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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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• custom route not working on windows

  - by Michael Closson

  My windows laptop is directly connected to 192.168.1.0/24 (wireless lan). I access 10.21.0.0/16 though a router that is connected to both networks. The routing works fine with this configuration. I have a VPN, that connects to 10.0.0.0/8. The VPN network doesn't actually use any IPs in the 10.21.0.0/16 range. So I should be able to configure my routing table to route all the 10.21.0.0/16 IPs through the wireless lan, and all other 10.0.0.0/8 through the VPN. My understanding is that I can do this if the metric for the 10.21.0.0 is lower than that of the 10.0.0.0. The VPN (10.0.0.0) is automatically assigned metric 20. I have manually assigned the WLAN a metric of 1. I manually add an entry to the routing table with this command: route add 10.21.0.0 mask 255.255.0.0 192.168.1.201 metric 1 The route is then assigned a metric of 2 (which is expected). The problem is that it doesn't work. I can't ping any machine on the 10.21.0.0 network. But I can access other stuff on the 10.0.0.0. I can also access stuff on the 192.168.1.0. To debug this i've done the following. Run tcpdump on the router (192.168.1.201). I can verify that no packets for 10.21.0.0 arrive on that interface. Disable iptables on the router. Disable the windows firewall. Run wireshark on my laptop, to try and see which interface the ping requests go to. But I can't see them go anywhere!! The ping command doesn't receive any 'destination unreachable' messages. Here is the relevant section of the routing table. IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.201 192.168.1.18 2 10.0.0.0 255.0.0.0 On-link 10.55.44.203 20 10.21.0.0 255.255.0.0 192.168.1.201 192.168.1.18 2

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• iMac G5 20" (First All-In-One White Screen) Cannot Connect To Internet

  - by Goober

  The Scenario I've got an iMac G5 20" (First All-In-One White Screen) PPC. It has an Airport Extreme Network card in order to wirelessly to connect to the internet. For the most part I connect using ethernet as opposed to wirelessly, but recently have had the need to connect using the wireless. The Hardware BT Home Broadband Wireless Router. iMac G5 20" From about 5 years ago (First All-In-One White Screen) The Issue Even though I know for a fact that It has connected to the internet wireslessly in the past, for some reason it can discover the wireless router, but upon entering the password it fails to connect. I have tried multiple times to no avail. I have 2 other Mac's on the network and a pc that can all connect wirelessly. However both the mac's. Question Any ideas as to why my really old iMac G5 can't connect wirelessly anymore!?

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• Using airport extreme base station as a wireless G to wireless N bridge

  - by micmcg

  Due to unfortunate placement of various wall outlets in my new apartment, my adsl 2 modem + router is not able to be placed next to my airport extreme base station (AEBS). I'd prefer not to run cat5 cable between them, but I still want to use the wireless N on the AEBS, because it will have a high speed NAS plugged in via gigabit ethernet so I want to maximise the wireless transfer speed to my 27" iMac. Is it possible to use one of the radios in the airport extreme to bridge the wireless G network with the router, and the wireless N radio to broadcast normally? The only traffic going over the G network should be internet (24mbps ADSL2) so it should never get saturated. Thanks

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• Connecting together DIR-615 and DIR-655

  - by ra170

  On my DIR-655 my internal network is: 192.168.0.x On my DIR-615 my internal network is: 192.168.1.x They are both connected to my firewall PIX 501 box The PIX itself is connected to the comcast modem. I briefly looked at the menu options on those router and they look similar, however I'm not sure what's the best way to connect those two together so that I can go between those networks. (printing, file browsing, etc.) I'm not sure if I have to do this somehow on those two router or on the PIX itself, or probably on all of them. If anyone has experience with something like that please let me know..

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• Forwarding udp ports iptables packets "lost"?

