1\ **Last updated:** [January 25, 2016, 8:08pm UTC](https://forum.networklessons.com/t/nat-exclude-vpn-traffic/591 "2016-01-25T20:08:17Z")
how to configure this option When your router is also configured for NAT, don’t forget to configure your access-list so your VPN traffic is not translated when it leaves the router. --- ## [Best Practice to place proxy server in the network](https://forum.networklessons.com/t/best-practice-to-place-proxy-server-in-the-network/553)
**Author:** [@singhronie](https://forum.networklessons.com/u/singhronie)\ **Replies:** 5\ **Last updated:** [December 14, 2015, 8:06pm UTC](https://forum.networklessons.com/t/best-practice-to-place-proxy-server-in-the-network/553 "2015-12-14T20:06:26Z")
Dear Rene & all, I would like to know what is the best practice to place the proxy server in the network. I am having difficulties to decide where to place the proxy server (Kerio Control). My current design is as atta…