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  • Best solution for Multi-WAN failover (inside & out)?

    - by Sean O
    Looking for a way to setup 2 ISPs in failover mode, for both incoming & outgoing traffic, for our small (<100 devices) network. The leading contender for now seems to be the Peplink Balance 310. However, a reseller I spoke with said it's great for 100% outgoing connectivity, but didn't seem to be confident in its abilities to handle incoming traffic. This is important as we host our own web site, Exchange e-mail, and virtual desktops (RDP). Do any Peplink owners use this for failover of incoming traffic? Are there other devices I should be considering? We're currently using a Cisco 1800 series router & ASA 5500 series firewall, with Comcast & T-1 lines (the goal being to replace the T with DSL/FiOS {whenever that becomes availble}). Price range: ~$1000 - $2500 USD. Thanks.

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  • Virtual Box Pen Test Lab Set Up

    - by hairyjewbear
    So i'm trying to set up a pen test lab in virtual box on my windows 7 host. I have 3 guest OS's installed: 1.) BackTrack5 2.) Centos 5 Server/Snort (My Snortbox) 3.) Win XP (Unpatched) I have 3 Ethernet adapters created IP'S 192.168.191.1 192.168.127.1 192.168.56.1 My goal is to use BackTrack5 to nmap the Win XP guest and have the snort box sniff the network. I'm new to networking and virtualization and I need help setting up my virtual network to get this to work. What should I do? All help appreciated Centos: Adapter1: NAT Adapter2: Host-only Adapter3: Internal Network Backtrack: Adapter1: Internal Network XP: Adapter1: Internal Network Also take for granted I'm on a University Network with a ridiculous firewall so I need to stay all within the host

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  • ECC RAM in GA-G33M-DS2R? Or any Gigabyte/G33M motherboard?

    - by Gregory Hoerner
    I'm looking to retire a server which has 12GB of ECC DDR2 RAM. I'd like to upgrade my multi-purpose machine (firewall, file server, VM host for Windows Home Server, etc.) using the RAM from the server. I was just wondering: Has anyone had experience using ECC RAM in a GA-G33M-DS2R motherboard (or any Gigabyte GA-G33M-XXXX motherboard for that matter)? Has anyone had experience using ECC RAM in a motherboard with a G33M chipset. I've searched everywhere and found the attitude positive of ECC memory working in a Non-ECC board, but I would like some specific positive feedback before proceeding tonight. I have to kick the entire house offline, which I don't like to do without good reason :)

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  • IPcop Multiple WAN Subnets

    - by obsidian
    We have an IPcop firewall and have had no issues with it. We've had a block of 10 IP addresses from our colocation provider and have been able port forward from those to internal servers as needed. We've recently needed additional IPs and the colocation provider issued an additional block of 10. The problem: The 10 new IP addresses issued are in a different subnet with a different gateway. The question: How do I add the new gateway into IPcop? How do I make it so that any outbound traffic in response to any inbound traffic from a new IP go back out through the new gateway? I attempted to add a static route via the console using the following command: route add -net x.x.x.x gw x.x.x.x netmask 255.255.255.192 I also added the new IPs as aliases and setup port forwarding as I've done with the existing IP block. However, when I attempt to access a web server from an external workstation, it just times out. Thanks in advance for your assistance.

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  • Linux networking "jail" for a single process

    - by halp
    I need to tune up a networking app for network specific things like: make it use a DNS server different than the default one from /etc/resolv.conf make sure it does not try to connect to certain hosts/ports using tcp/udp connections I know I can get away with just modifying /etc/resolv.conf and writing some iptables rules, but going for a default DENY firewall policy for outgoing IP packets can trigger malfunctions in other services running on the server. I know I can set up a virtual machine with a whole OS and run my app there, but it seems a bit overkill. Is it possible to have a networking "jail" for a single app (think single Linux process) that could accept iptables-like rules for network traffic (think in terms of IP packets and above) allowed to and from this particular app? Maybe this is achievable through some dynamically loaded library that can deal with the networking layer, the same manner tsocks does, but more fine-grained?

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  • Server Security

    - by mahatmanich
    I want to run my own root server (directly accessible from the web without a hardware firewall) with debian lenny, apache2, php5, mysql, postfix MTA, sftp (based on ssh) and maybe dns server. What measures/software would you recomend, and why, to secure this server down and minimalize the attack vector? Webapplications aside ... This is what I have so far: iptables (for gen. packet filtering) fail2ban (brute force attack defense) ssh (chang default, port disable root access) modsecurity - is really clumsy and a pain (any alternative here?) ?Sudo why should I use it? what is the advantage to normal user handling thinking about greensql for mysql www.greensql.net is tripwire worth looking at? snort? What am I missing? What is hot and what is not? Best practices? I like "KISS" - Keep it simple secure, I know it would be nice! Thanks in advance ...