  - by Dindihi

  I have a Linux router (Debian 6.x) where i forward some ports to internal services. Some tcp ports (like 80, 22...) are OK. I have one Application listening on port 54277udp. No return is coming from this app, i only get Data on this port. Router: cat /proc/sys/net/ipv4/conf/all/rp_filter = 1 cat /proc/sys/net/ipv4/conf/eth0/forwarding = 1 cat /proc/sys/net/ipv4/conf/ppp0/forwarding = 1 $IPTABLES -t nat -I PREROUTING -p udp -i ppp0 --dport 54277 -j DNAT --to-destination $SRV_IP:54277 $IPTABLES -I FORWARD -p udp -d $SRV_IP --dport 54277 -j ACCEPT Also MASQUERADING internal traffic to ppp0(internet) is active & working. Default Policy INPUT&OUTPUT&FORWARD is DROP What is strange, when i do: tcpdump -p -vvvv -i ppp0 port 54277 I get a lot of traffic: 18:35:43.646133 IP (tos 0x0, ttl 57, id 0, offset 0, flags [DF], proto UDP (17), length 57) source.ip > own.external.ip..54277: [udp sum ok] UDP, length 29 18:35:43.652301 IP (tos 0x0, ttl 57, id 0, offset 0, flags [DF], proto UDP (17), length 57) source.ip > own.external.ip..54277: [udp sum ok] UDP, length 29 18:35:43.653324 IP (tos 0x0, ttl 57, id 0, offset 0, flags [DF], proto UDP (17), length 57) source.ip > own.external.ip..54277: [udp sum ok] UDP, length 29 18:35:43.655795 IP (tos 0x0, ttl 57, id 0, offset 0, flags [DF], proto UDP (17), length 57) source.ip > own.external.ip..54277: [udp sum ok] UDP, length 29 18:35:43.656727 IP (tos 0x0, ttl 57, id 0, offset 0, flags [DF], proto UDP (17), length 57) source.ip > own.external.ip..54277: [udp sum ok] UDP, length 29 18:35:43.659719 IP (tos 0x0, ttl 57, id 0, offset 0, flags [DF], proto UDP (17), length 57) source.ip > own.external.ip..54277: [udp sum ok] UDP, length 29 tcpdump -p -i eth0 port 54277 (on the same machine, the router) i get much less traffic. also on the destination $SRV_IP there are only a few packets coming in, but not all. INTERNAL SERVER: 19:15:30.039663 IP source.ip.52394 > 192.168.215.4.54277: UDP, length 16 19:15:30.276112 IP source.ip.52394 > 192.168.215.4.54277: UDP, length 16 19:15:30.726048 IP source.ip.52394 > 192.168.215.4.54277: UDP, length 16 So some udp ports are "ignored/dropped" ? Any idea what could be wrong? Edit: This is strange: The Forward rule has data packets, but the PREROUTING rule has 0 packets... iptables -nvL -t filter |grep 54277 Chain FORWARD (policy DROP 0 packets, 0 bytes) 168 8401 ACCEPT udp -- * * 0.0.0.0/0 192.168.215.4 state NEW,RELATED,ESTABLISHED udp dpt:54277 iptables -nvL -t nat |grep 54277 Chain PREROUTING (policy ACCEPT 405 packets, 24360 bytes) 0 0 DNAT udp -- ppp0 * 0.0.0.0/0 my.external.ip udp dpt:54277 state NEW,RELATED,ESTABLISHED to:192.168.215.4

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• Cablemodem frequent connection loss

  - by LVDave

  I have a Linksys BEFCMU10 cablemodem and a WRT54GL router with Tomato 1.27 firmware on Cox cable. My question is this: I get what seems to be random disconnects from the internet, where the cable modem lights are still normal, but I can connect nowhere, either via a url or an ip address. At the same time these disconnects are happening, I can go to the router's Tomato management webpage, and release/renew my external IP address from Cox's DHCP server. I've had Cox look at the signal levels on the cable modem, and they say they look fine. What brings back the modem, for sometimes as long as 17 days, is several power-cycles of the modem. I don't understand the underlying cable modem technology too well, but I do know that if I'm able to release/renew the DHCP-provided WAN address, I'd expect that the cable modem was working ok... Anybody have any ideas??

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• Dual mode 802.11n PCI adapters

  - by Mike Thompson

  I have recently bought a DLink DIR-825 router. It is a dual mode (2.4GZ & 5GHZ) 802.11n wireless access point/router. What is a good PCI adapter to pair with it? DLink appear to only make one dual mode adapter, which is the DWA-160 USB adapter. They don't seem to have a PCI adapter in their range, which seems very strange. Do any of the other network manufacturers make a good dual mode adapter?

