Cisco Routers :: RVS4000 Firewall Is Blocking Incoming Data To Ephemeral Ports
Apr 23, 2012
If I have the IP ACL firewall enabled in my RVS4000 I have trouble connecting to specific websites and also connecting to Apple's update servers. The problem appears to be that the firewall is blocking incoming data to the ephemeral ports even when they are allowed in the firewall rules. I've also tried port forwarding rules but the only thing that resolves the problem is to disable the firewall entirely, which is not the desired resolution. The firmware version is 2.0.27.
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Dec 4, 2011
I'm having an issue where our RV042 router is blocking some of our customers from sending us e-mails.I noticed thatCISCO has produced a newer version of the RVO42 V3.0 and has firmware version 4.x. can you upgrade the Linksys RV042 Hardware V 1.2 to the 4.x firmware? I have found a few articles and forums online about otherpeople having the same issue with the RV042 v1 randomly blocking, e-mail but no one ever has a solution to correct the issue.Some people have recommend to roll back to factory default and reconfigure the router as the config may by corrupt.
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Nov 8, 2012
I have an SA520 that is being used as a front end firewall. Behind it I have an IP PBX. The VOIP provides are registered and I can make outgoing calls. However It appears that the SA520 is either blocking or not routing the calls. I have opened the ports recommended by both the IP PBX and the VOIP provider. What do I need to do to make incoming calls through the SA520?
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Jul 26, 2011
My RVS4000 router freezes up when a lot of data is being pushed through the Ipsec tunnel. Let me explain in detail.
On physical location A, I have an RVS4000 router (with IP 192.168.3.1) which is permanently connected with a WRVS4400 router (with IP 192.168.1.1) on physical location B. The Ipsec tunnel has been configured using the Easy Setup Wizard of Cisco and has been working fine and stable for months. Both routers have another Ipsec tunnel with another WRVS4400 router (with IP 192.168.2.1) on physical location C, but this router does not play a role in the problem below.Recently, I’m trying to set up a remote backup service between physical location A and B using “rsync”, which uses port 873. Due to the Ipsec/VPN tunnel, I could configure rsync to move the backup files from our NAS on location A (NAS has IP 192.168.1.2) directly to location B (NAS has IP 192.168.3.2). Both NAS-devices are of the brand Synology (DS211J). The Ipsec tunnel guarantees that the data is coded and thus secure.
However, when pushing the first batch of data, I noticed that the router on the receiving end (RVS4000) freezes up after approx. 1,5h after the batch has started, which is after approx. 1 gigabyte of data has been transmitted. The connection with the WAN is lost, also the VPN-tunnel is not working, I cannot ping the device or reach its configuration pages (on 192.168.3.1), the only option is unplugging it and letting it reboot. I’m thinking the router cannot deal with the huge amount of data that needs to be decoded. I tried 5/6 times, with always the same result (timing / amount of data pushed through before router freezes varies slightly).
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Oct 15, 2012
what the maximum Data Througput can be for this router. Right now, the router is limiting my internet speed compared to what the cable modem can provide..So far, I know that when I connect my computer directly to the output of the Motorola Cable Modem and run a Speed Test on my Charter cable connection, the test shows ~ 50 Mbps for downloads and ~5 Mbps for uploads. That would be great, but I have multiple computers and need to use a router/gateway to feed my LAN. When I insert the RVS4000 router between modem and computer, the Speed Test results drop to ~ 16 Mbps for downloads and remain ~ 5 Mbps for uploads. During that test, there were no other computers online via the router. While 16 Mbps is not shabby, I would like to achieve the full value... is that possible?
Is the RVS4000 unit capable of 50 Mbps for 30 Mbps? How do I setup the router to achieve the maximum available download speed?There is a setup page for the router which has settings right now set at 50000 Kbps Upload and 60000 Kbps for Download; this implies to me that the router is capable of such speeds.