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  • Unable to access local network when Cisco VPN client is connected

    - by bryanroth
    I'm a developer and don't have much networking expertise, so bear with me. I'm using the Cisco VPN Client 5.0.02.0090 to connect to my work's VPN that way I can RDP into my work computer. Once connected, I can't ping anything on the local network once connected to the VPN thus I am unable to access my work's network. This used to work about two weeks ago but abruptly stopped working today. However, I have the Cisco VPN Client installed on my laptop and I am able to ping and RDP into my work computer from there. Both my desktop and laptop computers are connected to the same router at home. I have tried the following so far: Rebooted my computer Reinstalled VPN client Updated NIC drivers Disabled firewall Opened up ports 500, 4500, and 10000 Any help would be much appreciated. Thanks!

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  • PPTP VPN on OS X and iOS failed to connect Facebook and Youtube

    - by bGiraffe
    Thnaks for reading. I setup a VPN server on my Buffalo WHR-HP-G300N router at Macau, and use it for access website over China Firewall when i travel in China. On Android and Windows, everything work fine, however on my Macbook Air and iPad, it is not working. I can access blocked site like badoo.com but not facebook and youtube. If i ping it at terminal, it said "ping: cannot resolve facebook.com: Unknown host". After i read this http://cp.hidemynet.com/knowledgebase.php?action=displayarticle&id=26, i find i can restart my router and reboot my Macbook, and connect to VPN before any request to any blocked site so that i can successfully connect to facebook and youtube. However it works sometime but not always. It is really annoying because i need to work on VPN and my Mac, would anyone can help me to solve it? Rather than restarting my router and my Mac every time. Please HELP!!! regards

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  • IPFW not locking people out

    - by Cole
    I've had some brute-forcing of my ssh connection recently, so I got fail2ban to hopefully prevent that. I set it up, and started testing it out by giving wrong passwords on my computer. (I have physical access to the server if I need to unblock myself) However, it never stops me from entering passwords. I see in /var/log/fail2ban.log that fail2ban kicked in and banned me, and there's a ipfw entry for my IP, but I'm not locked out. I've changed the configuration around, and then tried just using the ipfw command myself, but nothing seems to lock me out. I've tried the following blocks: 65300 deny tcp from 10.0.1.30 to any in 65400 deny ip from 10.0.1.30 to any 65500 deny tcp from 10.0.1.30 to any My firewall setup has a "allow ip from any to any" rule after these though, maybe that's the problem? I'm using Mac OS 10.6 (stock ipfw, it doesn't seem to have a --version flag) Thanks in advance.

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  • Can't access Linux machine from the network, network from the machine is fine

    - by Matt
    I'm having issues with a machine that stopped replicating with mysql. It's managed by a guy on another continent but recently I've had to get involved. The server is running Ubuntu server 9.10 I can't log in with SSH, there is no response. On the server itself I can ssh to localhost fine. I thought maybe it's the firewall rules. I'm no expert on IP Tables, but I believe that's not the issue as I removed all the rules. But it still won't let me in. Any ideas? it's acting from other machines as though the service isn't listening, but I know that it is. It's like this for all services.

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  • IP6tables blocks INPUT? can't connect with youtube API

    - by klaas
    I thought to have a simple ipv6 firewall, but it turned out to be hell. Somehow I really can't connect with any ipv6 from my machine unless I set INPUT Policy to ACCEPT. Below my current ip6tables ip6tables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT all anywhere anywhere state RELATED,ESTABLISHED ACCEPT ipv6-icmp anywhere anywhere ACCEPT tcp anywhere anywhere tcp dpt:http ACCEPT tcp anywhere anywhere tcp dpt:https Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination If I try to connect with any ipv6 adres it doesn't work? telnet gdata.youtube.com 80 Trying 2a00:1450:4013:c00::76... OR telnet gdata.youtube.com 443 Trying 2a00:1450:4013:c00::76... When I set: ip6tables -P INPUT ACCEPT It works.. but then.. well then everything is open? what is going on? Help?

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  • Why isn't Synergy working for me?

