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Network Analysis

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Solutions

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Contributors

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).

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Hi Guys,

We have an IP block from the ISP
Thus a couple of public IP's assigned, example:
196.31.231.80
196.31.231.81
196.31.231.82

Our NAT policies on 196.31.231.80 over X1 interface is working well.

I've been trying to setup additional NAT policies on 196.31.231.81, but experiencing a connection issue.
Which brings me to the following questions:

1.  Is it necessary to setup a Virtual Interface for 196.31.231.82 on X1?
(255.255.255.0)
Or could the NAT rules simply refer to X1?

2.  I tried setting up a Virtual Interface on X1 for 196.31.231.82, but it complains about the same subnet used,
What should the subnet for the Virtual Interface be?
0
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Hello everyone,
A client of mine is having an issue with their wireless.  They have been reporting that the passwords were getting rejected so I updated the passwords and then the same thing.  I have tried rebooting it, which normally used to fix these issues but now does not.  They have two ssids, one for employees and one for guest and they are configured in a virtual access point.  There are no more firmware upgrades for this model, my next step would normally be to upgrade the firmware.  We have recommended upgrading this Sonicwall as it is no longer supported as well as having a separate access point in the past.  I honestly think that this would be the only solution at this point, but out of good customer service I am reaching out to you guys to see if there is anything else that I can try.
0
An interface on a Cisco switch show Total Output drops is 776, txload 4/255. What does it indicates ? Does it tell something wrong for the cable or the device connecting to the switch ? How to improve this situation ?

Thx

---
GigabitEthernet1/0/14 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 381c.xxxx.xxxx (bia 381c.xxxx.xxxx)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 4/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 776
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 44000 bits/sec, 73 packets/sec
  5 minute output rate 1821000 bits/sec, 152 packets/sec
     3457773 packets input, 964760961 bytes, 0 no buffer
     Received 31107 broadcasts (19813 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 19814 multicast, 0 pause input
     0 input packets with dribble condition detected
     4206341 packets output, 4232934589 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 …
0
I need to add one of our vendors IP's to our Sonicwall so they are not blocked.

How?
0
hi guys,

I'm currently managing an IT Operations team. I've been asked by our new head to come up with a way for me/us to measure in some shape or form their progress on a weekly basis.

We use Zendesk for our ticketing system which is very comprehensive. He wants us to find a way of knowing, how many particular jobs were started, closed, including things such as 'what got in the way?'. Along with that, he wants to know a way of measuring project progress in a similar way.

Do you guys have any measuring methods that you use at your work places? Or advised others on how to better do something similar?

Thanks for helping
Yashy
0
Ping: 34 ms
Download: 16.46 Mbps
Upload: 16.63

Thanks.
0
I currently have a SonicWALL TZ 200 configured with WAN connections on 2 interfaces. I recently purchased a HughesNET satellite connection and I want hook this up to the SonicWALL (And add it to the failover/load balancing). However, once I received the Modem from HughesNET (HT2000) I learned that it does not have a "Bridge" mode built into the router. I cannot disrupt my current Subnet (needs to stay the same). Does anyone know if there a way to configure the interface for the modem/router combo into the SonicWALL so it will work properly?

Thanks in advance.
0
Hi ,

I use syslog server to collect the logs from Ciso devices which includes Cisco VPN. But i get too many events from syslog event id # 419002

I would like to set in my Cisco VPN not to forward the syslog event#419002 to my syslog server, can you help me by letting me know the configuration which i will have to make it at my device end?

Thank you,
0
I have been informed by Spamhaus that the IP address we use for corporate email has communicated with a known spam site and is either infected by, or NATing for, a computer that is infected by the S_Gozi trojan / downloader.

It states that the infection is extremely difficult to detect and is not seen by most commercial AV or EndPoint protection suites.

I have been told to program the Sonic-wall TZ215 to stop all traffic to sites outside the US.  We have never done this before.  Not sure how to setup the sonic-wall for that purpose.  I know this virus does not use the standard port 25 for smtp traffic it uses port 80 which i cannot block.  It is extremely difficult to find so i am trying to stop its connections at the firewall level to stop it communicating.  Any help would be greatly appreciated.
0
Hello Experts,
I just installed sonicwall tz400w and everthing is going well except printer. Printer disconnect automatically after few minutes. I have to connect them manually again and again. I am using commercial printer by konica minolta and i use fiery app on Konica. Its working fine without the firewall.  Please help
0
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Hi just using IMC on a trial basis

How exactly does it help with vlan management and ACL management can anyone outline ways in which it help us support switches is it just useful in terms of deployment etc

Any good learning material available?
0
First timer here with a Sonicwall Soho wireless. I want to integrate it into a network where currently Verizon FIOS is providing Internet connectivity to one Server and three Windows 10 Pro workstations. Server is the only DC.

I'm almost certain the Verizon router's IP is dynamic, but will check when onsite.

I am thinking that the Sonicwall appliance should be set up physically where I run a CAT5 from the Verizon Router's LAN port to the WAN port on the Sonicwall, and then from the Sonicwall's LAN port to the switch.

Is this correct implementation? Any insight would be greatly appreciated.

