Network Break 105: Infoblox Bought; Cisco, Salesforce Team Up
Todays Network Break discusses the Infloblox acquisition, a partnership between Cisco & Salesforce on collaboration & IoT, a new OpenDaylight SDN controller, & more The post Network Break 105: Infoblox Bought; Cisco, Salesforce Team Up appeared first on Packet Pushers.Auto-Adding Routes When Mac PPTP Connection Comes Up
Before you read this post, understand that PPTP is insecure. Don’t use PPTP to create a VPN to anything you care about.
TL;DR
Skip to Solution #3.
Problem
When successfully making a PPTP connection to a remote VPN server with the built-in Mac OS X client, you find that you can’t connect to hosts on the other side of the VPN tunnel. You can still connect to the Internet and LAN hosts.
The root issue is that, by default, OS X has no reason to send traffic across the VPN tunnel. A reason must be provided.
Solution #1 – Setting Service Order
In System Preferences > Network, perform “Set Service Order” (the drop down gear icon), and move the PPTP connection to the top of the list.
This means that when the PPTP tunnel is up, traffic will flow through it before other network connections. This will gain you access to hosts on the other side of the VPN tunnel. It will also break everything else, unless the network on the other side of the PPTP tunnel can also service your Internet traffic. This is going to be a function of the VPN termination device as well as the firewall configuration at the remote site.
The issue here Continue reading
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snaproute Go BGP Code Dive (11): Moving to Open Confirm
In the last post in this series, we began considering the bgp code that handles the open message that begins moving a new peer to open confirmed state. This is the particular bit of code of interest—
case BGPEventBGPOpen:
st.fsm.StopConnectRetryTimer()
bgpMsg := data.(*packet.BGPMessage)
if st.fsm.ProcessOpenMessage(bgpMsg) {
st.fsm.sendKeepAliveMessage()
st.fsm.StartHoldTimer()
st.fsm.ChangeState(NewOpenConfirmState(st.fsm))
}We looked at how this code assigns the contents of the received packet to bgpMsg; now we need to look at how this information is actually processed. bgpMsg is passed to st.fsm.ProcessOpenMessage() in the next line. This call is preceded by the st.fsm, which means this function is going to be found in the FSM, which means fsm.go. Indeed, func (fsm *FSM) ProcessOpenMessage... is around line 1172 in fsm.go—
func (fsm *FSM) ProcessOpenMessage(pkt *packet.BGPMessage) bool {
body := pkt.Body.(*packet.BGPOpen)
if uint32(body.HoldTime) < fsm.holdTime {
fsm.SetHoldTime(uint32(body.HoldTime), uint32(body.HoldTime/3))
}
if body.MyAS == fsm.Manager.gConf.AS {
fsm.peerType = config.PeerTypeInternal—
} else {
fsm.peerType = config.PeerTypeExternal
}
afiSafiMap := packet.GetProtocolFromOpenMsg(body)
for protoFamily, _ := range afiSafiMap {
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