Mail Server Giving Different IP When Pinged At Different Times
Mar 14, 2012
When I'm pinging my mail server, it gave me different IP's at different times. As the mail server is actually owned by us, I would like to know if that is possible without the IP actually being changed by someone. This is really critical for me. I didn't mean to cross post so providing the URL of the other place where I posted..
If you'd like I may attach the screenshots for the same, but don't think that will server any purpose.
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Mar 14, 2012
When I'm pinging my mail server, it gave me different IP's at different times. As the mail server is actually owned by us, I would like to know if that is possible without the IP actually being changed by someone.
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Jul 24, 2011
I'am using ASA 5510 and I try to understand how PAT is working.I want to add a Mail Server in the LAN and a webmail using port 3000 on the server. ( webmail must be reachable from the WAN)This is my Configuration :actually LAN users access internet using NAT with one global IP ( 194.x.x.69) which is the ASA WAN interface.
WAN ----- ISP Router ---------- FW ---------- LAN -------- Mail Server + Webmail
| (25) | (3000)
194.x.x.69 192.168.1.254 192.168.1.6
I need to forward port 3000 and port 25 from outside to inside.For example, from the WAN : [URL] must be redirect toward 192.168.1.6:3000 . What is the Correct Configuration ? And what about the Inside/Outside Traffic,Is there any configuration to add ?
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May 28, 2012
i have a network setup like the image in the link(url) and am asking how to make the PC's behind the router to reach the mail server??,when i ping the ip of the server i get timeout.
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Sep 2, 2011
Only trying to have the mail server reachable via the secondary ISP link if the primary ISP link goes out. The public MX records with priority markings should make it so any outside hosts tries the first ISP address then the second ISP address if the first is unavailable. I would be using object tracking to control the default gateway in the ASA. I'm just a bit fuzzy on the NAT with a dual ISP config on single box.It shouldn't happen but... if traffic comes in on ISP2 while ISP1 is still up (and the current default gate) that traffic should return out the ISP2 interface (using the ISP2 address and avoiding asymmetric routing) since there already an existing connection present inside the ASA. Any server initiated traffic would still use the current default gateway defined via object tracking on the ASA.
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May 24, 2012
I write here to see if some kind soul can not solve my problem (which is common to seeso many people around the world). problem: I have a mail server (192.168.1.17) configured static NAT because it is accessible byPublic IP (PPP.PPP.PPP.PPP). Everything works properly from the outside, but if I get my Mail server (on port 443) from the internal network (192.168.1.xxx) there 'verse. This configuration is called Nat inside-to-inside is done by default by some SOHO routers(such as the TPLINK from 25 euros) but Cisco did not succeed. I search on the internet for 2 days without a get nowhere. PS: I have a Cisco 1801 router. (or 1941 as another router).
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Oct 30, 2012
Trying to figure this all out. I'm getting untranslated hits. I posted the config I have so far.
Code...
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Feb 8, 2012
I have configure 887 ADSL router with attached configuration. But users cant access internet properly. (Ex: yahoo and gmail mail cant access)
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Mar 10, 2013
Region : Denmark
Model : TL-MR3420
Hardware Version : V2
Firmware Version : 3.13.27 Build 121206 Rel.60215n
I have a TL-MR3420 router placed in a remote location. The internet connection is via 3G, and since the telco is shifting the IP every 24 hours, the router is configured with DDNS from no-ip.org. This is working OK most days, but sometimes the DNS fails to update. To be able to trobleshoot it, I am trying to make my router send a mail with the logfile every hour. This function seems to be easy and out-of-the-box, but it doesn't wiork. Whenever I try to mail the log I get the error message "Fail to Connect the mail server.".
It is not possible to enter another SMTP-port, so I asume the standard port 25 (like this thread). Most ISP-mail services require SSL/TLS and/or use an alternative port, so I have made my own server. This server is visible on the Internet, and I (and others) are able to connect and send mails using smtp on port 25. But, still my remote TL-MR3420 keep saying "Fail to Connect the mail server.". I have tried nearly everything, including disabling authentication and giving the IP-address of the smtp server directly instead of the URL.
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Jun 15, 2011
My mail server is not in my network, it's over internet elsewhere.After installing the ASA 5510, i can not get my mails any more.
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Oct 11, 2011
I've got some problem with my Mail Server since I've migrated to an ASA5510.Actually the server is in a DMZ with a private Ip ( 10.x.x.2) and it is translated to a Public IP ( 194.x.x.65).I use these configuration :
static (DMZ,LAN) 194.x.x.65 10.x.x.2 netmask 255.255.255.255 static (DMZ,LAN) 194.x.x.66 10.x.x.3 netmask 255.255.255.255 static (DMZ,WAN) 194.x.x.65 10.x.x.2 netmask 255.255.255.255 static (DMZ,WAN) 194.x.x.66 10.x.x.3 netmask 255.255.255.255 static (LAN,DMZ) 192.168.0.0 192.168.0.0 netmask 255.255.248.0
Some Users received in there mailbox a system administer error message :
Object : Impossible to deliver : test Your message could not be deliver to one or more of its recipients: 421 SMTP connection went away!
