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• How to Bridge Two Ethernet Ports on Mac OS X

  - by Rabarberski

  How can I bridge two wired ethernet interfaces on Mac OS X (e.g. the current MacPro comes with two ethernet ports)? Googling turned up (e.g. this Apple forum post and this openvpn post) that this is fairly easy on Linux (using the brctl command) and under Windows (via Network Connections right-click Bridge Connections), but how is it done under Mac OS X? BTW: There also doesn't seem to be a macport for brctl ('port search brctl' didn't turn up any results) Note: I don't want to have 'internet sharing', which creates a new network (by handing out network addresses in a new range). I want to really 'bridge' two interfaces so to keep the same network subnet.

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• Tunnel into Sonicwall VPN while on Sonicwall wifi?

  - by Patrick Harrington

  Hey all, I am able to hit my company's VPN while I am at home using a dedicated IP with no issue. When I am at work, the VPN we use (a Sonicwall router/VPN/wifi access point), I can get outside internet fine, but am unable to connect to the VPN. I know that the wifi puts me on a different subnet, and when I try to connect to the normal VPN IP it won't work, and a traceroute just times out. Any suggestions? Might there be an internal IP I need to hit while here at work?

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• Can't figure out error in Cisco ASA log "regular translation creation failed for icmp ..."

  - by Martijn Heemels

  Every few seconds our new Cisco ASA 5505 firewall is logging errors that I can't figure out with my limited Cisco experience. Severity Date Time Syslog ID Source IP Destination IP Description 3 Mar 25 2010 17:21:14 305006 8.8.8.8 regular translation creation failed for icmp src inside:10.10.0.200 dst outside:8.8.8.8 (type 3, code 3) 3 Mar 25 2010 17:18:37 305006 8.8.4.4 regular translation creation failed for icmp src inside:10.10.0.200 dst outside:8.8.4.4 (type 3, code 3) The logged inside IP is our internal DNS resolver, and the outside IP's are Google's public DNS servers. ICMP Type 3 Code 3 means "Port Unreachable" Our "outside" interface has a fixed IP and our "inside" interface is in the 10.10.0.0/16 subnet. The 'Inspect DNS' Service Policy is enabled, with the preset DNS inspection map. Furthermore there's an ACL that allows all inbound ICMP on the "outside" interface. I've spent hours trying to figure this one out, so any and all advice is welcome!

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• ISA 2006 refuses VPN DHCP requests as spoofing

  - by Daniel

  I'm running ISA 2006 with PPTP VPN for my AD-controlled network. DHCP is located on the ISA server itself and authentication is done by RADIUS (NPS) located on the DC. Right now my VPN clients can connect, access local DNS, and can ping ISA, the DC, and other clients. Here's where it gets weird. I noticed that despite all this, ipconfig shows the following: PPP adapter North Horizon VPN: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : North Horizon VPN Physical Address. . . . . . . . . : DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 10.42.4.7(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.255 Default Gateway . . . . . . . . . : 0.0.0.0 DNS Servers . . . . . . . . . . . : 10.42.1.10 NetBIOS over Tcpip. . . . . . . . : Enabled So I went over and checked my ISA logs for both DHCP requests and replies, only to find out that my VPN clients are being denied because ISA thinks its a spoof. Here's some relevant information from the log (the VPN subnet is 10.42.4.0/24): Client IP: 10.42.4.6 Destination: 255.255.255.255:67 Client Username: (blank) Protocol: DHCP (request) Action: Denied Connection Rule: (blank) Source Network: VPN Clients Destination Network: Local Host Result Code: 0xc0040014 FWX_E_FWE_SPOOFING_PACKET_DROPPED Network Interface: 10.42.4.11 --------------------------------------------------------- Original Client IP: 10.42.4.6 Destination: 10.42.1.1 Client Username: (valid user) Protocol: PING Action: Initiated Connection Rule: Allow PING to ISA Source Network: VPN Clients Destination Network: Local Host Result Code: 0x0 ERROR_SUCCESS Network Interface: (blank) I wasn't sure what this 10.42.4.11 network interface was - it certainly wasn't something I had setup - untill I saw it in Routing and Remote Access under IP Routing General as an interface called "Internal" bound to the same IP address. I also noticed that since ISA takes blocks of 10 IP addresses from DHCP for VPN, it had reserved 10.42.4.2-11. I'm not sure if it means anything, though. Thanks for your help.

