I Have web server (linux) sits in the DMZ (asa 5520) segment and this server should be accessible form the internet,
1)how to make this server https based access over SSL
2)how to protect this server form network and security standpoint?
I have ASA 5520 installed. I want to use ntp server for firewall clock setting. I found one open-access ntp server (stratum 2) in Los Angeles:
[URL] 209.151.225.100
Can I use the following command to set ntp server?
ntp server 209.151.225.100 source outside.
How can I access my webserver (on my private LAN) from the internet? INTERNET------------(53.X.X.1 )ASA(192.X.X.X)DMZ-----------(192.X.X.80)HTTP SERVER. I can ping my public address on the ASA outside interface 53.X.X.1 form the internet, but I'm not sure how to do this. I tried to NAT, but I'm failing.
View 3 Replies View RelatedI would like to set up "IP SLA" between L3 switch(supports many "IP SLA" versions like "UDP Echo Operation", "TCP Connect Operation", "UDP Based VoIP Operation", "ICMP Echo Operation", "FTP Operation" etc) and GNU/Linux server. Are there any "IP SLA" test types which are supported only between two Cisco devices?
View 1 Replies View RelatedI have a lot of reading to go through but so far everything I have found is for web server clustering.
View 10 Replies View Relatedcurrently my firewall is Microsoft ISA Server 2006 and im using it very nicely but based on some security treats im changing my firewall from isa to ASA 5520 but im facing a problem that my i had installed on software name Soft Perfect Bandwdith Manager and i was limiting each users based on their MAC address to prevent using of full bandwidth in my internet so thats why i had a very relialble internet useage in my network.
after many search and searching i didnt find a good software or hardware that should support with Cisco ASA Apliances to support bandwidth management for endpoint users and etc and this is very troubel i dont want all users to use full badnwidth in my company becouse i have only 2MB internet badnwith taken via VSAT connection
I have the following setup
|| Socks Server || >> Switch1 >> ||Cisco 5520 ASA || -->> | Switch 2| -->> Clients
I have a SSH SOCKS tunnel set up on the socks server which is a Linux box. When I connect my machine to the switch 2, I am NOT able to receive and mail by setting up a mail client and it seems SOCKS traffic does not reach the socks server. I can however run a telnet command on port 1080 (socks port) which connects which shows that the port was going through and open. However there was no SOCKS traffic. When I connected the machine to Switch 1, SOCKS traffic worked as expected and I was able to receive mail.
This suggests to me that the ASA has some inherent rule that does not allow SOCKS traffic. IS this true and if so how can I bypass this?
My Linux Server Network cuts-out after 10 mins. It says its still connected but when i try to ping google or my laptops IP it gets a 100% loss. Also when i try accessing it via SSH/Putty for Widows 7 it wont connect.
View 4 Replies View RelatedI 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.
View 9 Replies View RelatedWe have a Cisco ASA 5520
We are attempting to setup RRAS on Windows 2008R2 using L2TP. Server is on the inside of the network at 10.10.10.20 our ASA is 10.10.10.1 its outside interface is 68.0.0.0.3/28.
I set a static NAT rule to allow all traffic pointed at 68.0.0.4 to be directed to 10.10.10.20 and have ACLs allowing the following.
esp, ah, udp/500, udp/4500, udp/1701
Mac Clients have no issues with but windows clients seem to hang and never connect. I know the ASA configuration is somehow to blame, if I attempt to connect to LAN IP (10.10.10.20) from withn the same network every thing works fine (making sure all the Windows Issues are covered).We have 2 other IPSEC tunnels established to teh ASA from our COLO and a Satalite office, not sure if this makes it any harder.
I have an ASA 5520 with a DMZ with private addresses that I SNAT to my outside network. From inside the DMZ I can reach servers by both the internal private IP and the public IP, except if the IP is from the server trying to connect. So, say I have server1 and server2. I can connect from server1 to server 2 with both public and private, but can't connect from server1 to server1' using the public IP. ASA logs show that packets are being denied due to land attack. DNS doctoring is not an option for me.
View 1 Replies View Relatedi have user connected to office using Cisco vpn client , Cisco asa 5520 acts as vpn gateway, frequently the users got disconnected from the server while the VPN still established and not disconnected!
what is the cause of the issue , where the fault is located ? how to start the troubleshooting to figure out the issue?
the linux server should be configured with LDAP, so that any user should not login into that machine by local user credentials but by his intranet credentials.
View 1 Replies View RelatedIs there a simple way to have a web server have both a static public ip (I have a block of static IP's) and an static private ip (ex 192.168.0.60)? I am running a web project management application....
View 4 Replies View RelatedI 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)
The router I am using is the Linksys X2000 wireless-N ROuter with ADSL2+ Modem. How to give my linux server a static Ip adress. I've googled it and I don't understand how they are telling me to set it up in the router.