    - by Anthony
    It worked for about a week then stopped working. I'm trying to make it work between a Windows 7 laptop and a Windows XP laptop. My router is a Linksys E1000. I tried uninstalling and reinstalling the program multiple times. I've tried port forwarding. I've tried making exceptions in the firewall. I've tried disabling the firewalls. It might be relevant also that Input Director doesn't work either. What am I doing wrong?

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  • OpenVPN on Android TCP retransmissions after OpenVPN server reboot

    - by anogaki
    I raised OpenVPN on server for the first time. It worked fine until the server rebooted. The firewall configuration is unchanged. When I tcpdump from tun interface on the server, I always get TCP retransmissions on all TCP packets larger than a few bytes in Android. Using a similar(read: same) configuration on my Linux box from where I'm posting this message now works just fine; no retransmissions, no loss. It did work just fine before the server rebooted. What could possibly cause this? I already tried rebooting Android, it didn't help. Client configuration, used on both Linux PC and Android tablet: dev tun client remote 192.168.0.1 persist-key persist-tun nobind pkcs12 user.p12 mssfix 1480 cipher AES-256-CBC verb 3 1480 is below the mtu of uplink connection on server which is 1492. I tried adding tun-mtu 1480 to Android but that didn't help either.

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  • Can not connect to telnet server

    - by BloodPhilia
    So, I can't use telnet to connect to any server but it works fine from a different computer. It just says it can't connect. I tried the following things: Disable firewall and AV protection. (Basically, there was no security feature left online) Telnet is set to "Trusted" in my AV protection. (Kaspersky Internet Security 2011) Using Putty to telnet, but apparently Putty's connection is also inhibited. (Says it can't connect to host) Disabling the telnet client in Control Panel and then re-enabling it. (Windows 7 Ultimate) hosts file is clean. Checked for nasties using MBAM and KIS 2011 as well as going though my HijackThis logs, nothing found. I can connect to the same machines/servers through the web browser, ping, tracert, etc. Only telnet seems to be blocked. Any other thoughts?

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  • How to make DD-WRT router's (configured like a repeater) devices be accessible on LAN? (i.e. integrate DHCP for both routers)

    - by Annonomus Penguin
    I have a D-Link DIR-600-A1 router running DD-WRT (using the 601's firmware: except for the model number, they are near identical). It has an Atheros chip, so there is no "repeater" option. You can bypass this by setting the main radio as a client to the main router, and adding a virtual radio configured as an AP. You can then set up the credentials for connecting to the main router and allowing devices to connect to the repeater/router. I have a few devices on my network: Ethernet computers Server with Samba running WiFi devices connected to the main router I then wanted to add a repeater. I have a couple of other things on the repeater: WiFi Computer Other WiFi devices. Anyway, I wanted to connect my WiFi computer to the share on my server via Samba. However, for some reason, my router treats the main router as WAN, not another device. I've tried disabling the SPI firewall: However, that doesn't work. I've tried pinging my WiFi computer from my server. However, I can ping my server from my WiFi computer. AFAIK, they are on the same subset, just using different IPs: the main one uses 192.168.0.x and the repeater uses 192.168.1.x (starting at 100 for some reason). It seems as I need to configure my router(s) to work together for DHCP. I noticed there was a "DHCP forwarder" option, but I have no idea what that would do. A quick note: for some reason (that's beyond me) my ISP disabled the capability to bridge a WiFi to ethernet connection with the router they provide (something about PPPoE or similar...). The service rep I talked to when I was having issues after I changed ISPs said that, but they couldn't explain exactly what they were "blocking." How can I get DD-WRT to not treat the client connection as WAN and the router to recognize the devices connected to the repeater?

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  • UDP flooding multiple servers

    - by Chris Gurney
    What do you suggest? Being UDP flooded as I write to multiple servers in different data centers in 5 different countries . Up to 250,000 packets a second. I believe Cisco routers 5505 would not handle that - (some of our datacenter hosters can offer them. Some have no firewalls to offer.) Our clients naturally have constant disconnects to the server they are on. Hacker started this about three weeks ago. Sometimes for a few hours - up to a few days. If we can't stop it hitting the server with firewalls then how do we stop the hacker - now there is the challenge! Update : Found some of the data centers offer up to 10 firewall rules but would their routers be able to handle the possible volume I am talking about? Thanks Chris

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  • AWS VPN Tunnel going down without traffic

    - by Asfura
    I managed to setup a site-to-site VPN connection from Amazon VPC to a company's network, and after a lot of configuration it was working fine, but now i realized that the VPN tunnel is DOWN every time there's no traffic going trough for a couple minutes. The only way that i have found to generate traffic is to reach the amazon instance from the company's network and then the tunnel goes up again. I had a cronjob doing ping every minute, but i think it should have a keepalive option somewhere, or at least a log file of the tunnels to find out what's going on. Any ideas to keep the tunnel up and/or bring it up from amazon? The firewall is a Checkpoint R75.20, it only allows one tunnel at a time for the same subnet, so i cant have both tunnels active. Thank you, any questions just ask. EDIT I forgot to add, the ping keepalive was working great (maybe generating a bit of traffic, but nothing to worry about), the connection dropped because i had to restart the instance, and it that little time it dropped me.

