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  • Is there a small business router that shows bandwidth usage graphs in the admin panel?

    - by Robert Drake
    I support a large number of public libraries that are having their networks upgraded in response to a grant application. These libraries are generally home to between 6-15 computers and have little or no tech services either onsite or contracted remotely. In order to justify current and future purchases, a number of the libraries have requested routers that can provide bandwidth usage graphs that they can show to their managing boards. Is there a small business router that displays traffic graphs in the router administration web interface? The router needs to suppport DHCP and basic firewalling. No other features are required. Further, the reports just need to show overall trends. It is not necessary to show traffic by IP, by protocol/application, or by time of day. They just need an overall week to week, month to month, trend line. I'm familiar with MRTG/PRTG/tools that collect SNMP data from the router, but the libraries don't have the expertise for the configuration. I've considered installing the tomato firmware on some cheap home/home office routers, but if there's a commercial product that can be purchased that would be significantly simpler. Also the library boards would be much more likely to approve the purchase of a commercial product over a 'hacked' one. Any assistance would be appreciated.

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  • Setting up 802.1X wireless connection on OSX

    - by hizki
    I am an OSX user, I have Snow Leopard 10.6.5 and an updated AirPort (version 5.5.2). I am trying to connect to my university's wireless network, but it has a 802.1x security that I am having trouble defining... Here there are instructions for connecting with Windows XP, Windows 7 and Linux. Can someone please instruct me what should I do to set up this network on my Mac? I have had previous success in setting up this network, but I have no idea what I did that made it work. Since I updated my AirPort (to version 5.5.2) it worked only seldomly and very slowly... Before the update, even when it worked it never remembered my password. Update: I have already tried to create a new "location", removed all the 802.1x user profiles and all the remembered networks, and made sure the in the TCP/IP tab 'Configure IPv4' is set to "Using DHCP". I also moved /Library/Preferences/SystemConfiguration/preferences.plist to my desktop in attempt to force the system to create a new set of settings. Still I can define the connection to work.

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  • Creating a ssh tunnel to transfer files?

    - by Vincent
    For me, networks are a very "opaque" thing, and even with reading a lot of tutorial about SSH, I do not understand how to create a basic tunnel to transfer my files. The configuration is the following : My Computer --[Internet]--> Bridge Machine --[Local Network]--> Final Machine Currently I do the following : 1) Connect to the Bridge Machine with : ssh -X [email protected] 2) Connect to the Final Machine with : ssh -X username@finalmachine 3) I copy the address of files I need (for example .../mydirectory) 4) Then I deconnect from the finalmachine with : exit 5) I copy the files to the bridge : scp -r username@finalmachine:/.../mydirectory . 6) I deconnect from the bridge with : exit 7) I copy the files to my machine : scp -r [email protected]:/.../mydirectory . Which is quite complicated. My question is basic : how to simplify this using a SSH tunnel ? (and please explain me the signification of each command line you write, to understand what each line really do and to avoid to use it like a magical thing. Furthermore if some ports number are used, explain me if I can pick a completely random number or if I have to choose a specific one.)

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  • Only one domains not resolving via Windows DNS server at multiple locations, but is at others

    - by Brett G
    I'm having quite a weird issue. Had mail delivery issues to a specific domain. After looking closer, I realized that the DNS for that domain isn't resolving via the in-house Windows 2003 SP2 DNS server. C:\>nslookup foodmix.net Server: DC.DOMAIN.com Address: 10.1.1.1 DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. *** Request to DC.DOMAIN.com timed-out (DC.DOMAIN.com and 10.1.1.1 are generic values to replace the actual ones) Even if I run this nslookup from the DC.DOMAIN.com server, I get the same result. However, all other requests are working as they should. I tried it on severs at completely separate organizations on different networks(Windows 2003 AD servers). The weird thing is some of these were having the same exact issue. However using public DNS servers work. I have tried clearing the DNS cache, restarting the server, restarting the services, etc. Nothing has worked. One weird event I noticed in the DNS Server Event Logs that might be related is an event ID of 5504 with the following description: The DNS server encountered an invalid domain name in a packet from 192.33.4.12. The packet will be rejected. The event data contains the DNS packet. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. In the data section below, I can see the following mentioned: ns2.webhostingstar.com Which happens to be the nameserver for the domain in question. Several discussion threads and a MS KB have pointed to disabling EDNS. I have done this via "dnscmd /config /enableednsprobes 0" and it has not fixed the issue.

