There are only few PCs connected to ZyWALL 110, but the number of active sessions is almost at the limit.

Scenario

When I logged in to the device, I found that the number of active sessions was almost at the limit,

But when I go to the monitor page, only three client on the ZW110,

How to check where do these session come from?

Step

1.SSH/console access to device.

2. Use this CLI to dump the conntrack on the ZW

     Router> debug system show conntrack

3.Check the IP address to find out who keep create conntrack through ZW.

4.When you found which specific IP address keeps flooding the network, power off the PC and then monitor the ZW again.

We saw this kind of contrack kept showing in the ZyWALL

tcp      6 115 SYN_SENT src=10.10.10.23 dst=AA.AA.AA.AA sport=22372 dport=80 packets=1 bytes=985 [UNREPLIED] src=XX.XX.XX.XX dst=OO.OO.OO.OO sport=80 dport=22372 packets=0 bytes=0 mark=0 use=2

So we power off that PC (10.10.10.23) then the session on the ZW decrease from 79878 to 217 directly.

How to configure ownCloud for remote access via myZyXELcloud?

Scenario

How to configure ownCloud for remote access via myZyXELcloud?

Step

• Topology

• Install ownCloud and myZyXELcloud-Agent from the Package Management.
• Log into the NAS by  using a  web browser

• ​Select the administrator logo to  access advanced setting  of the ownCloud and myZyXELcloud-Agent package.

• Click System Setting > Firmware/Packages > Package.

• Click Retrieve List From Internet, select ownCloud and myZyXELcloud-Agent packages from the list. Click theInstall/Upgrade button.

• After installing  myZyXELcloud-Agent, click Application > myZyXELcloud-Agent to configure an account.

• Click the provided myZyXELcloud-Agent link to go to the myZyXELcloud-Agent login page. Enter your account information or use your  Facebook or Google account to log into the NSA520/540.

What is the effect of default user session limit in N-4100 (Hotspot) and how/when to adjust it?

Model Number: ZyXEL N-4100

Problem 

Sometimes network traffic drop constantly or even unable to access website while browsing, no matter from LAN or WLAN

Solution

It is caused by default user session limit of N4100, which is 128

You can adjust it according to your network utilization policy to match specific needs

Said symptom is that N4100 has running out of sessions, the ping ICMP packets will not get response from 8.8.8.8.

If similiar phenomenon happens, please adjust user session, it can ease the symptom

Procedure

The N4100 is at factory default setting

GW------------------N4100---------[Ethernet or WLAN]----------------PC

To browse websites and ping 8.8.8.8 at the same time, found ping lost very often while doing quick web browse
(switch website before page completely loading)

I can see ping loss and web page loading fail very often, sometimes the website will even become unavailable.

To ease the symptom you just need to idle the device for a moment