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  • Can connect to Samba server but cannot access shares?

    - by jlego
    I have setup a stand-alone box running Fedora 16 to use as a file-sharing and web development server. Needs to be able to share files with a PC running Windows 7 and a Mac running OSX Snow Leopard. I've setup Samba using the Samba configuration GUI tool. Added users to Fedora and connected them as Samba users (which are the same as the Windows and Mac usernames and passwords). The workgroup name is the same as the Windows workgroup. Authentication is set to User. I've allowed Samba and Samba client through the firewall and set the ethernet to a trusted port in the firewall. Both the Windows and Mac machines can connect to the server and view the shares, however when trying to access the shares, Windows throws error 0x80070035 " Windows cannot access \SERVERNAME\ShareName." Windows user is not prompted for a username or password when accessing the server (found under "Network Places"). This also happens when connecting with the IP rather than the server name. The Mac can also connect to the server and see the shares but when choosing a share gives the error "The original item for ShareName cannot be found." When connecting via IP, the Mac user is prompted for username and password, which when authenticated gives a list of shares, however when choosing a share to connect to, the error is displayed and the user cannot access the share. Since both machines are acting similarly when trying to access the shares, I assume it is an issue with how Samba is configured. smb.conf: [global] workgroup = workgroup server string = Server log file = /var/log/samba/log.%m max log size = 50 security = user load printers = yes cups options = raw printcap name = lpstat printing = cups [homes] comment = Home Directories browseable = no writable = yes [printers] comment = All Printers path = /var/spool/samba browseable = yes printable = yes [FileServ] comment = FileShare path = /media/FileServ read only = no browseable = yes valid users = user1, user2 [webdev] comment = Web development path = /var/www/html/webdev read only = no browseable = yes valid users = user1 How do I get samba sharing working? UPDATE: Before this box I had another box with the same version of fedora installed (16) and samba working for these same computers. I started up the old machine and copied the smb.conf file from the old machine to the new one (editing the share definitions for the new shares of course) and I still get the same errors on both client machines. The only difference in environment is the hardware and the router. On the old machine the router received a dynamic public IP and assigned dynamic private IPs to each device on the network while the new machine is connected to a router that has a static public IP (still dynamic internal IPs though.) Could either one of these be affecting Samba? UPDATE 2: As the directory I am trying to share is actually an entire internal disk, I have tried to things: 1.) changing the owner of the mounted disk from root to my user (which is the same username as on the Windows machine) 2.) made a share that only included one of the folders on the disk instead of the entire disk with my user again as the owner. Both tests failed giving me the same errors regarding the network address. UPDATE 3: Not sure exactly what I did, but now whenever I try to connect to the share on the Windows 7 client I am prompted for my username and password. When I enter the correct credentials I get an access denied message. However I did notice that under the login box "domain: WINDOWS-PC-NAME" is listed. I believe this could very well be the problem. Any suggestions? UPDATE 4: So I've completely reinstalled Fedora and Samba now. I've created a share on the first harddrive (one fedora is installed on) and I can access that fine from Windows. However when I try to share any data on the second disk, I am receiving the same error. This I believe is the problem. I think I need to change some things in fstab or fdisk or something. UPDATE 5: So in fstab I mapped the drive to automount in a folder which works correctly. I also added the samba_share_t SElinux label to the mountpoint directory which now allows me to access the shares on the Windows machine, however I cannot see any of the files in the directory on the windows machine. (They are there, I can see them in the fedora file browser locally) UPDATE 6: Figured it out. See answer below

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  • pfsense multi-site VPN VOIP deployment