When they try to re sent it some times later, message is sent without problem.
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Sep 28, 2011
Just installed a RV042 with dual wan connections. Would like to make the WAN 2 (new cable modem as well) the primary connection over WAN1 (DSL), however whenever I switch from WAN1 to WAN2 in Smark Link set up, our email server will not send mail out, even though nothing is blocking the connection.
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Jan 28, 2013
RV042 router is giving out the outer certificate instead of server certificate. Outlook anywhere is failing and we are receiving certificate errors for any secure site behind this firewall. I'm not talking about remote management. I'm talking about people trying to access our web site, which is secured, and getting an error because the RV042 is giving its own SSL certificate instead of the Server's certificate. Firmware Version: 1.3.13.02-tm. I don't see any updates for that hardware. I do have it working on an RV042 with the same firmware at a different location. How do we turn that off or keep it from happening? Output from a test site Attempting to resolve the host name xxxx in DNS.The host name resolved successfully. Additional DetailsTesting TCP port 443 on host xxxx to ensure it's listening and open. The port was opened successfully. Testing the SSL certificate to make sure it's valid. The SSL certificate failed one or more certificate validation checks. Test Steps ExRCA is attempting to obtain the SSL certificate from remote server xxxx on port 443. ExRCA successfully obtained the remote SSL certificate. Additional Details Remote Certificate Subject:
SN=California, L=Irvine, C=US, O="Cisco-Linksys, LLC", OU=RV042, CN=68:ef:bd:b8:0f:78, Issuer: SN=California, L=Irvine, C=US, O="Cisco-Linksys, LLC", OU=RV042, CN=68:ef:bd:b8:0f:78.Validating the certificate name. Certificate name validation failed. Tell me more about this issue and how to resolve it Additional Details Host name xxxx doesn't match any name found on the server certificate SN=California, L=Irvine, C=US, O="Cisco-Linksys, LLC", OU=RV042, CN=68:ef:bd:b8:0f:78.
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Nov 28, 2012
Just installed RV042 router. And it's giving out router certificate instead of server certificate so people who are trying to access our secured server are getting errors. I'm not talking about remote management. I'm talking about people trying to access our web site, which is secured, and getting an error because the RV042 is giving its own SSL certificate instead of the Server's certificate. How do we turn that off or keep it from happenning?
The RV042 firm version is v4.0.0.07-tm (Aug 19 2010 19:19:50)
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Dec 28, 2012
For the last several months, but progressively worse, my internet drops due to the DNS Server not responding. This happens across my whole network and the only fix I can come up with is to reset the router every time it does this. At this point I am thinking a new router is in order (but do not have the money atm), I am using a D-Link DIR-625 V. C1 Firmware 3.08 router and a Motorola SB6120 modem. Is there another permanent fix for this problem is or my router on it's last legs? Would setting a new DNS Server on my router work?
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Jan 26, 2013
I am running ubuntu 12.04, with apache2.My router configuration is set to forward port 80 to my local IP.The problem is I can only access the server as local host. Else it times out (from devices using the same network). I do not have sfw firewall enabled, neither shore firewall.
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Nov 20, 2012
I replaced a similar router from a competing company with the AC900 N900 router. I open Live Mail (IMAP) and keep it open during the day. Since switching over, when I periodically look at email on Live Mail, I frequently get a "Windows Live Mail" message saying "Your server unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity." I have never received this message from either one of the previous routers - LinkSys, Netgear.
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Jan 30, 2011
I have a 3911 router with a 1242 AP. The problem that I have is that when the user is trying to connect, the user get the OS Ip address 169.254.168.154 and I see that when I do the "show dot11 association" command, but when I do sh ip dhcp binding on the router I see
172.19.9.141 0100.18de.74db.14 Jan 31 2011 11:14 AM Automatic
The router is seeing as if the router gave the ip address to the user, but the reality the user was assigne the OS ip address 169. I did "debug ip dhcp server events" and I got the following:
Jan 31 11:09:06.752 EST: DHCPD: Seeing if there is an internally specified pool class:Jan 31 11:09:06.756 EST: DHCPD: htype 1 chaddr 0100.18de.74db.14
Jan 31 11:09:06.756 EST: DHCPD: remote id 020a00000a58218400000000Jan 31
[Code].....
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Oct 3, 2012
I have a RV042 router. The problem that I am having with it is that the DHCP is giving out the wrong Default Gateway and DNS Server. There is no option to change the DHCP server IP on any of the settings pages on the router. I am begining to think that there might not be a way to do it. I see that there is an option for the DNS under the DHCP page but the Public IP that is being handed out is not the one on that page. I also have 2 WAN connections hooked up as well a DSL link and a Cable link (the cable link is the primary one).
