Cisco Firewall :: ASA 5520 Cannot Block Incoming Traffic

Dec 12, 2012

I was configure 3 interface on ASA1st - managemetn (only for management)2nd - gig0/0 is connected to internet with real IP3rd - gig0/1 is connected to local networkI was configure routed NAT to internet.But I have problem with restriction incomming traffic to inside interface (ifname is inside)but I can connect to ip address of inside interface from other ip. It is wrong and i can't understand where is my mistake.

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Cisco Firewall :: ASA 5520 - Allow Traffic From DMZ To Internet And Block Traffic?

Apr 29, 2012

I have an ASA 5520 with the below config
 
Gi0/0: outside (Internet)
Gi0/1: inside (Internal users)
Gi0/2: DMZ (web servers, ftp, Mail etc..)
 
I have a SMTP relay deployed on the DMZ for mailing. I have also a mail servers installed in the internal lan,
 
I want to allow trafic from dmz to reach internal lan, and i want normally also allow stmp relay from dmz to reach Internet.
 
How can i block trafic from DMZ to reach Internal Lan (instead of smtp) if the to allow trafic from dmz to internet i must put ANY in the policy?
 
For allowing trafic from DMZ to reach Internet, the policy must be DMZ -----> ANY ----->Services., this policy means DMZ can implicity reach Internal Lan?

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Cisco Firewall :: ASA 5520 / Monitor Largest Outgoing And Incoming Traffic Per Ip In Real Time?

Mar 4, 2013

We have a Cisco ASA 5520 and im looking for a way to monitor largest outgoing and incoming traffic per ip in real time so to know which of my internal computers are using the most of our Internet Line. Is there a way to this through ADSM ? We use version 6.3.

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D-Link DIR-600 :: Block Incoming Traffic From An IP?

Aug 20, 2012

I would like to block incoming traffic from a specific ip on a specific port

This is what I have

source: interface: wan ip address range: 5.xxx.xxx.226 - second one is empty (valid ip instead of x's) protocol: tcp

dest: interface: lan ip address range: both fields empty port range: 139 - empty field

ON and DENY box is ticked name field has some text in it

I click save and get this pop-up: Incorrect source ip address. Invalid format of the start IP address. Current Firmware Version : 2.11 The ip is obviously valid, what should I do?

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D-Link DIR-600 :: Block Incoming Traffic / How To Create Rule Source

Jun 23, 2011

I need to block incoming traffic with Dlink DIR 600. I know how to create the rule source (WAN) to destination (LAN)  to deny all protocols. But what IP will I put in WAN? IP address of my Internet? Or how can I enter the ALL IP range in source...format for the IP (it's not 0.0.0.0).

I want to do this because in the DIR log section I'm being PING Flooded.  I already un-check "Enable WAN Ping Response" but still receiving the message.

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Cisco Firewall :: ASA 5520 To Block Https Traffic But Users Are Able To Open Website

Jul 1, 2011

We have ASA 5520 with CSC-SSM 20 and we want to block https traffic but when we are blocking https traffic http traffic going to block but user are able to open website. 

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Cisco Firewall :: ASA5550 Way To Block Incoming Connections From TOR

Nov 29, 2012

I need to block 4000 nodes (Ultrasurf, TOR exit nodes) and I've written a script that will ssh and copy in these objects (prob 100 at a time) into an object group and then put a blanket deny.  I don't see a flood of traffic (occassional hits every other day, etc) but I was wondering what the impact would be?  Can the ASA handle an object group of that size plus an ACL with it?  Any way to block incoming connections from TOR/Ultrasurf?

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Cisco Firewall :: How To Log Incoming Traffic (SMTP) On PIX 515E

Mar 6, 2013

I'm new to ASA's and PIX units. I've setup a few VPN's now but know next to nothing about logging on these units. I read the config guide for the PIX, but cannot figure out how to get a log of incoming SMTP traffic going on the console.Do I need to use a SYSLOG server? I can probably set one up on my laptop.

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Cisco Firewall :: ASA 5505 Not Allowing Incoming Traffic

Mar 15, 2012

I am trying to switch out a cisco pix 501 firewall with a cisco ASA 5505 firewall.  I am not very familiar with all of the commands for the firewalls and have always relied on a standard command line script that I use when building a new one.  Unfortunately, my script is not working with the 5505.  What I am doing wrong with the following script?  I've masked public IP info with xxx.xxx.xxx and I run it right after restoring the firewall to the factory defaults.  I am able to get out to the internet if I browse directly from one of the servers, but cannot access a web page when trying to browse to it from an outside network. [code]

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Cisco Firewall :: ASA 5510 - Find The Receiving End Of Incoming Traffic?

Jul 3, 2012

We run a Cisco ASA 5510 and i need to find out how i can find the receving end on the inside of a vlan for traffic comming from outside.
 
ie incomming traffic on port 3937 and are NAT to eth 0/1.10
 
Thers a bunch of traffic on one port 33771 udp going in on 90.191.72.227 how do i trace this to the inside computer ???
  
lets say incomming traffic is on 90.191.72.227 and this is on eth0/0 this ip is NAT to a Vlan on the side for 10.10.0.0 with a subnet of 255.255.255.0

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Cisco Firewall :: ASA 5510 Stops Forwarding Incoming Traffic To Internal Servers?