    - by sysconfig
    have main office pfsense firewall configured like this: local networks WAN - internet LAN - local network VOIP - IP phones need to connect remote offices (multi-users) and single remote users (from home) use IPSEC or OpenVPN to build "permanent" automatically connecting tunnels from remote location to main location. in remote locations, network will look like this: WAN - internet LAN - local network multiple users VOIP - multiple IP phones in order for the IP phones to work they have to be able to "see" the VOIP network and the VOIP server back at the main office for single remote users ( like from home ) the setup will be similar but only one phone and one computer so questions: best way to tie networks together? IPSEC or OpenVPN can this be setup to automatically connect ? any issues/suggestions with that design/topology ? QoS or issues with running the VOIP traffic over a VPN throughput, quality etc.. obviously depends on remote locations connection to some degree

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  • IIS FTP Server works locally, but cannot connect from remote

    - by Mike Christensen
    I'm trying to setup an FTP server on Windows 2008 Server. I can connect locally: C:\>ftp localhost Connected to WebHead1 220 Microsoft FTP Service However, when I try to connect from remote, it doesn't work: ~>ftp x.x.x.x ftp: Can't connect to `x.x.x.x': Operation timed out ftp: Can't connect to `x.x.x.x' I've tried everything I can think of with the settings. The FTP server is bound to all unassigned IPs and listening on port 21. I've also checked "FTP Server" in the firewall settings. Nothing appears in the FTP log files. I'm totally out of ideas!

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  • How do I setup an FTP server on Windows 7?

    - by Matt Frear
    I'm having trouble getting an FTP server setup on Windows 7. I've added the service using Control Panel - Programs - Turn Windows features on and off. I can see the service has started in Control Panel - Services. But then when I fire up a Windows command-line window, cmd, I get Not connected., C:\Users\mattf>ftp localhost ftp> ls Not connected. ftp> open localhost ftp> ls Not connected. ftp> dir Not connected. ftp> quit C:\Users\mattf> And that's as far as I've got. I have no idea why this isn't working - could it be firewall settings?

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  • Pfsense: Inbound Load Balancing https with sticky connection

    - by Zeux
    first of all I'm very sorry for my English... This is my scenario: Internet Firewall+LB: pfsense_1(Active) + pfsense_2(Passive) in CARP Pool servers: 3 x nginx(PHP5+HTTP+HTTPS) Pfsense 1 and 2 CARP configured with Virtual IP (pubblic). Nginx servers's ips are all private. I want to load balance inbound HTTP and HTTPS connections between the 3 nginx web servers. An importat thing is that the HTTPS connections must be "sticky connections": in HTTPS connections, after login by username and password, I setup a php session and therefore when a client starts a HTTPS connection it will be always redirected to the same nginx server, until it disconnects itself, it closes the page/browser or after a timeout (30minutes?) without activity. Is this possible whit the last release(2.0.1) of pfsense? thank you very much...

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  • Components needed for VPN

    - by Anriëtte Combrink
    Hi there We eventually got our Mac Mini Server. We now want to set up a small Remote Access VPN using this Mac Mini Server. Firstly we are not sure of the components needed additionally to the server to setup this VPN. We currently have the following: 1 Mac Mini Server 1 Firewall Router (Billion 802.11g ADSL2+ router with VPN capabilities [it says so on the box]) 4Mbps ADSL connection (which should have VPN capability enabled by the service provider, or so we heard) We are not sure what else needs to be included to enable our small VPN. Any advice would be really helpful.

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  • Cyrus IMAP: Unable to connect to remote host: Connection refused

    - by Nick
    I'm working on setting up a Cyrus 2.2 IMAP server on Ubuntu Server 9.04. If I telnet from the server itself: # telnet localhost imap I get: * OK IMAP Cyrus IMAP4 v2.2.13-Debian-2.2.13-14ubuntu3 server ready Which is what I should be seeing. If I try from another machine on the network: telnet 192.168.5.122 imap I get: telnet: Unable to connect to remote host: Connection refused To the best of my knowledge, there is no firewall running on the box. I've tried restarting the saslauthd and cyrus2.2 daemons, with no effect. What else can I try?

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  • Wamp virtualhost with supporting of remote access

    - by Farid
    To cut the long story short, I've setup a Wamp server with local virtual host for domain like sample.dev, now I've bind my static IP and port 80 to my Apache and asked the client to make some changes in his hosts file and add x.x.x.x sample.dev , I've also configured my httpd virtual host like this : <VirtualHost *:80> ServerAlias sample.dev DocumentRoot 'webroot_directory' </VirtualHost> Client can reach to my web server using the direct access by ip address, but when he tries using the sample domain looks like he gets in to some infinite loop. The firewall is off too. What would be the problem?! Thanks.

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