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• debian lenny xen bridge networking problem

  - by Sasha

  DomU isn't talking to the world, but it talks to Dom0. Here are the tests that I made: Dom0 (external networking is working): ping 188.40.96.238 #Which is Domu's ip PING 188.40.96.238 (188.40.96.238) 56(84) bytes of data. 64 bytes from 188.40.96.238: icmp_seq=1 ttl=64 time=0.092 ms DomU: ping 188.40.96.215 #Which is Dom0's ip PING 188.40.96.215 (188.40.96.215) 56(84) bytes of data. 64 bytes from 188.40.96.215: icmp_seq=1 ttl=64 time=0.045 ms ping 188.40.96.193 #Which is the gateway - fail PING 188.40.96.193 (188.40.96.193) 56(84) bytes of data. ^C --- 188.40.96.193 ping statistics --- 2 packets transmitted, 0 received, 100% packet loss, time 1013ms The system is debian lenny with a normal setup. Here is my configs: uname -a Linux green0 2.6.26-2-xen-686 #1 SMP Wed Aug 19 08:47:57 UTC 2009 i686 GNU/Linux cat /etc/xen/green1.cfg |grep -v '#' kernel = '/boot/vmlinuz-2.6.26-2-xen-686' ramdisk = '/boot/initrd.img-2.6.26-2-xen-686' memory = '2000' root = '/dev/xvda2 ro' disk = [ 'file:/home/xen/domains/green1/swap.img,xvda1,w', 'file:/home/xen/domains/green1/disk.img,xvda2,w', ] name = 'green1' vif = [ 'ip=188.40.96.238,mac=00:16:3E:1F:C4:CC' ] on_poweroff = 'destroy' on_reboot = 'restart' on_crash = 'restart' ifconfig eth0 Link encap:Ethernet HWaddr 00:24:21:ef:2f:86 inet addr:188.40.96.215 Bcast:188.40.96.255 Mask:255.255.255.192 inet6 addr: fe80::224:21ff:feef:2f86/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3296 errors:0 dropped:0 overruns:0 frame:0 TX packets:2204 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:262717 (256.5 KiB) TX bytes:330465 (322.7 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) peth0 Link encap:Ethernet HWaddr 00:24:21:ef:2f:86 inet6 addr: fe80::224:21ff:feef:2f86/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:3407 errors:0 dropped:657431448 overruns:0 frame:0 TX packets:2291 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:319941 (312.4 KiB) TX bytes:338423 (330.4 KiB) Interrupt:16 Base address:0x8000 vif2.0 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:27 errors:0 dropped:0 overruns:0 frame:0 TX packets:151 errors:0 dropped:33 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:1164 (1.1 KiB) TX bytes:20974 (20.4 KiB) ip a s 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: peth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:24:21:ef:2f:86 brd ff:ff:ff:ff:ff:ff inet6 fe80::224:21ff:feef:2f86/64 scope link valid_lft forever preferred_lft forever 4: vif0.0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff 5: veth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff 6: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff 7: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff 8: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff 9: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff 10: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff 11: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff 12: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN link/ether 00:24:21:ef:2f:86 brd ff:ff:ff:ff:ff:ff inet 188.40.96.215/26 brd 188.40.96.255 scope global eth0 inet6 fe80::224:21ff:feef:2f86/64 scope link valid_lft forever preferred_lft forever 14: vif2.0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 32 link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff inet6 fe80::fcff:ffff:feff:ffff/64 scope link valid_lft forever preferred_lft forever brctl show bridge name bridge id STP enabled interfaces eth0 8000.002421ef2f86 no peth0 vif2.0 ip r l Dom0: 188.40.96.192/26 dev eth0 proto kernel scope link src 188.40.96.215 default via 188.40.96.193 dev eth0 DomU: 188.40.96.192/26 dev eth0 proto kernel scope link src 188.40.96.238 default via 188.40.96.193 dev eth0

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• Samba: session setup failed: NT_STATUS_LOGON_FAILURE

  - by stivlo

  I tried to set up Samba with "unix password sync", but I still get logon failure. I am running Ubuntu Natty Narwhal. $ smbclient -L localhost Enter stivlo's password: session setup failed: NT_STATUS_LOGON_FAILURE Here is my /etc/samba/smb.conf [global] workgroup = obliquid server string = %h server (Samba, Ubuntu) dns proxy = no log file = /var/log/samba/log.%m max log size = 1000 syslog = 0 panic action = /usr/share/samba/panic-action %d security = user encrypt passwords = true passdb backend = tdbsam obey pam restrictions = yes unix password sync = yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . pam password change = yes map to guest = bad user [www] path = /var/www browsable = yes read only = no create mask = 0755 After modifying I restarted the servers: $ sudo restart smbd $ sudo restart nmbd However I still can't logon with my Unix username and password. Can anyone please help? Thank you in advance!