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Feb 4, 2013
I have inherited an asa 5510 whit 4GE SSM module installed. The asa runs fine, but i can not use the 4GE SSM ports. Using ASDM or console i can get and configure the gigabitethernet1/x ports but i can not get traffic on it. The ping from the console to the ip address of the Gigabitethernet1/0 is successful. On switches or hubs connected to those ports i can not see the port's mac address. The two Internal-data0/0 and Internal-data1/0 are down and i can get they up. How to configure 4GE SSM or ASA internal-data ports.
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Aug 15, 2012
The local router is behind a fiber firewall/router; the rvs4000's ext ip is thus 192.168.1.2, not visible from the net. The firewall/router is a dyn ip, with a dyn dns name mapping to it. The remote (some NetGear thing) is also dyn dns, but it is not behind a firewall.
I want to cook a vpn from the local lan subnet to the remote lan subnet.
It worked fine when both ends were NetGear.
I think it would be ok if somehow I could thell the rvs4000 that the local Security Gateway Type be just FQDN; it can't be IP+FQDN because the remote end doesn't know anything about that kind of thing; it can do IP or FQDN or a couple other confusing things.
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Apr 24, 2012
I have a RVS4000 and I am going to configure vlan in the near future. Among all other configurations sent by the internet provider company is this one :
Firewall NAT :
from x.x.2.0/24 to 0.0.0.0/24 should be NAT
from x.x.2.0/24 to x.x.0.0/21 should not be NAT
From all the other configurations, this one is not clear to me. Can this configuration be done on a RVS4000 and where can it be done.
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Sep 15, 2011
RVS4000 has default firewall rule from ANY WAN -> to ANY LAN with status Allowed. Should that be denied by default, like in RV042 or RVL200?
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Feb 16, 2012
We have had our router and remote computers set up with Quick VPN for over a year. We've had our share of problems but have worked around them.
Now, out of the blue, no one can connect to the VPN. I went in to try to do some 'troubleshooting' and the ONLY thing that allows our VPN connection to go through is to completely disable the RV016 firewall. We have too many remote users to actually start and stop the firewall everytime someone needs the VPN connection.
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Apr 5, 2013
I have a RV110W that's been in service since Dec 2012. All Everything is working fine except every month or so the firewall starts blocking all inbound traffic. It does not respond to remote management access. If I reboot the firewall (pwr off/on) everything works correctly for the next month or so and then it begins blocking all inbound traffic again. Local access to the Internet and VPN tunneling are not affected. When it's working, all my rules and port forwarding work correctly.
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Feb 22, 2012
The firewall on my RVS4000 appears to hang when ever I use Netflix. If I disable the firewall and re-enable it it works for a while and then stops again. My IP address is in the Approved Client IP Addresses so it is excluded from the URL filtering and Web reputation rules.
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Mar 12, 2012
I am trying to access a device behind my firewall that needs to use port 9000. I have completed the single port forwarding page with the exterior and internal port but I cannot access the device from outside the firewall. Yes I did check the "enabled" box
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May 3, 2012
I have problem with RVS4000 fw 1.3.3.5. When you switch the status of IPS function (turn on or turn off), firewall rules don´t work from that moment until you restart the router!
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Jun 10, 2011
I have opened the ports up on my Virgin Super Hub, and everything else in my house connected to this network can access the ports which I've opened, however just on this PC, I can't seem to open them, I've tried closing my firewall, and that didn't work either.
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Jan 24, 2013
I have an issue with virtual box as it is blocking all my ports when the adapter is set as bridged. My OS is Windows 7 and the OS I am trying to connect to is Win 2k3 Server.
I made it bridged to be on the same LAN. how I can open ports and can be able to telnet for example port 80?
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Nov 25, 2012
Blocking Ports don´t send BPDUs, but they can receive them from designated ports.Blocking ports, can it hold BPDUs?
I think that Blocking Ports only receive, analyse and then discard the BPDU.But, what happen if the blocking port receive a better o worse BPDU? in this case, must be the bpdu stored?