Verizon Actiontech RouterMI424WR
Sonicwall SOhO Wireless-N
DellServer 2008 set up as DC
3 Windows 10 Workstations
0
Hi all,

We look after a number of small business networks and from time to time we have reports of network connectivity issues. Recently we have a network that is randomly stopping and starting internet access on a handful of PC's that are not patched into the same switch.  We have found however that removing one switch in particular seems to fix the issue so we think that's the cause. It does make me think however that we could use a very easy to use network diagnosis tool, be it hardware or software to help with this sort of thing.  As we are not advanced network engineers we'd like something reasonably easy to use and translate the findings. Any recommendations? Thanks
0
Hi  all, please help me on this.
in the palo alto monitoring I see the ip is allowed by policy but the session end reason showing" tcp-rst-fromclient" means pls advice me this is the issue causing due to firewall denying or dropping traffic or issue on the client end.
0
So I have an old sonicwall I am replacing with a fortigate.  The PC's have 7 day DHCP leases... The Fortigate will be set up to be the same IP as the sonicwall was and it will have the same DHCP range... But of course when I make the swap the fortigates lease list will be empty... Im curious - as PC's check in with the firewall, will they keep their addresses?  Or will they wind up getting reset the lowest available address at the time?

Any other concerns to think about with swapping the firewalls?  

Thanks!
0
I have the following config but however I cannot display any internet pages from a client machine and or ping from a client machine. All pings from the cisco router works and I get a reply however from the client it fails





 

ip access-list standard RFC1918-dns
 permit 10.23.72.0.255.255.255

 

ip dns name-list 1 permit .*
 

ip dns view default
 domain name-server 71.242.0.12
 domain name-server 71.242.0.13
 domain name SOMECOMPANY.LAN
 dns forwarding source-interface GigabitEthernet0/0


ip dns view-list LAN
 view default 1
  restrict source access-group RFC1918-dns
  restrict name-group 1
 

ip dns server view-group LAN
ip dns server


Pinging yahoo.com [98.138.252.38] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 98.138.252.38:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Users\ping foxnews.com

Pinging foxnews.com [104.92.16.8] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 104.92.16.8:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
0
Hi there,
For some reason I cannot ping external IP addresses from my router cisco 2911.  Any device behind my router 2911 is perfectly fine and can ping, its only the router which cannot.  Need help in identifying where the fault is.  I forgot if I used to ping external address from my router or not as the devices behind it have no issue, some change at the ISP end might have occurred.  I have also contacted ISP according to them it is the internal issue.  
Here is the sample of ping from this router:
EXternal pings:
**********************************************
MyRouter_2911#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
*********************************************
Internal pings from this router:
********************************************
MyRouter_2911#ping 10.10.10.11
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.11, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
**************************************************
Show ver:
************************************************
System image file is "flash:/c2900-universalk9-mz.SPA.152-4.M9.bin"
Last reload type: Normal Reload
Last reload reason: Reload Command



This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco…
0
I have been using SonicWall for years. Never really thrilled with their support (primarily a language barrier until recently) but their content filtering seems to be problematic. I spend more time on the phone with them trying to keep it running correctly than it is worth.

Does anyone else use SonicWall for content filtering and in your opinion is it easy to keep running? Any comments about sonic wall in general?
0
Hello All,

I found "IPsec (ESP) packet dropped" events in attempts section in Sonicwall GMS.
Can anyone help me to resolve this issue.

Thanks
Yogiraj Pattani
0
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I have an outside vendor that needs to communicate to their equipment on our inside network. I would like to set up a DMZ for that access. I have 5 public IP addresses to use. The ASA i want to set up is strictly for this use and no other. I have four devices on the inside that will have static IPs which will require certain ports to be opened. This is what they require. I do not have a config to post as of yet. I am trying to configure one.

Four static private IPs
External port forwarded to internals
  Port 90 Open - 1st internal IP
  Port 91 Open  - 2nd internal IP
  Port 2048 Open - 2nd internal IP
  Port 92 Open - 3rd internal IP
  Port forward 2049 to 2048
  Port 93 Open - 4th internal IP
  Port forward 2050 to 2048

Any suggestions would be greatly appreciated.
0
Dear All,
I am not able to see anything after login Forti Gate 60 C . "internal server error"
IP sec vpn also dwon how i solve this problem.
0
Our company are using Palo Alto Firewall ,we received the critical alert "Top 5 attackers" and the source is from one of the application server. What does it mean and what should I do .Please advice.Thanks
0
We have users that don't have static IPs and need them to gain access to some servers. They do have DDNS with nutpile so wondering if those dns names could be used instead of a source IP.
0
Hi Experts,
I have a Sophos Firewall and want to use at home. I got some Information that if i use it at home then i Need Home-use license.
how can i get homelicense for it? I look at Sophos web site but i did not understand how is?

Thank you so much and Regards
0
I have several colleagues complaining that when they are on VPN - when they download something - the download stop in around 75mb.  It then gives a network error.  Users can resume the download - but again causing issues.

Is there a setting in Dell Sonicwall restricting this?

Pretty sure there is no GPO setup
0

Network Analysis

9K

Solutions

12K

Contributors

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).