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• Time Machine + Ubee Router?

  - by Charlie

  I can't for the life of me figure this out. I recently had TWC installed in my house, and wanted to disable the NAT and router functions of it. I have a Time Machine hooked up to it from LAN1 (on the Ubee) to the WAN port on the TM. The problems started occurring here. I figured the settings would be these: Ubee Configuration mode: Bridge DHCP: Off TM IPv4: 192.168.100.2 Subnet Mask: 255.255.255.0 Router Address: 192.168.100.1 DNS Servers: 8.8.8.8, 8.8.4.4 Router Mode: DHCP and NAT But using those settings, my TM says "Double NAT", so I have to change it all around to the default settings of the Ubee using NAT. This leads me to believe bridge mode doesn't actually turn off NAT...

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• Redundancy and Automated failover using Forefront TMG 2010 Standard between Production-DR site ?

  - by Albert Widjaja

  Hi, I'm using MS TMG 2010 Standard as my single firewall to publish my Exchange Server and IIS website to the internet, however it is just one VM in the DMZ network with just one network card (vNIC), what sort of redundancy method that is suitable for making this firewall VM redundant / automatically failover in my DR site ? Because it is very important in the event of disaster recovery all important email through various mobile device will still need to operate and it is impossible if this TMG 2010 VM is offline. is it by using: 1. Multicast NLB 2. Any other clustering 3. VMware HA / FT (one VM in production, the other VM in DR site with different subnet ?) Any suggestion and idea willl be appreciated. Thanks

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• Changing default gateway on workstations connected to Windows Domain SBS server

  - by Gary B2312321321

  We have xp workstations connected onto a small business server acting as active directory/isa firewall/proxy (no dhcp). Is there a reason that after installing a 2nd firewall on the network (same subnet etc), that changing the default gateway on the workstations isnt sufficient to route inet traffic through the new firewall? A freshly setup linux box connects straight on to the alternate firewall with just ip, default gateway. dns settings. Will having ISA still active on the network confuse the process? Are there further config settings deeper down in windows that need attention? Any ideas pointers on this would be appreciated? Other info: Firewalls tried: Smoothwall and Ipcop; small ethernet netwoork 40 pcs; can ping to new firwalls from workstations; activating web proxy on new firewall and reconfiguring workstation browser works fine; Point of 2nd firewall is lack of some necessary features on ISA for a linux app; Would be nice to have some redundancy to though

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• Poor home office network performance and cannot figure out where the issue is