The following information is provided in an effort to resolve this issue:
IP of Router 10.0.0.2
IP of DHCP Server (the one that is being handed out):10.0.0.1
IP of DNS (the one that is being handed out): 10.0.0.11
What I want to it be.
IP of Router: 10.0.0.2
IP of DHCP 10.0.0.2
IP of DNS 10.0.0.2
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Nov 15, 2012
I am trying to convert two Aironet 1141n access points to autonomous stand-alone units. I have connected the console cable and I can see the unit giving information in the console window, but I cannot type any commands. When I try to get the unit to upload the c1140-k9w7-tar.default file by holding the mode button in for 20-30 seconds, it shows it is examining the file, and then states that the connection to the tftp server has timed out. My windows firewall is off, the interface is configured as 10.0.0.2 255.255.255.0 and the tftp server is showing that.
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Feb 20, 2013
I have a asa 5510 vpn client groups configured and connected to the internal network DHCP server stops giving network service dhcp and the network goes down.
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Dec 26, 2012
It is showing 24.93.232.1. I reset my router and now I cannot get a wireless connection.
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Jan 11, 2011
Windows 2003 R2 Server machine cannot be pinged, not XP? I'm running a highly modified version of Windows 2003 R2 to make use of an old PC. It connects beautifully to a Verizon router (I can browse the Internet), but I can't figure out how to share folders on my network. I have a Macbook and Win7 machine and both cannot see this old PC on the network. I have tried to ping the old PC from my Win7 machine, and it will only timeout. Below is some relevant output from the old PC
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:Documents and SettingsAdministrator>nbtstat -n
Wireless Network Connection:
Node IpAddress: [192.168.1.6] Scope Id: []
[code]...
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Feb 23, 2011
I can connect to the free wireless with no problem on my company laptop. Last night, I was using my personal laptop (as I have been for 2 weeks) on the wireless internet when I suddenly lost connection. In the Network and Sharing center of Windows Vista it shows a connection to the router but an 'X' between the router and the internet. When I run the diagnostic I get "Cannot communicate with primary DNS server (4.2.2.1)" The it says "Network diagnostics pinged the remote host but did not receive a response".
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Sep 11, 2012
We have a 2960 switch (switch2), whose Management IP cannot be reached/Ping'd. Could not Ping . We have checked the following, but still no clue on the root cause. Haven't tried a reboot yet.
Topology.
All switches are cascaded through trunk and allows all v lan's.
L3switch1 <-> switch1 <-> switch2 <-> switch3 <-> L3switch2
Switch 2 has correct ARP entries for the other switches that we try to ping.Mac address table is fine.Switches other than Switch 2 has proper ARP and Mac entries.This Mgmt v lan is not pruned across any trunks. (we are able to ping switch3 crossing switch2 when tried from switch1)Switches are running PVST and convergence is fine.No access list to deny the traffic.Tried sut/no shut on the V lan interface.
But still switch 2 could not be reached.
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Mar 27, 2012
I have a problem with siemens industrial profinet apparatous and my Cat2960.
Siemens host can be pinged without any problem but they are not able to do any other kind of traffic. If i look at the interface I can find that all ingress packet are UNKNOWN DROPPED.
I found a document where si explained that "probably" siemens host are using packet with 802.1p header and vlan 0.
I tried the following tests:
1) port in access mode - failed
2) port in trunk mode with native vlan - failed
3) port in access mode with voice vlan - failed
4) port in acess-mode with voice vlan dot1p - failed
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Oct 26, 2012
I have a public ip (I didn't ask for it, but I have it). Ping worked, including ssh, etc. No it doesn't work anymore.
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Jan 23, 2011
When I click on my mailbox on my yahoo page, it asks me to sign in, but when I click on sign in nothing happens
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May 30, 2012
I discovered that an Ad. mail had been sent without my knowlwdge from my computer to all of my "Hotmail" contacts which I had built up over twelve years of computing. I discovered this when I found a substantial number in my 'inbox' as delivery failures.I do not have wi-fi or wireless and there is no other with access to my computer.How was this possible as it is most embarrassing to say the least of it. All of the mails are links to a website or websites that promote "earning money from home."
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Apr 14, 2013
I know that 255.255.255.255 is the broadcast address to send message to all hosts that are in LAN. what i want here is, i want to send a mail to all hosts using this address.
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Jul 2, 2011
I Get a mail From Someone which claims which says that they are forwarding a mail from someone How do i find out that the mail i have received s from that original person onlyBecause that person is not replying to me directlyHe forwards mail to a second person{assume} and that person forward me the mail::how do i find out that the mail i have got is really originated from that first person only
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