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  • Why is my Network Connections list empty?

    - by DealerNextDoor
    I'm sure this question has been asked before, but none of the links I have found have worked. I've been trying to find fixes for the past couple of weeks. This all started a few days after I got my router. At first, I thought it was just something that would fix it self. But as usual, it never does. I am trying to update my router's wireless card to try and fix this problem, but I need to get the card's information to update it on the HP website. And since my Network Connections list is empty, I can't get any information about it. So to get around this, I tried to go to 'Manage Wireless Networks', and when I tried to get the properties from there, I get this error: Windows has encounter an error saving the wireless profile. Specific Error: The data is invalid. So, what all can I do to try and fix this? Any help will be appreciated. EDIT: Sorry, forgot to put router info. Router Model: WNR1000v2-V2 Router Maker: NETGEAR Router Firmware Version: V1.0.0.12NA The router is up-to-date on all updates.

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  • Can't connect to public WiFi with MacBookPro at coffee shops and libraries

    - by Nathan Bowers
    The Problem: I can't connect to public, unencrypted WiFi at my local public library or Peets Coffee. My Setup: Late 2006 MacBookPro running 10.5.8. I have Parallels installed. It's supposed to work like this: 1) Connect to their unencrypted WiFi network 2) Open a browser which redirects you to their "enter password/agree to terms" page. 3) Browse normally. I can connect to the WiFi network, but when I try to authenticate I always get stuck in a redirect loop. It's been like this for a while. Even before I upgraded to 10.5.8. I never have trouble with encrypted networks or regular open WiFi. What I've tried: Disabling Parallels connections in Network Prefs. Superstition: somehow Parallels installed something in the network stack that's messing me up. Pinging the IP address of the WiFi node I'm connected to. I can ping it, it's there, but I still get stuck in this authentication redirect loop. Tried different browsers, tried different cookie and security settings. Even tried IE under Parallels. No dice. Tried flushing DNS cache. Asked library and coffee employees for help. It didn't go well. My Question: Anybody else have this problem? What should I be looking for?

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  • Networking Problem MrxSmb event 50 "Delayed Write Failed" errors occurring all of the sudden

    - by Johnny Musso
    JUST THIS MONTH, we have started getting reports from a number of very stable clients that MrxSmb event id 50 errors keep appearing in their system event logs. Otherwise, they do not appear to have any networking problems except that there is a critical legacy application which seems to either be generating the MrxSmb errors or having errors occur because of them. The legacy application is comprised of 16 bit and 32 bit code and has not been changed or recompiled in many years. It has always been stable on Windows XP systems. The customers that have the problem usually have a small (5 clients or less) peer to peer network with all Windows XP systems. All service packs are loaded on the XP machines. Note: The only thing that seems to correct the problem is disabling opportunistic locking. I don't like this solution because it seems to slow down the network and sometimes causes record locking issues between users (on some networks). Also, this seems to have just started happening - as if a Windows update for XP has caused it? However, I have removed recent updates and it did not correct the issue. Thanks in advance for any help you can provide.

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  • cannot connect to vpn server (error 721)

    - by callmeblessed
    I got 2 internet connections in my computer. One is using 3.5G HSDPA modem (vodafone huawei e220) and the other using mobile phone (cdma zte c261). Both are using different ISP and i have both. at the moment, i can connect to my office vpn using the HSDPA modem one. But when i tried to use cdma modem (dial up - mobile phone modem), i am just able to get "verifying username and password" and then after a few minutes it display error : Error 721 The Remote Computer didn't respond. I tried to ping into my office ip address, it got good result but still cannot connect to the vpn. I tried to turn off all my firewall (i'm using commodo) and has no response as well. In my cdma mobile phone modem Network connections I tried to allow iNternet connection sharing as well ... and turn on all Internet Protocol TCP/IP, File & Printer Sharing & Client for microsoft networks. But all of my effort has no effect. How to fix this problem ? note: my office using windows vpn as well. thank you .