  - by Jeff Willener

  This is the most bizarre issue. I have worked with small to mid size networks for quite a long time and can say I'm comfortable connecting hardware. Where you will start to lose me is with managed switches and firewalls. To start, let me describe my network (sigh, shouldn't but I MUST solve this). 1) Comcast Cable Internet 2) Motorola SURFboard eXtreme Cable Modem. a) Model: SB6120 b) DOCSIS 3.0 and 2.0 support c) IPv4 and IPv6 support 3-A) Cisco Small Business RV220W Wireless N Firewall a) Latest firmware b) Model: RV220W-A-K9-NA c) WAN Port to Modem (2) d) vlan 1: work e) vlan 2: everything else. 3-B) D-Link DIR-615 Draft 802.11 N Wireless Router a) Latest firmware b) WAN Port to Modem (2) 4) Servers connected directly to firewall a) If firewall 3-A, then vlan 1 b) CAT5e patch cables c) Dell PowerEdge 1400SC w/ 10/100 integrated NIC (Domain Controller, DNS, former DHCP) d) Dell PowerEdge 400SC w/ 10/100/1000 integrated NIC (VMWare Server) 4) Linksys EZXS88W unmanaged Workgroup 10/100 Switch a) If firewall 3-A, then vlan 2 b) 25' CAT5e patch cable to firewall (3-A or 3-B) c) Connects xBox 360, Blu-Ray player, PC at TV 5) Office equipment connected directly to firewall a) If firewall 3-A, then vlan 1 b) ~80' CAT6 or CAT5e patch cable to firewall (3-A or 3-B) c) Connects 1) Dell Latitude laptop 10/100/1000 2) Dell Inspiron laptop 10/100 3) Dell Workstation 10/100/1000 (Pristine host, VMWare Workstation 7.x with many bridged VM's) 4) Brother Laser Printer 10/100 5) Epson All-In-One Workforce 310 10/100 5-A) NetGear FS116 unmanaged 10/100 switch a) I've had this switch for a long time and never had issues. 5-B) NetGear GS108 unmanaged 10/100/1000 switch a) Bought new for this issue and returned. 5-C) Linksys SE2500 unmanaged 10/100/1000 switch a) Bought new for this issue and returned. 5-D) TP-Link TL-SG10008D unmanaged 10/100/1000 a) Bought new for this issue and still have. 6) VLan 1 Wireless Connections (on same subnet if 3-B) a) Any of those at 5c b) HP Laptop 7) VLan 2 Wireless Connection (on same subnet if 3-B) a) IPad, IPod b) Compaq Laptop c) Epson Wireless Printer Shew, without hosting a diagram I hope that paints a good picture. The Issue The breakdown here is at item 5. No matter what I do I cannot have a switch at 5 and have to run everything wireless regardless of router. Issues related to using a switch (point 5 above) SpeedTest is good. Poor throughput to other devices if can communicate at all. Usually cannot ping other devices even on the same switch although, when able, ping times are good. Eventual lose of connectivity and can "sometimes" be restored by unplugging everything for several days, not minutes or hours but we're talking a week if at all. Directly connect to computer gives good internet connection however throughput to other devices connected to firewall is at best horrible. Yet printing doesn't seem to be an issue as long as they are connected via wireless. I have to force the RV220W to 1000Mb on the respective port if using a Gig Switch Issues related to using wireless in place of a switch (point 5 above) Poor throughput to other devices if can communicate. SpeedTest is good. Bottom line Internet speeds are awesome. By the way, Comcast went WAY above and beyond to make sure it was not them. They rewired EVERYTHING which did solve internet drops. Computer to computer connections are garbage Cannot get switch at 5 to work, yet other at 4 has never had an issue. Direct connection, bypass switch, is good for DHCP and internet. DNS must be on server, not firewall. Cisco insists its my switches but as you can see I have used four and two different cables with the same result. My gut feeling is something is happening with routing. But I'm not smart enough to know that answer. I run a lot of VM's at 5-c-3, could that cause it? What's different compared to my previous house is I have introduced Gigabit hardware (firewall/switches/computers). Some of my computers might have IPv6 turned on if I haven't turned it off already. I'm truly at a loss and hope anyone has some crazy idea how to solve this. Bottom line, I need a switch in my office behind the firewall. I've changed everything. The real crux is I will find a working solution and, again, after days it will stop working. So this means I cannot isolate if its a computer since I have to use them. Oh and a solution is not throwing more money at this. I'm well into $1k already. Yah, lame.

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• Windows Media Center says "Searching for tuners" when I try to play live TV

  - by Louis

  After upgrading from Windows 8 Pro with Media Center to the 8.1 preview, I need some help in being able to watch live TV again. When I try to now, it says Please Wait. Searching for tuners. I tried reinstalling the software for the Hauppauge WinTV DCR-2650 TV tuner, and upgrading the firmware for both the tuner and the Cisco STA-1520 tuning adapter. I also tried swapping around the USB ports, cold-booting the devices, and running the Set Up TV Signal setting in WMC, but that says The TV signal cannot be configured because a TV tuner was not detected. Both devices look fine in Device Manager, reporting the "This device is working properly" status. I'm not sure if this is related, but I did have some network connectivity issues immediately after upgrading to Windows 8.1 where my either my subnet mask or default gateway was missing, and since the TV tuner shows up as a network device, I wonder if that might be related. However, I really don't know how those settings should look and Hyper-V sort of further complicates things with the virtual Ethernet adapters:

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• Forcing DFS replication on Windows 2003 Web Edition SP2

  - by Greg B

  I have a pair of web servers running Windows Server 2003 Web Edition SP2 (build 3790). There servers are a on a Gigabit LAN and are on the same subnet. I created a new link on the 1st server and added the second box as a target to the link. I configured replication as ring. The 2nd server gets some of the files on the scheduled replication but this varies wildly which makes me think it's not running fully. The folder on server 1 is 1.3GB. Is there some way I can force repication (from a console?) and monitor the progress and see if/when/why it fails.