Dec 5, 2012

Since the power failure two days ago, my -ASA stops forwarding traffic to internal servers, for no apparent reason. Packet trace shows all OK, packet capture buffer stays empty when I try to http into the mail server. The only way to get it working is to change the Outside Ip to the one used for mail, then to change it back. It will work OK for a few hours, then stop, with nothing obvious in the logs.

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Cisco Firewall :: ASA 5520 Block MSN Messenger

Mar 22, 2011

I am runninng a ASA5520 and ASDM 6.2, I have recenly noticed some MSN traffic on our network. Is there a ASDM policy that I can apply to kill all MSN and Yahoo traffic ? I am looking to block this chat traffic on our network.

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Cisco Firewall :: ASA 5520 - How To Block LAN IP To Use WAN Resources

Nov 12, 2011

I am getting to many teardown tcp connection for outside interface.
 
i want to block this ip using CISCO IPS or using A access-list in ASA 5520 .

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Cisco Firewall :: Block TeamViewer On ASA 5520 8.2?

Jun 25, 2012

I have the below policy-Map in my firewall,according to this policy map how can i block teamvirewer via asa 5520, i don't want the outside users to connect using teamviewer to their servers which is already ready up for teamviewer actions
  
i want to allow only 1 ip address to use team viewer (172.30.30.100)
 
class-map inspection_default
match default-inspection-traffic
!
!

[Code].....

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Way To Block Incoming Calls

Mar 16, 2012

I start to use the CM. I received a request to block a number,I need to block the call only on the Call Manager or also on the Gateway that I have?

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Cisco Firewall :: ASA 5515X - How To Block Traffic Of P2P

Jan 28, 2013

I'm using ASA 5515X my concern is I was not able to block the traffic of P2P such as BitTorrent etc. I was also view some technotes on how to use webfilter without using Websense or Smartfilter tools and lucky I'm able to block certain websites. how to block the traffic of P2P?

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Cisco Firewall :: ASA 5520 / How To Block All Ultrasurf Application

Oct 10, 2012

How can I block Ultrasurf Application?I have configured Cisco ASA 5520 with Cisco CSC-SSM module. I have blocked everything Except Business and banking activities.But user can access A 2 Z traffic  through Ultrasurf.exe application. which bypasses all possible firewalls.How can I blocked this application?

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Cisco Firewall :: ASA 5520 - How To Block Proxy Software

Apr 18, 2011

I have ASA5520 with CSC bundle. How can i block Proxy Softwares like Ultrasurf.....?

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Cisco Firewall :: ASA 5520 - How To Block All Bypasses Application

Apr 29, 2011

How can I block Ultrasurf Application?   

I have configured Cisco ASA 5520 with Cisco CSC-SSM module.
  
I have blocked everything Except Business and banking activities.
 
But user can access A 2 Z traffic  through Ultrasurf.exe application. which bypasses all possible firewalls. 
 
How can I blocked this application?

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Cisco :: Block Internet Traffic On The PC Using ASA5501 Firewall?

Jul 7, 2011

Is it possible to block internet traffic on the PC using ASA5501 firewall which is used in transperent mode.The DHCP pc is working fine we just need to pass through ASA to block the internet on the pc however intranet should be available.

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Cisco Firewall :: ASA 5520 - How To Block Proxy Over Secure Browser

Mar 24, 2011

Having some problems blocking users installing/using secure browsers proxy. Currently runing ASA 5520 ver. 8.3 & IPS SSM-20 7.0 (2) E4 & Websense web filtering. Able to block most proxy sites with Websense that use port 80 but recently found that some users using some products like Njutrino that use their own secure browser that use it's own proxy over SSL connection.

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Cisco Firewall :: ASA5510 / Block HTTPS Traffic In CSC Module?

Dec 15, 2011

I am having an ASA5510 with a CSC-SSM-10 module. I am able to block http traffic through the ASA but cannot block https traffic through it. Need to block https traffic using the CSC module.

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How Does Firewall Block Or Filter Traffic On Specific Port Or IP Address

Nov 15, 2011

How does a firewall block or filter traffic on a specific port or IP address?

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Cisco Firewall :: ASA 5505 / Block Internal LAN And Internet Traffic Except LogMeIn Site?

Sep 12, 2011

I have configure Cisco 5505 as layer 2 firewall mode. I have vendor machine connected  to Cisco ASA 5505 on port 2 as VLAN2 inside then VLAN1 outside connected to my internal network on layer 2 cisco 2960 switch. This machine needs access only to LOGMEIN then block all internal/internet traffic. 
 
vendor machine on vlan 2 inside >> Cisco ASA 5505 vlan1 outside  >> layer2 switch >> internal LAN >> Cisco 5520 main FW >>> INTERNET

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Cisco Firewall :: Access-List Traffic Control Attempting To Block RDP 3389

Nov 7, 2012

I have an ASA pair configured to replace a router that hosts a collection of IPSec Tunnels.  Tunnels appear to work.  I am lab'ing some additional controls that I would like to implement.  On the Production Router that i plan to replace with the ASA's the current Tunnels are all wide open (all traffic allowed to pass).  I was hoping to lock things down a little without having to reconfigure all of the Tunnels.  My though was that an ACL on the Inside Interface blocking selected traffic Out (so into the LAN) should not impact the stability of the Tunnels but allow me to restrict some traffic from entering the LAN.  One port that I was attempting to block is RDP 3389.  When this ACL is applied to the inside interface it does not block Port 3389 at all.  What am I missing?  Is it that the trffic is being allowed because it is coming through one of my 'open' Tunnels? 
 