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  • Cisco IOS policy route for router originated VPN traffic

    - by Paul
    We have a Cisco IOS router with two DSL connections. One of them is intended for general traffic (ADSL), the other for VPN links (BDSL) and various other traffic. So the default route is the ADSL link, and we have a combination of static routes for the VPN traffic, and policy routes for other traffic types that should go out the BDSL link. For site to site traffic, this is fine, we just static route the public IPs and remote networks out of the BDSL line. The policy based routing works fine for any internal traffic that matches an ACL. The problem is now that there are remote VPN sites originating from dynamic addresses, so we cannot use static routes. The replies to incoming ISAKMP requests are following the default route out of the ADSL (despite there being no crypto map on that interface). I want to route the outgoing VPN traffic out of the BDSL. I have tried adding udp/500 and esp to and from the route-map acl that pushes traffic out of the BDSL line, but it doesn't match, presumably because the route-map happen earlier than the IPSec stuff. Any ideas how I can do this? IOS ver: 12.4.13T.

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  • NIS user not being added to NIS group

    - by Brian
    I have set up a NIS server and several NIS clients. I have a user and a group on the NIS server like so: /etc/passwd: myself:x:5000:5000:,,,:/home/myself:/bin/bash /etc/group: fishy:x:3001:otheruser,etc,myself,moreppl I imported the users and groups on the NIS client by adding +:::::: to /etc/passwd and +::: to /etc/group. I can log in to the NIS client, but when I run groups, fishy is not listed. But getent group fishy shows that it was imported correctly and lists me as a member. And if I do sudo su - myself, then suddenly groups says I am in the group! I also had nscd installed, and the groups worked correctly for a while. It seemed like after being logged in for a while, I would silently be dropped out of the group. If I restarted nscd and logged in again, then the groups worked correctly...for a while. There are no UID or GID conflicts with local users or groups. Update: Contents of /etc/nsswitch.conf: passwd: compat group: compat shadow: compat hosts: files nis dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis aliases: nis files

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  • How do I get a Wireless N PCi card to connect to a wireless G router?

    - by Andy
    I'm having some problems setting up a new wireless PCI card on a WinXP SP3 PC. I know that the router is configured correctly. It is a Linksys WRT54GL, using 802.11b/g. Security mode is WPA2 Personal with TKIP+AES encryption. I am able to connect to this fine using my laptop (first gen MacBook with a 802.11b built in card). The new PCI card is also Linksys, but it supports 802.11n. Card seems to be installed ok (Windows sees it fine, doesn't list any errors in Device Manager), however when it scans for available wireless networks it can't find my wireless network (the router is set to broadcast the SSID). I tried to enter the network SSID manually, but that didn't seem to help. I chose WPA2-PSK for network authentication. The only options for encryption are TKIP or AES - I've tried both, neither worked. I am sure that I typed in my wireless key correctly. At this point, I don't think the problem is with encryption, but something else. It almost seems like I need to switch the wireless card into g mode, but I haven't found a way to do that (if that is even possible/necessary - I thought n was fully backwards compatible with g). Also, the PC is in the same room as the router, and my laptop, so I don't think that it is an interference issue. Any ideas what I'm doing wrong? I'm running out of things to try at this point. :(

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  • How to use the AWUS036H on MacBook Pro with Lion and Backtrack in VM?

    - by Swader
    I have the AWUS036H USB WiFi adapter and have recently upgraded the OSX to Lion. The thing is, there are no drivers for Lion for the AWUS036H, and I would have to boot into 32bit mode every time I want to launch the adapter as per instructions here: http://www.youtube.com/watch?v=n9_HAGi1ce0 I also want to install BackTrack as I deal in networks a lot for my company. While this would be a simple matter on any other laptop, the company issued Macbook does not allow booting into any OS other than MacOSX or Windows with Bootcamp. Now, since dual booting into BT is not an option, I would like Backtrack to run in VM inside my MacOSX Lion - and this it does. It works like a charm inside VirtualBox. But since there are no 64bit drivers for the wifi adapter, Lion doesn't recognize it and cannot install it. This, in turn, means that Backtrack cannot see it even though AWUS036H usually works flawlessly with BT. How can I make my VM-based BT see the wifi adapter even if the parent OS doesn't see it, if at all? Is there a way, or am I better off buying a new WiFi adapter that supports OSX 10.7 such as the AWUS036NHR?