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Apr 25, 2012
I have a connection between switches, There are a 3560 (Gi0/37) and a 2960 (Gi0/1), the problem is in the port Gi0/37 of the 3560 switch and this is the log. [code]
I dont understand what is the problem, actually i have added the command power inline never on the port and the problem is solved, but we haven´t changed configuration.
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Mar 10, 2013
My TP-Link 8817 which is connected to my ASUS RT-N66u appears to be blocking my ports. I port forwarded on my router to set up a server. I do have the right IP and ports set up. Originally i thought it was the router but then "netMakeChannDial: err=-3000 rn_p=8050dc14" appeared in the modem log but nothing in the router log even though i turned on the "logged packets type" to Both. I have googled this error but nothing came up so I'm probably just doing something stupid. I have even tried turning off the modem firewall and SPI, but still no luck.
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Feb 21, 2013
I bought the EA6500 yesterday, to replace my E3200.Formerly, with the E3200, I was able to block applications on the router admin page, without blocking all internet access, under the "Access Restrictions" Tab. I could create access policies that allowed internet access to specific devices, while blocking port ranges/protocols for specific applicatons. while this didn't work for Skype, which jumps from one port to the other until it finds an open one, it worked perfectly for World of Warcraft. the primary target of my restrictions.in common with the old setup for the E3200, the new cloud login allows me to block internet access completely to a device. it also allows me to block websites to my heart's content, an improvement upon the old system, which stopped at four. but to my great surprise, it will not allow me to specify port blockages for specific apps for specific devices., while the new EA6500 is blessed with the added capability of actually recognizing applications by name, *it is only to give them greater priority*. the Media Prioritization tab lets you give a ton of your bandwith to specific apps, but won't let you throttle or block them. Is there some way to work around this? Some alternative firmware? again, I don't want/need to block all internet access to a particular computer. I only need to block some apps (World of Warcraft, and Skype, possibly some torrents) by closing some ports.
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Nov 15, 2011
I recently installed an RV042 v1.1 vpn router (older hardware revision but using the latest available firmware 1.3.12.19-tm) and set up VPN access with the QuickVPN client. QuickVPN requires that the HTTPS setting be enabled under the Firewall options, so I did. I then scanned our static IP with grc.com's ShieldsUP! to check for open or non-stealthed ports and discovered that ports 80 and 443 show as wide open, while port 113 is closed but not stealthed. If I disable the HTTPS setting under Firewall, then ports 80 and 443 become stealthed. Is there any way to use QuickVPN and keep these ports stealthed?
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Aug 20, 2011
having trouble to configure the Cisco SRP527w where we have two incoming VLAN's.
1. vlan1 is for internet (20mbps)
2. vlan2 is for a specific application (Specific IP Address - 10mbps)
Somehow we are unable to configure the router to enable PC's connected to the router to access both vlan based to the application specific vlan. Its always routing it through the internet.
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Sep 11, 2011
I have 2 internet connections in my office one via Verizon Fios and another one via the local cable company. On the fios connection I have an RV042 VPN router and on the Cable company connection I have an rvs4000 router, I would like to know if there is a way I can connect the 2 so I can share a printer I have on one of the 2 networks from the other network without using the VPN feature, like via an ethernet cable connected between the 2 and some kind of static route maybe?
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Oct 12, 2011
Just purchased a Cisco RV110W for our small business. We were told this was easy for us to use and secure enough for our small office and for our travelling sales staff to access our website.
We purchased 2 dedicated IP-addresses, 216.82.5.230 for access to one server, and 216.82.5.231 for access to a second server (these IP-Addresses given are just an example; not real).
These come into the single RV110W WAN port. The two servers are plugged into 2 of the 4 LAN ports.
But the WAN setup page only accepts one WAN IP-Address. So when we put in 216.82.5.230, the outside world can HTTPS into one server, but we don't know how to get them to HTTPS to the second server when the other staff uses 216.82.5.231.
In summary, how to use the RV110W admin panel to forward the HTTPS/SSL traffic from 216.82.5.230 to one server (setup internally on 192.168.10.20), and the HTTPS/SSL traffic from 216.82.5.231 to the other server (setup internally on 192.168.20.20 using the VLAN setup on this router)?