View 3 Replies View RelatedI'm trying to connect Switch 3560 to NTP Server based on Linux, the NTP is working fine but the switch is sync with the Server:
address ref clock st when poll reach delay offset disp
*~10.0.0.70 208.53.158.34 3 42 64 377 1.7 -2.49 0.1
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
Clock is synchronized, stratum 4, reference is 10.0.0.70
nominal freq is 119.2092 Hz, actual freq is 119.2093 Hz, precision is 2**18
[code].....
But server has on time and the Switch another. I test this NTP with CUCM and is working fine, the issue is with ther server?
I am using ASA5520 with webvpn for file sharing. But recently we just upgraded the OS that accommodate file shared folder from win2003 R2 32bit to windows server 2008 R2 64bit. Now I have a problem with accessing file share by ASA webvpn, it appears error contacting host, we have tested the file shared of webvpn on the other OS windows 2003 and windows 2008, they are working on these OS except win2008 R2. Current the ASA OS version is 8.0(2). And the windows firewall has been disabed.
View 3 Replies View RelatedModel : TL-WDR4300
Hardware Version : V1
Firmware Version :
ISP :
I'm can't connect to the router print server using my Linux OS (tested on Ubuntu and openSUSE). I'm try connect by using upnp at port 1900. There are no official (native) application and any tech specification, that I'm can use. how to connect to the print server. Under Windows print server works correctly.
(Setup routing and iptables for new VPN connection to redirect **only** ports 80 and 443) Only my goal is a bit different. I am running a headless gui-less install of Ubuntu Server 12.04 that is being used for a variety of different purposes... I would like all traffic to travel un-prohibited through my ISP except for my transmission traffic. I have a VPN i subscribe to that allows me access for which I only want to direct a single port's traffic to. I am currently using a modified version of the code from the above link. My current code is below:
#!/bin/sh
sleep 200
DEV1=eth0
[Code].....
We run a 6500 with an FWSM with multiple security contexts as well as cascading contexts with a "shared V LAN" . There is a problem with regards to Linux machines and our shared network.
For example, we have three Linux machines in production, each in three separate V LAN's. For me to communicate to these boxes from one V LAN to another I must first ping the server. If I do not ping the server it will not bring up a connection like ssh or HTTP, etc. Below is the error I get from the FWSM that hosts the Linux server, but like I said once I ping the server the error goes away. We only have this problem with Linux machines, and it is a problem for all three of them. Is the FWSM having issues understanding something with all three Linux boxes? Below is the error I get at first, when I try to SSH from one V LAN to another V LAN with the Linux machine.
6 Dec 21 2012 16:33:54 106015 10.255.12.109 22 10.255.1.30 63000
Deny TCP (no connection) from 10.255.12.109/22 to 10.255.1.30/63000 flags SYN ACK on interface inside.
Below is what happens when I initiate a ping to the Linux Server and then ssh again. Notice it builds the connection with no problem after the ping. During the ping it builds the dynamic translation, and then when I ssh it builds the TCP connection. Do you know why this could be?
6 Dec 21 2012 16:35:08 305009 10.255.12.109 10.255.12.109
[Code]....
I was able to connect to my ASA 5510 with a browser, install ASDM, and configure my ASA 5510 with my Windows 7 laptop. Since I needed the laptop for another task, I am now trying to connect using a Linux laptop to do the same, but without success.
I can ssh into the firewall using the management port (192.168.1.1) from the Linux command line. However, I cannot connect using a browswer (192.168.1.1) to install ASDM.
I have decided build an open source firewall in linux environment. I have exactly one year to complete this project. The firewall will be a stateful packet filtering firewall working at network, transport and application layers. I would also be provided log analysis features. What I want to know is whether this is a good enough project or put in other words, is it a worthwhile project to undertake?
View 13 Replies View RelatedOk, so what I want to do is make a router/firewall/proxy (maybe add webserver/FTP as well). Just to start off I want to say that I have moderate knowledge of Linux, enough to administer it from the CL. I have setup routers before but it was years ago and I've forgotten some of the details involved. What I do is a base LAMP install, with DNS, Samba, DHCP server, OpenSSH and then Webmin for easier administration. I've also installed EHCP (easy hosting control panel) in the past but have not at this point.
So, what I want to know is how do I setup the NIC's in the etc/network/interfaces file. Let's say that eth0 connects to the modem and eth1 & 2 are internal adapters. Currently my network is running a Linksys WRT54GL with DD-WRT and the router is set to DHCP for the WAN connection and DHCP is running on the internal network as well. The modem is at 192.168.254.254 and is giving the router an address of 192.168.254.1 my internal network is 192.168.1.1 (192.168.1.0/24). I would like to setup my internal router address to 192.168.1.1 so I guess I need to set it to static in my interfaces config and then set my eth0 to dhcp. Does this sound correct?