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  • Windows 7 - Windwos XP - sharing - why isn't working?

    - by durumdara
    Hi! This is seems to be "hardware" and not "software" / "programming" question, but I need to use this share in my programs, so it is "close to programming". We had an XP based wireless network. The server is XP Professional, the clients are XP Home (Notebooks). This was working well with folder sharing (with user rights, not simple share). Then we replaced the one of the notebook with Win7/X64 notebook. First time this can reach the server, and the another client too. Later I went to another sites, and connect to another servers, another networks. And then, when I return to this network, I saw that I cannot connect to this server. Nothing of resources I see, and when try to dbl click on this computer, I got login window, where I can write anything, never I can login... The interesting part, that: Another XP home can see the server, can login as quest, or with other user. The server can see the XP home notebook. The Win7 can see the notebook's shared folders, and XP home can see the Win7 shared folders. The server can see the Win7 folders, BUT: the Win7 cannot see the server folders. Cannot see the resources too... The Win7 is in "work networking group", the group name is not mshome. I tried everything on the server, I tried to remove MS client, restore it with simple sharing, set guest password, etc., but I lost the possibilities to access this server from Win7. Does anyone have any idea what I need to see, what I need to set to access these resource - to use them in my programs? Thanks for every info, link: dd

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  • Do all routers really must know all routes to every router?

    - by Philipili
    This is my complicated and long question. First let's talk about the context. Network topology: PC A --- RT A --- RT C --- RT B --- PC B (RT C has a WAN NIC connected to "the cloud") With this situation : PC A must send a packet to PC B Default routes direct packets to the cloud We haven't access to RT C's configuration RT C only knows how to join network A, not network B RT A knows about network B RT B knows about network A RT C's routing table: Destination NIC Gateway 0.0.0.0 WAN Cloud Network A LAN A RT A's WAN RT A's routing table: Destination NIC Gateway 0.0.0.0 WAN LAN A Network B WAN LAN A RT B's routing table: Destination NIC Gateway 0.0.0.0 WAN LAN B Network A WAN LAN B I would like to permit PC A and PC B to communicate, but I don't have access to RT C. Networks B and BC are new. Can PC A send a packet to RT B's WAN NIC (which is possible) and "ask RT B to direct the packet to PC B" ? I believe replacing RT B with a VPN server should do the trick, but I would like to know if it is possible to make it without establishing a new connection.

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  • Microsoft Windows DHCP: Steering IPv4 clients into specific scopes based on MAC

    - by Easter Sunshine
    We have visitors on our campus who bring their own laptops and devices and use our wireless and wired networks. When we receive a copyright infringement notice (typically BitTorrenting), we are required to quarantine that MAC address so that it no longer has Internet access. No matter what website it tries to visit, it is sent to a web page explaining to the user that the device has been quarantined. We have thus far implemented this in ISC DHCP on Linux. We have multiple VLANs with one or more public-IP subnets and one RFC1918 quarantine subnet each. All clients are leased IPs in the public-IP subnet(s) unless you're in a list of known bad MACs. Then, you are sent to the quarantine subnet so that your traffic is unroutable on the Internet (you are isolated by subnet only, not by VLAN). We would like to move to Windows DHCP in light of the IPAM role but I cannot figure out how to replicate this in Windows DHCP 2012 (Assign DHCP IPs for specific MAC prefixes on Windows Server 2008 R2 suggests it was not possible in 2008 R2), even while using policies. So here's what I'd like: The administrator/help desk provides and maintains a list of MAC addresses that are to be quarantined. The DHCP server places those MACs into the quarantine subnet on the respective VLAN, no matter which VLAN the client is in. I don't think reservations would work: We currently have about 300 registered bad MACs and about 12 VLANs. I don't want to make 300 x 12 reservations nor have to add 12 reservations per new MAC address. Not to mention all of the quarantine subnets are /24s. We do not have NPS/NAC. You do not have to register your MAC address get network access. We use Cisco routers/switches. Thanks.