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• pslist causes security audit log failure on non-administrative user account

  - by Woot4Moo

  The user has RX privs. This event consistently arises in the security logs. How can this be resolved? Or what is the underlying issue here? Some additional information the user has local login disabled and log on as a service enabled. Failure Audit Category: Object Access Event ID 560 Object Server: Security Object Type: File Object Name: Pg_control Image File Name: xx/xx/xx/xx postgres.exe Primary User name: my_User Object Open: Object Server: Security Object Type: Key Object Name: \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Performance Handle ID: - Operation ID: {0,26727190} Process ID: 2492 Image File Name: C:\Program Files\tomcat\webapps\myApp\bin\win32\pslist.exe Primary User Name: my_user Primary Domain: KFHFTZ03 Primary Logon ID: (0x0,0x178D9) Client User Name: - Client Domain: - Client Logon ID: - Accesses: READ_CONTROL Query key value Set key value Create sub-key Enumerate sub-keys Notify about changes to keys Privileges: - Restricted Sid Count: 0 Access Mask: 0x2001

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• How to troubleshoot a remote wmi query/access failure?

  - by Roman

  Hi I'm using Powershell to query a remote computer in a domain for a wmi object, eg: "gwmi -computer test -class win32_bios". I get this error message: Value does not fall within the expected range Executing the query local under the same user works fine. It seems to happen on both windows 2003 and also 2008 systems. The user that runs the shell has admin rights on the local and remote server. I checked wmi and dcom permissions as far as I know how to do this, they seem to be the same on a server where it works, and another where it does not. I think it is not a network issue, all ports are open that are needed, and it also happens within the same subnet. When sniffing the traffic we see the following errors: RPC: c/o Alter Cont Resp: Call=0x2 Assoc Grp=0x4E4E Xmit=0x16D0 Recv=0x16D0 Warning: GssAPIMechanism is not found, either caused by not reassembled, conversation off or filtering. And an errormessage from Kerberos: Kerberos: KRB_ERROR - KDC_ERR_BADOPTION (13) The option code in the packet is 0x40830000 Any idea what I should look into?

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• Sonicwall networking

  - by Syed

  My Sonicwall LAN subnet is 192.168.1.0/24 X0: LAN IP 192.168.1.253 I also have intranet router 192.168.1.108 routing to 192.168.2.0/24 network. Internet is through WAN (X1) is all working fine. My LAN PC's can connect to intranet 192.168.2.0/24 via static route from LANsubnet to 192.168.2.0/24 as 192.168.1.108 as gateway. Now I have LAN2 10.2.1.254 (10.2.1.0/24)on X4 port. I can access Internet from LAN2, now I want to allow intranet from LAN2. What static routes do I need to make this work?

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• Static route in conflict with a default route

  - by Ossan Sokiv

  Hi guys, I have a default route configured. 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.1 I'd like to add a static route to pass traffic destined for 192.168.1.51 via a load balancer's redundant virtual interface at 192.168.1.2. ip route add 192.168.1.51 mask 255.255.255.255 via 192.168.1.2 When I try to add the static route I get this error. Error: either "to" is duplicate or "default" is garbage." It doesn't want to add the static route because it's in conflict with the default route. Is there a way around this? Regards Ossan

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• Watchguard firebox: public IP addresses behind firewall with as much usable IP addresses as possible

  - by martinezpt

  Our ISP assigned us 16 public IP addresses that we want to assign to hosts behind a Watchguard firebox x750e. The IP addresses are: x.x.x.176/28 of which x.x.x.177 is the gateway. The hosts will be running software that needs to be directly assigned the public IP address so 1:1 NAT is not an option. I found this document that gives examples on how to assign public IP addresses to hosts behind the firewall, using an optional interface: http://www.watchguard.com/help/configuration-examples/public_IP_behind_XTM_configuration_example_(en-US).pdf However, I can't implement scenario 1 as it won't allow me to use the same subnet on both interfaces. As for scenario 2, splitting the address range into 2 subnets will decrease the usable hosts on the optional interface to 5 (8 - network - broadcast - optional interface ip). I'm convinced that there must be a better way to address this problem and maximize the number of usable IP addresses but I'm not very familiar with this specific firewall. Are there any suggestions on how to keep the hosts behind the firewall with public IP addresses while maximizing the usable IP addresses? thanks

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• Connectivity good between VMs, but no connectivity between host and VM

  - by Greg Sansom

  I have a strange situation where connectivity (ie ping, access shared folders and services) is fine between virtual machines, but not between the host and the virtuals. I've been using Hyper-V almost every day for years and have never had a problem like this. Note the following: The host machine and all virtuals are running Windows Server 2008 r1. All machines can connect to the web, and the gateway router. Subnet mask and gateway reported in ipconfig are identical for all machines. I can access virtuals via the Hyper-V snap-in only. Doea anyone have suggestions about what might be wrong, or what diagnostic steps I can take?