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• Windows Deployment Services

  - by timbrigham

  I have a slightly advanced Windows Deployment Services setup. My router hands out DHCP addresses, including the following config. ip dhcp pool Servers_100 network 192.168.100.0 255.255.255.0 bootfile boot\\x86\\pxelinux.0 next-server 192.168.100.50 default-router 192.168.100.1 dns-server 192.168.100.80 192.168.100.81 This works perfectly for other subnets - I have a couple screens in my pxelinux that allow me to select my various Linux installers or enter the windows preboot environment. For some reason I'm only receiving the default bootfile that opens to the windows preboot environment. Any idea why?

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• Windows Vista: Networking can only connect "local only"

  - by Damien

  I am attempting to debug a problem on a Windows Vista laptop - not mine! Until just recently (last week or so), it was operating normally for about 4 years :) The problem is that I am having issues connecting to the local network (a basic wireless home router; more later) and the internet (via ADSL). This is both for wired [Broadcom chipset] and wireless [Intel chipset]. I will elaborate further later. To detail the network. I have three other clients (HTC phone, Ubuntu 12.04 desktop [wired] and Ubuntu 10.04 laptop [wireless]), all of whom are able to connect to the network and internet normally. A windows 7 virtual machine running on said desktop connects normally. I have tried two different wireless routers - Netgear DG834G and Netgear DGN3500. The same error mode is common to both. Updating the firmware to the latest on both routers does not help. Overall, it seems safe to say it's localised to the laptop in question. I do not have another Vista client to test with. The specific symptoms are as follows: When "connected", it says "Local Only", and says it cannot connect to the internet. This is true for both wired and wireless. It can get an IP address (192.168.0.5), and the router (192.168.0.1) reports that it can see the device. When I try to ping, I get the following results: ping 192.168.0.1 - (router) all packets lost ping 192.168.0.5 - (laptop's address) OK ping 192.168.0.4 - (desktop) all packets lost Pinging from the desktop to the problematic laptop results in "From 192.168.0.4 icmp_seq=1 Destination Host Unreachable" The most promising "fix" from trawling forums is KB928233 which does not work for me. The problem is persistent across reports (both full shutdown and hibernate) so it appears not to be sleep related. I am not a regular vista user, though I can fumble my way about a bit. Is there any other suggestions as to what I should do? Is there any further information I can provide?

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• How to Make Red zone Network settings to Endian OS

  - by Gash

  Please help me, Currently we have about 10 pc's sharing internet. and We have CISCO 800 series router that connect the ADSL, to the lan Segment it connect switch throw the switch all pc's are getting connecting. all user pc's having 192.168.3.--- range ips and gateway is 192.168.3.254 now i install the endian firewall to one PC, it must work as firewall,VPN & proxy i made green zone ip as 192.168.3.222 then how to give red zone IP? i know that is static IP but it cant be same range so please help me out to sort this without changing anything in router, if want i can change the internal IP sets instead of 3.-- 10.-- or something like that and also please state me at present i tried Endian firewall red and green zone cables are pluged in to network switch only please help me to overcome this its urgent

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• How do I protect a low budget network from rogue DHCP servers?

  - by Kenned

  I am helping a friend manage a shared internet connection in an apartment buildling with 80 apartments - 8 stairways with 10 apartments in each. The network is laid out with the internet router at one end of the building, connected to a cheap non-managed 16 port switch in the first stairway where the first 10 apartments are also connected. One port is connected to another 16 port cheapo switch in the next stairway, where those 10 apartments are connected, and so forth. Sort of a daisy chain of switches, with 10 apartments as spokes on each "daisy". The building is a U-shape, approximately 50 x 50 meters, 20 meters high - so from the router to the farthest apartment it’s probably around 200 meters including up-and-down stairways. We have a fair bit of problems with people hooking up wifi-routers the wrong way, creating rogue DHCP servers which interrupt large groups of the users and we wish to solve this problem by making the network smarter (instead of doing a physical unplugging binary search). With my limited networking skills, I see two ways - DHCP-snooping or splitting the entire network into separate VLANS for each apartment. Separate VLANS gives each apartment their own private connection to the router, while DHCP snooping will still allow LAN gaming and file sharing. Will DHCP snooping work with this kind of network topology, or does that rely on the network being in a proper hub-and-spoke-configuration? I am not sure if there are different levels of DHCP snooping - say like expensive Cisco switches will do anything, but inexpensive ones like TP-Link, D-Link or Netgear will only do it in certain topologies? And will basic VLAN support be good enough for this topology? I guess even cheap managed switches can tag traffic from each port with it’s own VLAN tag, but when the next switch in the daisy chain receives the packet on it’s “downlink” port, wouldn’t it strip or replace the VLAN tag with it’s own trunk-tag (or whatever the name is for the backbone traffic). Money is tight, and I don’t think we can afford professional grade Cisco (I have been campaigning for this for years), so I’d love some advice on which solution has the best support on low-end network equipment and if there are some specific models that are recommended? For instance low-end HP switches or even budget brands like TP-Link, D-Link etc. If I have overlooked another way to solve this problem it is due to my lack of knowledge. :)