So if I do the above my only question is how do I setup the routing tables after that? I always get messed up when I need to make the switch from my Linksys router to my Linux box. I'm not worried about firewall rules at first I can change those once I have the router up and running. I just don't know if I need to make some kind of bridge to bridge the eth0 and eth1 (external NIC and internal NIC).
We were using ASA-5520-K9 with ASA-SSM-AIP-20-K9 but recently found some hardware problem in our running ASA. Now cisco want to replace with ASA-5520-K8.
View 1 Replies View RelatedI'd like to see some REAL LIFE comparisons of ASA firewall throughput (a bit like this one for ISR G2 Routers - [URL].
The reason I ask is that I recently upgraded a firewall from an ASA5505 to an ASA5520 on a small network where the only outside connectivity was a single 10meg Internet circuit with an IPSEC VPN (not landed on the firewall but on a router) to another site.
When I swapped out the firewall the users noticed a big improvement. The firewall is not doing anything out of the ordinary - no IPS or VPN, just standard state full inspection.
I have an asa 5520. How would I configure my dedicated management interface to be able to route off subnet while the firewall is in transparent mode?
View 1 Replies View RelatedWe are using the newest release of AD Agent (1.0.0.32.1, built 598). The ASA Firewalls 5520 are having the software release 8.4(3)8 installed.When somebody tries to connect thru the Identity based firewalls from a citrix published desktop environment (PDI) the connection is not possible. Checking the ip-of-user mapping on the firewalls (show user-identity ip-of-user USERNAME) mostly doesn't show the mapping of the USERNAME and the PDI the user is logged in. The user-of-ip mapping of the PDIs IP-address shows mostly other users, which then are used to authenticate the acces thru the firewalls.
What is interesting, that on the AD Agent using "adacfg.exe cache list | find /i "USERNAME"" i can't see the PDIs IP-address neither because it is mapped to another user.Is Citrix Published Desktop environment supported to connect thru Identity based Firewalls? How AD Agent, Domain Controllers and Firewalls are working together? On the firewalls with "show user-identity ad-agent we see, the following:
-Authentication Port: udp/1645
-Accounting Port: udp/1646
-ASA Listening Port: udp/3799
Why Cisco does use 1645 and 1646 and not 1812 and 1813?The Listening Port is used for what purpose? we tried the AD Agent modes full- download and on-demand with the same effect.
I try to launch a LAND Attack against my firewall ASA 5520. Everything will work fine. But why, I think it should not work. I use a little tool where I can user a spoofed address, with a cluster shell and attack the firewall interface with the source of 127.0.0.1 ore the ip address of the interface as the source and destination. Then I get a cpu load of 89% with only two host. With IP tables I can use kernel processes to prevent this. But I don´t find anything for ASA.
View 1 Replies View RelatedTwo different WAN links get connected to the firewall via two routers.(Different ip subnets).I need to get this two wan streams seperatly to the core switches.Core switches sits.Active/Stanby senario. If the Active core goes down Stndby Core will have take over the traffic. My design is correct ,if not what do i need to change. ASA is 5520.
View 8 Replies View Relatedcommunication between 2 vlans.i have 2 vlans
Vlan 100
ip add 1.1.1.1
!
!
!
Vlan 200
ip add 2.2.2.2
i want to make communication between 2 vlans on firewall 5520 ASA 8.2.
I need to configure my ASA 5520 version 7.3 firewall to translate our SMTP server residing in local LAN to use different IP address from the outside interface which is used by all other computers to access Internet. Under NAT section, I have NATted this internal SMTP server with different IP address(eg x.x.x.1) and also translated the remaining IP addresses in the LAN to the outside interface(eg x.x.x.2)
my problem is, Whenever i check the header for message coming from the smtp server it shows that, the SMTP server is also translated by using the same outside interface public ip address(i.e x.x.x.2) which is used by other client machine to access internet instead of the x.x.x.1. How I can get my SMTP server to use separate IP and avoid to be blacklisted by some domain.
I need to configure my ASA 5520 version 7.3 firewall to translate our SMTP server residing in local LAN to use different IP address from the outside interface which is used by all other computers to access Internet.
Under NAT section, i have NATted this internal SMTP server with different IP address(eg x.x.x.1) and also translated the remaining IP addresses in the LAN to the outside interface(eg x.x.x.2)
my problem is, Whenever i check the header for message coming from the smtp server it shows that, the SMTP server is also translated by using the same outside interface public ip address(i.e x.x.x.2) which is used by other client machine to access internet instead of the x.x.x.1.
how i can get my SMTP server to use separate IP and avoid to be blacklisted by some domain.