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  • Windows 7 x64 wired connection problem. IP, gateway, dns assigned, can't ping. Network detected as "Network"

    - by Emil Lerch
    I am having a problem connecting to a specific wired network with my Latitude E6410 laptop. Other wired networks seem to work fine, but this one does not. I have a coworker with me with the same Intel 82577LM Gigabit Network card, and he can connect just fine. I've updated to the latest Intel drivers (11.8.75.0) and am not using Pro Set. I obtain all DHCP information just fine (IP, netmask, DNS server, default gateway). I cannot ping anything (internal or on the Internet - I tried pinging Google's public DNS servers by IP 8.8.8.8), nor can I get answers to any DNS queries through NS Lookup. Windows troubleshooting says everything is fine, but I can't get DNS responses. I've seen issues like this in the past that were related to link speed/duplex autonegotiaion failures, so I've tried manually setting link speed/duplex to all values one by one with no success. My coworker is using all default settings, so he is just using autonegotiate. Any ideas of other things to try?

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  • Multiple Set Peer for VPN Failover

    - by Kyle Brandt
    I will have two Cisco routers at Location A serving the same internal networks, and one router in location B. Currently, I have one router in each location with a IPSec site-to-site tunnel connecting them. It looks something like: Location A: crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location B set peer 12.12.12.12 set transform-set ESP-3DES-SHA match address internal-ips Location B: crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location A set peer 11.11.11.11 set transform-set ESP-3DES-SHA match address internal-ips Can I achieve fail over by simply adding another set peer at location B?: Location A (New secondary Router, configuration on previous router stays the same): crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location B set peer 12.12.12.12 set transform-set ESP-3DES-SHA match address internal-ips Location B (Configuration Changed): crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location A set peer 11.11.11.11 ! 11.11.11.100 is the ip of the new second router at location A set peer 11.11.11.100 set transform-set ESP-3DES-SHA match address internal-ips Cisco Says: For crypto map entries created with the crypto map map-name seq-num ipsec-isakmp command, you can specify multiple peers by repeating this command. The peer that packets are actually sent to is determined by the last peer that the router heard from (received either traffic or a negotiation request from) for a given data flow. If the attempt fails with the first peer, Internet Key Exchange (IKE) tries the next peer on the crypto map list. But I don't fully understand that in the context of a failover scenerio (One of the routers as Location A blowing up).

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  • windows Home Server backup error

    - by domen
    I've finally built my WHS, but some other problems have showed up. I've googled, binged and searched SU with no success. The problem is following: at the moment I've got a Win7 laptop and Win7 PC, which should be backed up by the WHS. Laptop is backed up just fine with no issues, but when I try to manually backup the PC, after "backup is starting" message, when backup service should be monitoring changes on partitions, PC gets disconnected from the home network and thus, the backup process is stuck. Disabling/enabling network adapter gets PC back on the network. The only thing I've tried was reinstalling connector software. no success. Also, I've downloaded connector troubleshooter and only thing it says is "DHCP server was not found". I'm not good with networks, so I couldn't figure out what could that indicate (all computers in the network are assigned static IPs). Any ideas what the problem can be? I can provide any additional information, I'm just not sure what may be helpful right now. Thanks.

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  • Creating basic, redundant gigE or IB storage network for Xen?