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• Components needed for a VPN

  - by Anriëtte Combrink

  Hi there, first of all, I asked this question on SuperUser.com, but no one there could help me. Well, 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]), we currently use this as our internet connection and resides X.X.0.1 on our network. 4Mbps ADSL connection (Should this line have VPN capability enabled by the service provider?) 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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• ubuntu mail server settings and /etc/hosts file

  - by mbrc

  This is my /etc/hosts file 127.0.0.1 localhost.localdomain localhost 127.0.1.1 ubuntu-server.xx.com ubuntu-server 193.77.xx.xx mail.xx.com mail # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters is this correct configuration for my mail server. I am behind router so i don't know if is ok to use my IP for mail.xx.com and 127.0.0.1 for localhost problem is that i can receive mail but when i send it i get Oct 17 21:29:32 ubuntu-server postfix/smtpd[2453]: warning: SASL authentication failure: Password verification failed Oct 17 21:29:32 ubuntu-server postfix/smtpd[2453]: warning: my.router[192.168.1.1]: SASL PLAIN authentication failed: authentication failure Oct 17 21:29:34 ubuntu-server postfix/smtpd[2453]: warning: my.router[192.168.1.1]: SASL LOGIN authentication failed: authentication failure EDIT: mabye is problem some port. i foward this ports. POP3 - port 110 IMAP - port 143 SMTP - port 25 HTTP - port 80 Secure SMTP (SSMTP) - port 465 Secure IMAP (IMAP4-SSL) - port 585 StartTLS - port 587 IMAP4 over SSL (IMAPS) - port 993 Secure POP3 (SSL-POP) - port 995 postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix content_filter = amavis:[127.0.0.1]:10024 delay_warning_time = 4h disable_vrfy_command = yes inet_interfaces = all inet_protocols = all mailbox_size_limit = 0 maximal_backoff_time = 8000s maximal_queue_lifetime = 7d message_size_limit = 0 minimal_backoff_time = 1000s mydestination = myhostname = mail.xx.com mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mynetworks_style = host myorigin = /etc/mailname readme_directory = no receive_override_options = no_address_mappings recipient_delimiter = + relayhost = smtp_helo_timeout = 60s smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name smtpd_client_restrictions = reject_rbl_client sbl.spamhaus.org, reject_rbl_client blackholes.easynet.nl, reject_rbl_client dnsbl.njabl.org smtpd_data_restrictions = reject_unauth_pipelining smtpd_delay_reject = yes smtpd_hard_error_limit = 12 smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, warn_if_reject reject_non_fqdn_hostname, reject_invalid_hostname, permit smtpd_recipient_limit = 16 smtpd_recipient_restrictions = reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unauth_destination, permit smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = smtpd_sasl_security_options = noanonymous smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, warn_if_reject reject_non_fqdn_sender, reject_unknown_sender_domain, reject_unauth_pipelining, permit smtpd_soft_error_limit = 3 smtpd_tls_cert_file = /etc/ssl/private/mail.xx.com.crt smtpd_tls_key_file = /etc/ssl/private/mail.xx.com.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes unknown_local_recipient_reject_code = 450 virtual_alias_maps = mysql:/etc/postfix/maps/alias.cf virtual_gid_maps = static:5000 virtual_mailbox_base = /var/spool/mail/virtual virtual_mailbox_domains = mysql:/etc/postfix/maps/domain.cf virtual_mailbox_limit = 0 virtual_mailbox_maps = mysql:/etc/postfix/maps/user.cf virtual_uid_maps = static:5000 saslfinger -c version: 1.0.4ostfix Cyrus sasl configuration Ä mode: client-side SMTP AUTH -- basics -- Postfix: 2.9.3 System: Ubuntu 12.04.1 LTS \n \l -- smtp is linked to -- libsasl2.so.2 => /usr/lib/i386-linux-gnu/libsasl2.so.2 (0x00d3a000) -- active SMTP AUTH and TLS parameters for smtp -- relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes -- listing of /usr/lib/sasl2 -- total 28 drwxr-xr-x 2 root root 4096 okt 14 15:18 . drwxr-xr-x 72 root root 12288 okt 14 15:03 .. -rw-r--r-- 1 root root 1 maj 4 06:17 berkeley_db.txt -rw-r----- 1 root root 701 okt 14 15:18 saslpasswd.conf -rw-r----- 1 smmta smmsp 885 okt 14 15:18 Sendmail.conf -- listing of /etc/postfix/sasl -- total 12 drwxr-xr-x 2 root root 4096 okt 11 18:55 . drwxr-xr-x 4 root root 4096 okt 12 06:59 .. -rwx------ 1 root root 241 okt 11 18:55 smtpd.conf Cannot find the smtp_sasl_password_maps parameter in main.cf. Client-side SMTP AUTH cannot work without this parameter!