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• VM can’t connect to outside in bridged mode

  - by Kamal

  Hi Guys, I am not able to ping any machine(not even the host) from Guest VM in bridged mode. But I got an IP which is on the same subnet as host. I can ping my guest VM from the host and can use ssh to connect to the guest. I am using Vmware workstation 6.5. Guest VM is a centos VM and host is windows xp. Every thing works fine in NAT mode. Any clues as to what could be happening. I tried disabling all the firewalls I have. My virtual network editor shows that my ethernet adapter(the one my host uses) is used for bridging. It is connected. I don't understand how I can get an IP address from DHCP server. I can't ping any of the DNS servers in generated /etc/resolv.conf which are the same as that of my host

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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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• Is this a common/bug on this PPPoE setting for Cisco ASA 5505?

  - by DCAlliances

  We have to change the way the firewall setup due to we've changed the internet provider. The way we setup we have ADSL modem and we have to do a full bridge mode and the firewall configuration has to change from Static IP to Use PPPoE option on Outside interface with PPPoE username and password, CHAP authentication, WAN IP and WAN subnet mask. [See the attachment] It's been working ok with the use of PPPoE option however the issue is that if we un-plug the power cable of the firewall. This "Outside" interface turned to blank - NO WAN IP, PPPoE username and password. So basically, we have to retype this information again. Is this common or a bug? Any ideas? Thanks

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• CentOS - massive usage on loopback interface

  - by Matthew Iselin

  Hi, I have a CentOS installation which is running fairly smoothly. Today I ran ifconfig mainly to see what sort of usage has been coming across the ethernet interface, and to also check my link speed. This is what I ended up seeing for the loopback device: lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:10301085132061223274 errors:0 dropped:0 overruns:0 frame:0 TX packets:13981054163812689233 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11783901785008000095 (0.6 EiB) TX bytes:10333501021200548281 (0.9 EiB) This just feels completely wrong - almost an EiB of data? Any assistance in tracking down the source of these statistics would be greatly appreciated.

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• Accessing IPv6 router interface from a minimal Fedora installation?

  - by Zack

  I've recently installed Fedora 16 and am trying to set up a simple apache server. The only problem I've run into so far is that I'm unable to access my router's web interface from any box on my network. It assigns addresses via dhcp, and the router always responds to a ping. The server is also picking up an IP from the router on the proper subnet. Now, all I really need to do is forward a port, however I am receiving "Unable to connect" through the web interfaces and "connection refused" via telnet. What are my options, and how might I go about troubleshooting this? Will I need the server's ip to be static in order to change these settings? The router is a "Netopia" model, if that helps.

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• setup Mac Book Wifi interface as Wifi hotspot using specific DHCP option

  - by srjohnhuang

  I want to using my Mac Book as an access point. Besides that I also need to configure its DHCP server to not provide DNS info. For example, Mac Books AP's ssid is "MacBookHotspot". While my iPhone connected to "MacBookHotspot", I want the Wifi info displayed my iPhone would be looked like: IP ADDRESS DHCP(tab) IP Address 192.168.0.1 Subnet Mask 255.255.255.0 Router 192.168.0.254 DNS Search Domains Client ID (key point: DNS filed is blank) Does anyone have any good suggestion? Thanks!

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• DrayTek Vigor 2920(n): VPN with VLAN restrictions?

  - by Dirk

  Hi, I'm currently installing a DrayTek Vigor 2920n router in a new office. This router is to be used for 2 seperate companies. For one of these companies, the router has a LAN-2-LAN (VPN) connection to a datacenter configured. The other company should not be able to access this other (VPN-)network. I'm aware of the capability of this router to have VLAN's, but I cannot figure out how to configure the VPN-connection to only be accessible for VLAN0 and not for VLAN1. I know I can also add another router to physically split both networks, but we bought the DrayTek with the idea that it could easily have the VPN-connection available for VLAN0 and not for VLAN1. VLAN1 can easily be in another subnet, that's fine, although, I don't know how to configure that on this DrayTek. Can anyone point me in the right direction? Thanks in advance, Dirk

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