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  • Managing ip6tables (or an alternative firewall) remotely

    - by Matthew Iselin
    I'm working with IPv6 and have run into an issue configuring ip6tables on our main router in order to control what can come into the network. A default DROP rule in the FORWARD section has worked well (obviously leaving ESTABLISHED,RELATED as ACCEPT) to keep internal clients' open ports from being accessed. However, running an ip6tables command for every little change is unwieldy. Whilst we are able to continue creating rules manually, I'm wondering if there's some sort of management interface we could use to create the rules quickly and easily. We're looking to be able to save time working on our firewall as well as providing a simple method for modifying rules for those who will eventually replace us. I know webmin (heavily locked down on our network, naturally) has support for modifying iptables rules, but seemingly no support for ip6tables. Something similar would be fantastic. Alternatively, suggestions for a firewall solution apart from iptables/ip6tables which can be managed remotely wouldn't be out of order. A web interface for management is certainly preferable, even if it is just a wrapper with shiny buttons over the raw config files.

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  • Remote management interface for managing ip6tables (or an alternative firewall)

    - by Matthew Iselin
    I'm working with IPv6 and have run into an issue configuring ip6tables on our main router in order to control what can come into the network. A default DROP rule in the FORWARD section has worked well (obviously leaving ESTABLISHED,RELATED as ACCEPT) to keep internal clients' open ports from being accessed. However, running an ip6tables command for every little change is unwieldy. Whilst we are able to continue creating rules manually, I'm wondering if there's some sort of management interface we could use to create the rules quickly and easily. We're looking to be able to save time working on our firewall as well as providing a simple method for modifying rules for those who will eventually replace us. I know webmin (heavily locked down on our network, naturally) has support for modifying iptables rules, but seemingly no support for ip6tables. Something similar would be fantastic. Alternatively, suggestions for a firewall solution apart from iptables/ip6tables which can be managed remotely wouldn't be out of order. A web interface for management is certainly preferable, even if it is just a wrapper with shiny buttons over the raw config files.

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  • Firewall for internal networks

    - by Cylindric
    I have a virtualised infrastructure here, with separated networks (some physically, some just by VLAN) for iSCSI traffic, VMware management traffic, production traffic, etc. The recommendations are of course to not allow access from the LAN to the iSCSI network for example, for obvious security and performance reasons, and same between DMZ/LAN, etc. The problem I have is that in reality, some services do need access across the networks from time to time: System monitoring server needs to see the ESX hosts and the SAN for SNMP VSphere guest console access needs direct access to the ESX host the VM is running on VMware Converter wants access to the ESX host the VM will be created on The SAN email notification system wants access to our mail server Rather than wildly opening up the entire network, I'd like to place a firewall spanning these networks, so I can allow just the access required For example: SAN SMTP Server for email Management SAN for monitoring via SNMP Management ESX for monitoring via SNMP Target Server ESX for VMConverter Can someone recommend a free firewall that will allow this kind of thing without too much low-level tinkering of config files? I've used products such as IPcop before, and it seems to be possible to achieve this using that product if I re-purpose their ideas of "WAN", "WLAN" (the red/green/orange/blue interfaces), but was wondering if there were any other accepted products for this sort of thing. Thanks.

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  • System and Router configuration for setting up a home firewall based on Zentyal

    - by Ako
    I am not much of a system administrator, so please be patient if this looks too simple for you. I have a several computers at home, and all of them connect using an ADSL modem/router (and Wireless AP). I have been attacked several times (mainly from Russia and Ukraine), so I thought I should have some kind of firewall, besides the ESET firewall on my Windows 7. So now I have these (new) configuration: I have a small ADSL modem (Zyxel brand) which has only one Ethernet port. This modem is used to connect to internet and is configured in NAT mode. The interface has is configured with IP address 192.168.1.1. I have an old PC and I have installed zentyal on it. It has two Ethernet ports, eth0 and eth1. Eth0 is connected to the Zyxel modem with IP 192.168.1.2 and is checked as the WAN interface (external). I have another ADSL modem which is also a router with 4 Ethernet ports and Wireless AP. One of the Ethernet ports is connected to eth1 on Zentyal box. The Ethernet port's IP is 192.168.2.1 and Zentyal's eth1 is 192.168.2.2. Now, I want to enable other computers to connect to internet through the router both using Wireless and Ethernet. The problem is that I don't know how to configure the router so it routes connections to the Zentyal box. Does anyone have any clue? Again I am sorry if this looks stupid. Thanks.