    - by StaringSkyward
    With only a modest budget, I want to move my 4 xen servers over to network storage -either NFS or iSCSI which will be determined based on how well it performs when we test it (we need good throughput and it must continue to work through link and switch failure tests). We may add another couple of xen servers at some point when this is done. I don't know much about the design and operation of storage networks, so would really appreciate some hints from those with experience. The budget is around $3,800 excluding the storage appliance. I am currently thinking these are my options to remain on budget: 1) Go for used infiniband hardware and aim for 10gb performance. 2) Stick with gig ethernet and buy some new switches (cisco or procurve) to create a storage-only ethernet LAN. Upgrade to 10gigE later but try to use hardware capable of it where possible to reduce upgrade costs. I have seen used, warrantied infiniband switches at reasonable prices (presumably because big companies are converging on 10gbit ethernet?) and the promise of cheap 10gb is attractive. I know nothing about IB, so here come the questions: Can I buy 2 x switches and have multiple HBAs in my xen and storage nodes to get redundancy and increased performance without complexity or expensive management software costs? If so, can you point me to some examples? Do NFS and iSCSI work just the same regardless? Is IB a sensible choice or could/should I use ethernet or FC on the same budget - I'm keen not to get boxed into a corner for future upgrades, however. For the storage I am likely to build a storage server using nexentastor with the intention that I can later add more disks, SSDs and add another server to provide a failover option at the storage level. An HP LeftHand starter SAN is also under consideration, too. Thanks in advance.

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  • A star vs internet routing pathfinding

    - by alan2here
    In many respects pathfinding algorythms like A star for finding the shortest route though graphs are similar to the pathfinding on the internet when routing trafic. However the pathfinding routers perform seem to have remarkable properties. As I understand it: It's very perfromant. New nodes can be added at any time that use a free address from a finite (not tree like) address space. It's real routing, like A*, theres never any doubling back for example. IP addresses don't have to be geographicly nearby. The network reacts quickly to changes to the networks shape, for example if a line is down. Routers share information and it takes time for new IP's to be registered everywhere, but presumably every router dosn't have to store a list of all the addresses each of it's directions leads most directly to. I can't find this information elsewhere however I don't know where to look or what search tearms to use. I'm looking for a basic, general, high level description to the algorithms workings, from the point of view of an individual router.

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  • Two DHCP servers on the same network

    - by CesarGon
    We are setting up a routing link between the Windows Server 2008 networks of two different buildings in my organisation. Each network uses a different IP addressing scheme (one uses public addresses, the other one uses private), but the goal is having a single Windows Server domain across the gap between the buildings. The link is provided by a 100-Mbps point-to-point line. I have always understood that you should not have more than one DHCP server on a network. However, we are planning to put a domain controller on each building, and each domain controller will be a DNS server and a DHCP server as well. The intention is that a machine booting up in building A gets its IP address from the DHCP server closer to it, in building A, while a machine booting up in building B gets an address from the DHCP server in building B. Since the two buildings will be linked and the network will be only one, will this work? How can I avoid that a machine booting up in building A gets an address from the DHCP server in building B (or vice versa)? Thanks.

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  • Two DHCP servers on the same network

    - by CesarGon
    We are setting up a routing link between the Windows Server 2008 networks of two different buildings in my organisation. Each network uses a different IP addressing scheme (one uses public addresses, the other one uses private), but the goal is having a single Windows Server domain across the gap between the buildings. The link is provided by a 100-Mbps point-to-point line. I have always understood that you should not have more than one DHCP server on a network. However, we are planning to put a domain controller on each building, and each domain controller will be a DNS server and a DHCP server as well. The intention is that a machine booting up in building A gets its IP address from the DHCP server closer to it, in building A, while a machine booting up in building B gets an address from the DHCP server in building B. Since the two buildings will be linked and the network will be only one, will this work? How can I avoid that a machine booting up in building A gets an address from the DHCP server in building B (or vice versa)? Thanks.

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  • I have added a port to the public zone in firewalld but still can't access the port

    - by mikemaccana
    I've been using iptables for a long time, but have never used firewalld until recently. I have enabled port 3000 TCP via firewalld with the following command: # firewall-cmd --zone=public --add-port=3000/tcp --permanent However I can't access the server on port 3000. From an external box: telnet 178.62.16.244 3000 Trying 178.62.16.244... telnet: connect to address 178.62.16.244: Connection refused There are no routing issues: I have a separate rule for a port forward from port 80 to port 8000 which works fine externally. My app is definitely listening on the port too: Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 99 36797 18662/node firewall-cmd doesn't seem to show the port either - see how ports is empty. You can see the forward rule I mentioned earlier. # firewall-cmd --list-all public (default, active) interfaces: eth0 sources: services: dhcpv6-client ssh ports: masquerade: no forward-ports: port=80:proto=tcp:toport=8000:toaddr= icmp-blocks: rich rules: However I can see the rule in the XML config file: # cat /etc/firewalld/zones/public.xml <?xml version="1.0" encoding="utf-8"?> <zone> <short>Public</short> <description>For use in public areas. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections are accepted.</description> <service name="dhcpv6-client"/> <service name="ssh"/> <port protocol="tcp" port="3000"/> <forward-port to-port="8000" protocol="tcp" port="80"/> </zone> What else do I need to do to allow access to my app on port 3000? Also: is adding access via a port the correct thing to do? Or should I make a firewalld 'service' for my app instead?