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• Using a Netgear WGR614v9 to extend wireless signal from Netgear DG934GT

  - by moorcroft

  I'm wondering if someone could please provide me the steps for extending/repeating my wirless signal so that I can have greater wireless range throughout my house. I have 2 wirless Netgear routers, a DG934GT ADSL router (base unit) and WGR614v9 cable router (repeater). I've flashed both routers with the latest firmware and have turned on the wireless repeating function in the WGR614v9 but I can't get internet access when connected to the repeater, I can only get it when connected to the base unit. Can this be achieved by running an ethernet cable between the two routers as thus far I've only tried to get them to contact each other wirelessly. Any help would be appreciated

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• Vista machine hardwired cannot see xp laptop on wireless

  - by Kahega

  I have a laptop with windows xp, connected to my wireless router. I am trying to view the shared files on the laptop with my vista desktop computer. The desktop computer is hardwired to the same router. I can see the desktop pc fine on the xp laptop, and view the shared folders. I cannot see the xp laptop when on the desktop pc. I have tried installing the link update for xp, that is not the issue. I have also tried turning off firewalls, no dice. I have scoured google for this issue, and do not see any resolutions. Any suggestions would be appreciated.

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• Windows 8 Pro Remote Desktop issue

  - by Mike C.

  I have a weird issue here. I'm running Windows 8 Pro. The client computer is also running Windows 8 Pro. Remote Desktop works when I'm in the same network. I tried connecting using my external IP Address and my DynDNS account, neither works. I disabled Windows Firewall and setup DMZ for my computer on the router, still can't get remote desktop to work. I verified www.canyouseeme.org, port 3389 is open, which is obvious since I'm running DMZ! My ISP, Bell Canada (modem/router: Sagemcom F@st 2864), blocks port 80 and 25, but I don't need those for RDP, do I? The funny thing is RDP rejects the connection instantaneously for my IP or DynDNS while it takes a while for another address. Thank you, Michael

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• How do I increase my home's bandwidth?

  - by Derek

  I just mistakingly posted this on Stack Exchange but don't know how to delete it... Anyway, I was thinking of building a home server to use instead of renting a VPS, because in the long run it would be cheaper. What I'm concerned with is the bandwidth limit of my house. I know when I'm downloading something off the internet, if I download at high speeds the rest of the computers connected to my router will become slower. Is there any way to avoid this? There are other cable outlets in my house, will connecting a modem and router there avoid this problem?

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• UDP packets to IP addresses other than specific ones not arriving and not shown in Wireshark

  - by Max

  I'm writing a service using UDP, but I can't manage to reply to the client. When sending to the client via the DHCP-assigned IP (192.168.1.143) Wireshark shows no sent packets. The server receives and Wireshark shows any packet sent by the client (broadcasted). If I send to a random, unassigned IP Wireshark doesn't show it. I thought the NIC would happily send it, since there is a router in the way - shouldn't Wireshark show it, even though it cannot possibly be received by a remote endpoint? If I send to either the router IP or another (specific, there is only one other) computer, the packet is shown in Wireshark. I am running Windows 7, the firewall is turned off using the control panel. Does the fact that wireshark doesn't show these packets mean that they aren't sent? What reason could there be for showing packets to one IP, but not another, on the same subnet?