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  • Windows Server 2008 ignores any change made to firewall

    - by Maurice Courtois
    I have been trying for the last 2 hours to make my Windows Server 2008 answer ping. I have tried almost every single solution I have found on the web, so far nothing work. My current setup: 2 NIC (1x Internet connection, 1x Local network) Server act as VPN server. So I set the corresponding NIC as either Public or Private. I also enable the rule for "File and Printer Sharing (Echo Request...)" for all Nic and from any IPs. I always been able to ping from the local network or the local ip while connected to the VPN. I also tried to create a specific rule for ICMP ping and disabling the firewall for all but the public nic. Regardless of all this, I still can't ping that server from Internet. Any idea suggestion what could cause this? I have the impression that when you set the server as VPN (I switch the box on when setting it up to block everything else than VPN connection) that changing anything to the firewall setting thought mmc is pointless !?!?

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  • Connection failed between Windows Servers

    - by Kerby82
    I'm setting up an infrastructure based on Windows Server 2012. The firewall is turned off and I can't access the Domain controller to check for the group policy. I'm experiencing some connection problem between servers. All the servers are running a site on the TCP Port 80 and I check with netstat that the web server is binding on every Ip of the servers. If i try to telnet from the server itself on the port 80 it works (using DNS name) if I try same telnet from another machine I get connection failed. The DNS works, the ping is successfull, the servers are on the same subnet, the firewall is turned off (even though windows advanced firewall says that some settings can be managed by the System Administrator, i guess group policy). I don't know how to troubleshoot further. Do you have any idea? Is that possible that the FW looks turned off but there are some group policy blocking the connections? (I also check group policy-Administrative Template-Network Connections- Windows FW everything is not configured) I need some hint on how to keep troubleshooting such a problem.

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  • Packet dropped even when firewall is turned off in windows server 2008

    - by LightX
    We have a windows 2008 server and lately we have started seeing a lot of 5152 Events logged in the server (Windows Filtering Platform blocked a packet). We have an inbound rule configured to allow connections to the port which was working fine earlier. I'm not sure what changed lately. But this doesn't make any sense. The packet is dropped even when windows firewall is disabled. What am I missing?

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  • Windows Server Firewall report

    - by Yves
    Hi, I am trying to get a list of all sites (ips) visited by a computer on the network. Is there a way to ask the Windows firewall to return me a report of all the sites for a specific IP address on the network (domain)? Thanks p.s: Am using Windows Server 2008

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  • Which linux-based firewall?

    - by Atlas
    We are looking to replace our current aging firewall/router with a new one. We would prefer it to be free/opensource if possible. Our minimum requirements would be: 1) Site-to-site VPN 2) Web URL/IP filtering 3) 2 WAN connections with load-balancing 4) Easy-to-use web inferface Any suggestions? and why you chose yours.

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  • MediaTemple Plesk Firewall Module

    - by cappuccino
    My MediaTemple Plesk Firewall Module seems to have just stop reflecting the rules in the iptables. I want to uninstall and reinstall the module, however, have no idea where to get the module package. Anyone know where to get the module?

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  • ClearOS transparent firewall and web proxy mode possible?

    - by Scott Szretter
    In other firewall software packages I have seen the ability and am hoping it is possible with ClearOS to put it in to transparent or bridged mode where the device sits physically between the client workstations and the internet router, but is the client workstation has the internet router address as it's gateway, not the clearos machine. The client workstation would also not have to enter an http proxy address as that would be transparent. Is this possible and how do you configure ClearOS this way? Thanks!

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  • Windows Server 2008 firewall rules order problem

    - by vnuk
    I have one rule that opens FTP port for all connections. I have second rule that blocks ALL connections on ALL protocols for some IP's. However, connections from those IP's that are blocked can still connect to FTP port because that rule obviously takes preccedence. How can I make this work, because I do not see how can I adjust order of rules on Windows Firewall.

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  • Ubuntu 11.10 firewall/gateway - no client internet access