Shouldn't IPSec Tunnel traffic be processed by the Inside Interface ACL just like all other traffic?
 
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 3389
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 135
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 137
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 138
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 139
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 445
access-list 145 deny   tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 389
access-list 145 permit ip any any
 
ip access-group 145 out interface Internal
 
This work great on a 2821 Router, but not so much on the ASA.

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Cisco Firewall :: ASA 5520 - VPN Traffic Is Getting Dropped Through Firewall

Apr 8, 2011

Our Local Network is behind the CISCO ASA Firewall.Whenever we are accessing to Client VPN server,it is getting connected but after few Minutes (May be 5/10/30 Min),the sessions are terminating. The same traffic through PIX is no issue , only with ASA Firewall. See the following Error and request you give the possible root cause for this.
 
2011-04-09 16:15:09    Local4.Info    172.16.1.68    %ASA-6-302016: Tear down UDP connection 87447908 for OUTSIDE:68.22.26.66/4500 to inside:172.16.9.10/4410 duration 0:27:49 bytes 18653

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Cisco Firewall :: ASA 5520 VPN Tunnel Up But Not Traffic

Nov 1, 2012

We just migrated from a single 5510 to a dual (failover)  5520, It seems that everything is working except the remote VPN. We can establish a tunnel and authenticate as local users, (going to LDAP when all is working) but no traffic is passing. I know I am overlooking something but cant see it. [code]

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Cisco Firewall :: 5520 VPN Traffic Between Interfaces

Jun 12, 2011

Our ASA 5520 firewall is running 8.0(4) IOS.I have an internal L2L VPN terminating on my firewall (from an internal remote site) on ENG interface.With the default "sysopt connection permit-vpn" command enabled, VPN traffic is allowed to bypass the ENG interface acl.The security level on the ENG interface is set at 50.The security level on the destination interface PRODUCTION is set at 40.Inbound VPN traffic bypasses ENG interface acl and since higher-to-lower security level allows VPN traffic to flow freely from ENG to PRODUCTION, it seems the only place to check/filter VPN traffic is an ACL placed on the PRODCTTION interface and set at INBOUND (outbound VPN traffic).

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Cisco Firewall :: Traffic Prioritization On ASA 5520?

Dec 1, 2011

I have a Cisco ASA 5520 (8.0) and I'm trying to figure out how to prioritize traffic to specific websites (by either domain names or IP addresses/ranges).  This document [URL] has some great examples, but I'm not able to create a class-map that will match addresses.  I'm not doing any other traffic manipulation on this ASA. 

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Cisco Firewall :: ASA 5520 - Allow Traffic Between DMZ Servers?

Dec 20, 2011

We can´t reach DMZ servers from other DMZ servers?If I make a ping from DMZ server to another, sometimes only recieve one ping, sometimes 4, sometimes 0.How can I allow the traffic between DMZ servers??
 
(ASA 5520 Version 8.4)

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Cisco Firewall :: 5520 - Traffic From Inside To Outside

Mar 2, 2011

I am setting up a pair of 5520 in A/S mode but the traffic from inside to outside seems blocked somehow.

asa01# sh run : Saved
ASA Version 8.3(1)
host name asa01
enable password LFJ8dTG1HExu/pWQ encrypted
password 2KFQnbNIdI.2KYOU encrypted
names
[code]......

Base on the above configuration, I still cannot ping or HTTP.

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Cisco Firewall :: ASA 5520 8.3 VPN Tunnel Drops Traffic

Aug 23, 2011

We have a 100 Mbps WAN circuit, we have configured an IPsec tunnel between ASA 5520 and Cisco 3845 Router for our DR site replication via Veeam Backup and Replication, it was working fine before, when we established the 3DES tunnel the traffic for certain subnets is dropped after an hour and it stops the replication, although tunnel remains up and we can access the other subnets, as soon as we clear the crypto SA and ISAKMP sessions on the firewall the traffic starts flowing again and then after an hour the traffic is dropped again.So far the testing and differnet configurations we tried are as under.
 
Tried with a different MTU size both on firewall and ESXi servers but nothing happened.Their is no QOS configuration.Checked the utilization on both ends its Noram although their are subsequent 100% spikes on Cisco 3845 but on average it remians at 30-40%.

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Cisco VPN :: 5520 - How Much Traffic Pass Through Into IPSec In ASA Firewall

Mar 20, 2013

How can I see the quantity of traffic that is passing through into an IPSec VPN in a ASA 5520.

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