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Dec 4, 2011
Cisco RV016 Small Business Router (firmware version 4.0.4.02-tm) . We have several old RV series Linksys, and the interface seem identical to this new Cisco version so it isnt difficult to have it configured. However, I am facing issues. I cannot ping from untrust to WAN IP of the router. However pinging from trust to any IP is just fine.
I tried disabling firewall, I also created a firewall rule that allows all ICMP from ANY to ANY. I also tried All traffic from Any to Any. But still the WAN1 and WAN2 IP addresses (Multiple ISP) still does not reply to ICMP.
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Feb 14, 2013
I have a Cisco wag120n adsl modem. I am setup with a SIP provider, so all my incoming and outgoing calls use SIP.So my question is, how does my ADSL modem handle incoming SIP calls,e.g the SIP call comes in and reaches my adsl modem. Then, how does the modem find the actual port that has my ATA adaptor (analog phone) or CME router attached ? I know port forwarding would handle this, but I am not actually using any configured port forwarding rules.
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Jul 1, 2012
I'm using a SRP521W-U. I've set up a SIP account on Line 1. I would like to be able to answer incoming calls on both FXS1 and FXS2. How do I achieve that both ports will ring?
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Jun 9, 2013
We have an ASA 5505. 5505 comes with two default vlans 1&2 with each of them marked as inside & outside respectively.My query is , if i do not want to use vlans on 5505 and only want to use the Ethernet ports as pure physical layer 3 ports, is it possible?i.e. i want to assign a layer 3 ip address on eth0/0 and eth0/1 and make them as the inside & outside interfaces rather than vlans. is it possible to do away with vlans in 5505 & will it work otherwise?
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Nov 29, 2012
I need to block 4000 nodes (Ultrasurf, TOR exit nodes) and I've written a script that will ssh and copy in these objects (prob 100 at a time) into an object group and then put a blanket deny. I don't see a flood of traffic (occassional hits every other day, etc) but I was wondering what the impact would be? Can the ASA handle an object group of that size plus an ACL with it? Any way to block incoming connections from TOR/Ultrasurf?
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Mar 6, 2013
I'm new to ASA's and PIX units. I've setup a few VPN's now but know next to nothing about logging on these units. I read the config guide for the PIX, but cannot figure out how to get a log of incoming SMTP traffic going on the console.Do I need to use a SYSLOG server? I can probably set one up on my laptop.
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Mar 15, 2012
I am trying to switch out a cisco pix 501 firewall with a cisco ASA 5505 firewall. I am not very familiar with all of the commands for the firewalls and have always relied on a standard command line script that I use when building a new one. Unfortunately, my script is not working with the 5505. What I am doing wrong with the following script? I've masked public IP info with xxx.xxx.xxx and I run it right after restoring the firewall to the factory defaults. I am able to get out to the internet if I browse directly from one of the servers, but cannot access a web page when trying to browse to it from an outside network. [code]
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Dec 12, 2012
I was configure 3 interface on ASA1st - managemetn (only for management)2nd - gig0/0 is connected to internet with real IP3rd - gig0/1 is connected to local networkI was configure routed NAT to internet.But I have problem with restriction incomming traffic to inside interface (ifname is inside)but I can connect to ip address of inside interface from other ip. It is wrong and i can't understand where is my mistake.
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May 14, 2013
Is there a way to associate spare firewall ports with another port that is being used..For example...int gi 0/2 is being used currently for my web dmz. Its ip is 192.168.10.1..Is there a way for me to associate gi 0/3 with the same layer 2 as gi 0/2 ?
In my webdmz I use 2 ACE 4710 proxys in FT mode. I used a layer 2 switch to connect firewall and proxys together.
I would like to eliminate this switch if possible..and connect both 4710's (layer 2) direct to firewall.If I could make gi0/2 - 4 part of the same vlan, then I would be good to go.
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