    - by Siriss
    I have read many other posts but cannot figure this out. eth0 is my external connected to a Comcast modem. The server has internet access with no issues. eth1 is internal and running DHCP for the clients. I have DHCP working just fine, all my clients can get an IP and ping the server but they cannot access the internet. I am using ISC-DHCP-SERVER and have set /etc/default/isc-dhcp-server to INTERFACE="eht1" Here is my dhcpd.conf file located in /etc/dhcp/dhcpd.conf ddns-update-style interim; ignore client-updates; subnet 10.0.10.0 netmask 255.255.255.0 { range 10.0.10.10 10.0.10.200; option routers 10.0.10.2; option subnet-mask 255.255.255.0; option domain-name-servers 208.67.222.222, 208.67.220.220; #OpenDNS # option domain-name "example.com"; default-lease-time 21600; max-lease-time 43200; authoritative; } I have made the *net.ipv4.ip_forward=1* change in /etc/sysctl.conf here is my interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp iface eth1 inet static address 10.0.10.2 netmask 255.255.255.0 network 10.0.10.0 auto eth1 And finally- here is my iptables.conf file: # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *nat :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -s 10.0.10.0/24 -o eth0 -j MASQUERADE #-A PREROUTING -i eth0 -p tcp --dport 59668 -j DNAT --to-destination 10.0.10.2:59668 COMMIT *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i eth1 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT -A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT -A FORWARD -s 10.0.10.0/24 -o eth0 -j ACCEPT -A FORWARD -d 10.0.10.0/24 -m state --state ESTABLISHED,RELATED -i eth0 -j ACCEPT -A FORWARD -p icmp -j ACCEPT -A FORWARD -i lo -j ACCEPT -A FORWARD -i eth1 -j ACCEPT #-A FORWARD -i eth0 -m state --state NEW -m tcp -p tcp -d 10.0.10.2 --dport 59668 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT I am completely stuck. I cannot figure out why the clients cannot access the internet. Am I missing a service? Is a service not running? Any help would be greatly appreciated. I tried to be as thorough as possible but please let me know if I have missed something. Thank you!

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  • Is there a filesystem firewall?

    - by Jenko
    Ever since firewalls appeared on the scene, it became hard for rogue programs to access the internet. But you and I know that running applications get unrestricted access to the filesystem. They can read your files and send them to poppa. (programs such as web browsers and IM clients, which are allowed thru the internet firewall) Any way to know which programs are accessing your files? or limit their access to a specific partition?

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  • Firewall - Preventing Content Theft & Rogue Crawlers

    - by drodecker
    Our websites are being crawled by content thieves on a regular basis. We obviously want to let through the nice bots and legitimate user activity, but block questionable activity. We have tried IP blocking at our firewall, but this becomes to manage the block lists. Also, we have used IIS-handlers, however that complicates our web applications. Is anyone familiar with network appliances, firewalls or application services (say for IIS) that can reduce or eliminate the content scrapers?

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  • Identify Deprecated Rules on Checkpoint Firewall

    - by Basa
    I've been asked to find the deprecated rules among the thousands of rules in our Checkpoint firewall. I could do it by writing a perl program to analyze the log and lists of objects & rules, but i wanted to know if anybody knows of an easier way before reinventing the wheel. I have access to SmartView Monitor et SmartView Tracker and i wanted to know if anybody knew of a way to achieve my goal with those tools.

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  • Firewall/Router upgrade

    - by Atlas
    We've been using a SonicWall TZ170 for several years, it's been working fine with occasional glitches. Now we switched to a 100Mpbs broadband, and the firewall has become the bottleneck for internet access because its max throughput is around 20-30Mpbs. Any ideas for a replacement? Brand/Model?

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  • WCF service blocked by Windows Firewall

    - by Michael Stoll
    Hi, I've got a WCF service using a HttpBinding. The service is running in a self hosting process (A Windows Service) and this process is inside the Windows Firewall exceptions list. If the Firewall is active and I'm trying to access the service using a C# client or Internet Explorer, the service does not respond. But if the Firewall is disabled the connection works like a charm. Does anyone have expirence with WCF and the Windows Firewall? The problem came up on Windows 7 64bit. I didn't try another OS yet. Regards Michael

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  • How to have internet connection over VPN while "Microsoft Firewall Client for ISA server" is running

    - by blocked
    I have the software mentioned in the title running on my machine. When I connect over VPN to my company's network, my internet connection gets borked, because somehow the ISA firewall blocks it. This is completely idiotic, because my work involves extensive use of the internet, so having to disconnect and reconnect continuously seriously cripples my productivity. (Meaning: I'm tearing my hair out here.) Can I have my VPN connection and somehow still have my internet connection too? I'm open to any solution.

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  • Packet logging on PIX firewall

    - by georged.id.auindex.htm
    We have a Cisco PIX 515 firewall and I would like to set up a simple logging that would give us a traffic breakdown for billing by: source destination protocol port size time PIX is plugged into Catalyst 2970 and I was told that the best thing since sliced bread for logging is to get Netflow and get Catalyst to log. My concern, however, (besides the Netflow cost) is that I really don't want to "listen" to the internal noise and all I'm interested in are the external traffic stats above for billing and analysis purposes. What would be the simplest and the easiest solution? Cheers George

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