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  • Prevent outgoing traffic unless OpenVPN connection is active using pf.conf on Mac OS X

    - by Nick
    I've been able to deny all connections to external networks unless my OpenVPN connection is active using pf.conf. However, I lose Wi-Fi connectivity if the connection is broken by closing and opening the laptop lid or toggling Wi-Fi off and on again. I'm on Mac OS 10.8.1. I connect to the Web via Wi-Fi (from varying locations, including Internet cafés). The OpenVPN connection is set up with Viscosity. I have the following packet filter rules set up in /etc/pf.conf # Deny all packets unless they pass through the OpenVPN connection wifi=en1 vpn=tun0 block all set skip on lo pass on $wifi proto udp to [OpenVPN server IP address] port 443 pass on $vpn I start the packet filter service with sudo pfctl -e and load the new rules with sudo pfctl -f /etc/pf.conf. I have also edited /System/Library/LaunchDaemons/com.apple.pfctl.plist and changed the line <string>-f</string> to read <string>-ef</string> so that the packet filter launches at system startup. This all seems to works great at first: applications can only connect to the web if the OpenVPN connection is active, so I'm never leaking data over an insecure connection. But, if I close and reopen my laptop lid or turn Wi-Fi off and on again, the Wi-Fi connection is lost, and I see an exclamation mark in the Wi-Fi icon in the status bar. Clicking the Wi-Fi icon shows an "Alert: No Internet connection" message: To regain the connection, I have to disconnect and reconnect Wi-Fi, sometimes five or six times, before the "Alert: No Internet connection" message disappears and I'm able to open the VPN connection again. Other times, the Wi-Fi alert disappears of its own accord, the exclamation mark clears, and I'm able to connect again. Either way, it can take five minutes or more to get a connection again, which can be frustrating. Why does Wi-Fi report "No internet connection" after losing connectivity, and how can I diagnose this issue and fix it?

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  • Campus VLAN Segmentation - By OS?

    - by Moduspwnens
    We've been thinking through re-arranging our network and VLAN configuration. Here's the situation. We already have our servers, VoIP phones, and printers on their own VLANs, but our problem lies with end user devices. There are just too many to lump on the same VLAN without being hammered with broadcasts! Our current segmentation strategy has them split into VLANs like this: Student iPads Staff iPads Student Macbooks Staff Macbooks Gaming devices Staff (Other) Student (Other) *Note that our network has many more iPads and MacBooks than most. Since the primary reason we're splitting them is just to put them in smaller groups, this has been working for us (for the most part). However, this required our staff to maintain access control lists (MAC addresses) of all devices belonging in these groups. It also has the unfortunate side effect of illogically grouping broadcast traffic. For example, using this setup, students on opposite ends of campus using iPads will share broadcasts, but two devices belonging to the same user (in the same room) will likely be on completely separate VLANs. I feel like there must be a better way of doing this. I've done a lot of research and I'm having trouble finding instances of this kind of segmentation being recommended. The feedback on the most relevant SO question seems to point toward VLAN segmentation by building/physical location. I feel like that makes sense because logically, at least among miscellaneous end users, broadcasts will typically be intended for nearby devices. Are there other campuses/large-scale networks out there segmenting VLANs based on end-system OS? Is this a typical configuration? Would VLAN segmentation based on physical location (or some other criteria) be more effective? EDIT: I've been told that we will soon be able to dynamically determine device OS without maintaining access lists, although I'm not sure how much that affects the answers to the questions.

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