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• I can't externally access my home server's wordpress website

  - by piratepartypumpkin

  Basically, I can access everything just fine using 127.0.0.1, but if I use my external IP (123.123.123.123), I get page not found. My router is port forwarding HTTP port 80 to port 8080 on my servers internal IP address. In other words: (Application: HTTP | Start: 80 | End: 8080 | Protocol: Both | IP Address 192.168.0.101 | Enable [YES]) I know it's forwarding properly, because when I stop port forwarding, I can access my router page by using my external IP. My virtual hosts file is: NameVirtualHost *:80 <VirtualHost *:80> DocumentRoot /opt/lampstack-5.3.16-0/apps/wordpress ServerName example.com ServerAlias www.example.com </VirtualHost> and my httpd.conf file is: Listen 80 Servername localhost:80 DocumentRoot "/opt/lampstack-5.3.16-0/apache2/htdocs <Directory /> Options FollowSymLinks AllowOverride None Order deny, allow deny from all </Directory> <Directory "/opt/lampstack-5.3.16-0/apache2/htdocs"> Options FollowSymLinks AllowOverride None Order allow, deny allow from all </Directory>

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• VPN Network intermittantly fails to provide internet: What could be possible causes

  - by Jake M

  We have a small office with our own VPN setup. We occasionally experience failures in our internet connection where we cannot access the internet. Most of the time the internet connection will resume by itself(without me doing anything) after a period of time(10 mins). Would you be able to suggest possible causes of the connection failure so I can then go and run some tests? Our network architecture is like so: A 'Billion' brand router that is connected to the internet via phone cable and then connected to our Cisco Switch A Cisco Switch/Bus which is connected to all our office nodes, our external harddrive and also to our router as stated above. All connections are via ethernet cable A series of work computers(nodes) connected via ethernet cable to the Cisco switch. Our ISP is TPG Australia We have a Virtual Private Network All the ethernet cables are about 3 years old Do you think that the causes of our intermittant connection problems could be due to the following: Data collisions in the ethernet cables Old/Faulty ethernet cables Our ISP has bad service Can you think of any other causes of the problem?

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• IPv6 static routes

  - by user98651

  I am looking to configure a few hosts with IPv6 on my network. The router (running CentOS 5) is configured with an Hurricane Electric (HE) tunnel which works fine on that host. However, I would like to statically add a few additional hosts on the same LAN to have IPv6 through this tunnel. No, I don't want radvd or dhcpv6 to do the work for me in this case. I already have IPv6 forwarding enabled in sysctl.conf. I am looking for help with the next steps (statically adding the routes). Lets say the IP addresses are as follows: Router: 2001:470:1b07:1:: Host1: 2001:470:1b07:2:: How would I go about making them see each other? Thanks in advance for the help.

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• Microsoft Office 2007

  - by nardone25

  Hello everyone in serverfault. I am having a big problem at my job. I will let everyone know what I am using. I have two ibm x3690 servers with vmware esxi on both. Our product server has 8 vm on there. I have two lefthand san from HP. I have a watchgurd firewall. Our other site. I have one server over there ibm x3b90 sever. with one vm on there. I have a cisco 1700 router. and another watchgurd firewall. I have a vpn tunnel to my watchgurd firewall, to my cisco router. Site one works great. site two is having problems saving word documents and having problems printing in publisher 2007. Can someone please help?

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• DNS servers via RA in IPv6

  - by glglgl

  Some time ago, RFC 6106 was created, which states how a router tells the clients about the DNS server to be used. It is a new standard, it has to be implemented, which needs time etc. I'm courious about the need for it: wouldn't have it been better to define a "globally valid" anycast address for DNS? Queries would be sent to this address and would be promoted along the default route until there is a host which claims to be responsible for it. In an enterprise network, that would be a central DNS server (or even more, on really big companies); in a SOHO network, it would either be the router or the DNS server of the ISP, in a root server hosting data center, it would be the DNS of the hoster, etc. What do I see wrong here? Do I have a wrong view of the anycast concept?

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• Good way to run commands on remote computer without its own public-facing IP address (Linux Centos)

  - by Chris Dutrow

  Have a few computers running Linux Centos 6.4. They are connected to an unmanaged switch, which in turn, is connected to a router (Verzion Fios issue). What is a good way to "log in" to one of the computers so that I can run commands? Do I need to use SSH, or something different? Since the computers do not have their own public-facing IP addresses, do I need to set up some kind of port forwarding within the router? What is a simple, reliable way to accomplish this? Thanks so much!

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