Whose problem?
Something bit odd happened today with my humble but small server. I'm not sure what, but I hope somebody could help, because I hope it doesnt't happen again. My connection basically is a ADL connection. I have private address in local ISP network to which I connect by Nokia M1122 ADSL router . I have fixed IP but there is NAT before big bad internet. I have Debian potato 2.2.19 with ipchains as a firewall. I've enabled with ICMP traceroute and other ICMP's that are required but not ECHO. I wasn't doing anything special but I noticed suddenly that lot of pings were coming at my server as firewall logs arrived. No matter otherwise, but I also noticed that connection to internet was not working properly. DNS queries to my ISP didn't work. Nslookup for example didn't work because no DNS server couldn't be found. Looking Ethreal, I could see that traffic was coming to server. This state of affairs lasted maybe 30-50 minutes or maybe more. I wasn't counting time, I was wondering was I under attack. After time, things returned to normal. Not sure why, I did add some specific rules to firewall concerning the domain where pings came, but as I was already denying them, so I'm not sure did it help. There came pings later too but nothing happened because them. As I contacted the origin of these pings, I was referred here: http://www.internap.com/measurements/readme.html Now, what did happen? Unfortunately I didn't know back then how to look my routers status so I don't have logs about it. Far as I can tell, traffict came to my server, but I was unable to send. Besides those pings, I can't figure anything exceptional that would have happened. Certainly I didn't do anything out of ordinary. Was fault in router, Debinan or somehow misconfigured firewall ? I'd add that that I rarely have anykind of problems with connectivity to internet. Antti Antti My PGP public key: http://linux.tola.org/~chicken/antti_pgp.txt -- Sex, rags and rock'n roll! -- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Reasons why sending with Exim can be slow?
What are they? Above apply only while sending from local network. It's not a hosts, problem and I don't run it from inetd. No other service has similar problems. I even reinstalled exim again. It's not fault on OS's on local computer(unless it affects only port 25) as I have 98/2000 on same computer, and both of them have same problem with mail. All networking otherwise works perfectly from LAN to email server. Exim.conf is same as before, I even recopied from backups my old one to be sure. I'm bit puzzled. Antti My PGP public key: http://linux.tola.org/~chicken/antti_pgp.txt -- Sex, rags and rock'n roll! -- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Reasons why sending with Exim can be slow?
At 04:58 1.8.2001, you wrote: On Wed, Aug 01, 2001 at 12:40:21AM +0300, Antti Tolamo wrote: All networking otherwise works perfectly from LAN to email server. Exim.conf is same as before, I even recopied from backups my old one to be sure. Almost sounds like exim is trying to verify hostnames and IPs. Is this what you want to happen. If so, came the machine properly reach a name server? bob Yes it can. And like I said, all other networking(like web browsing) works perfectly and mail sending works flawessly from server. Curiously, I went to sleep and during night the whole problem disappereaded! I rebooted windows computer before I started to ask about problem, tried two diffren OS's, looked all settings linux server and just got perpexled. Has this something to do with conjuction of stars ??? But this is not first time similar has happened. By year of experience of stable potato, it seems that about once a year networking connections mysteriously start to crawl and then revert back to normal after a while. This time problem wasn't big. Last time all traffic started to crawl big time. I have suspicion it has something to do with potato networking. First thought would be to find problems in Windows. But somehow I've had some minor problems with from potato elsewhere too. I atleast remember having some curious problems with potato network interface that conneects to internet(I use masq). Potato really stable to use, but I've got impression that sometimes it has some curious, minor problems with networking that go away after a while(or then I just have lot of problematic hardware). Or is it normal with servers? Antti My PGP public key: http://linux.tola.org/~chicken/antti_pgp.txt -- Sex, rags and rock'n roll! -- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: exim and relaying
At 04:58 1.8.2001, you wrote: On Tue, Jul 31, 2001 at 09:15:01PM -0400, Peter Billson wrote: Is there a way to permit relaying some hosts only if the From: line is local? I mean, relay *.edu.uy only if From: *@fcien.edu.uy. Do you mean to accept the mail regardless of where it *actually* comes from as long as the From line *says* that it comes from edu.uy? That would be bad. Nope. Relay .edu.uy domain only if the sender claims to be any [EMAIL PROTECTED] It is a mix of Sendmail's relay_local_from .AND. relay_hosts = .edu.uy -- Carlos Barros. Have you looked at http://www.exim.org/exim-html-3.20/doc/html/spec.html a sender_address_relay option? If understood correclty, if you combine that hosts_accept_relay_, doesn't it drive the same thing? Antti Antti My PGP public key: http://linux.tola.org/~chicken/antti_pgp.txt -- Sex, rags and rock'n roll! -- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Little Exim questions
I happen to have exim mailer for personal use, and I'm wondering couple things. First, relaying mails through it seems somewhat slow. I don't get bundles of mail all a time and I've used sendmail where sending seemed to be faster. Any reasons why it might be slower or how to get it faster in this respect? Another thing, stopping and starting exim doesn't anymore seem to cause anykind echo when starting from console. I've re-installed it few times, but still it doesn't give any report is it started or off like before it did. Other programs do give. Anybody know reason for this kind of behaviour? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Little Exim questions
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 At 04:04 29.7.2001, you wrote: Antti Tolamo wrote: Another thing, stopping and starting exim doesn't anymore seem to cause anykind echo when starting from console. I've re-installed it few times, but still it doesn't give any report is it started or off like before it did. Other programs do give. Anybody know reason for this kind of behaviour? Just to check, do you mean: /etc/init.d/exim start This may not echo anything if exim is started from inetd. In this case, the script exits silently. See about 4 lines down in /etc/init.d/exim . Also grep smtp /etc/inetd.conf to see if smtpd is commented out HTH -- Sanjeev Gupta Brainbench Linux MVP Thanks. Solved all my problems at once. So far as I've installed exim, it never has been set to use inetd, so I didn't guess to look for that. Antti Antti My PGP public key: http://linux.tola.org/~chicken/antti_pgp.txt - -- Sex, rags and rock'n roll! - -- -BEGIN PGP SIGNATURE- Version: PGPfreeware 7.0.3 for non-commercial use http://www.pgp.com iQA/AwUBO2OP+2VO2H2MX1wvEQI88QCeIYmSrywzGIUaGNIJ+0hUe0rYxpQAnRbM YbzdzOmyq4kR4kyWIl079PY7 =1Hb/ -END PGP SIGNATURE- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: My ISP Proxy and ipchains
At 13:00 27.1.2001, you wrote: Antti this is not normall ip chains behavior. You should have full use of services from your local network if your gateway box is setup correctly. ipchains on this box should have a forwarding rule along the lines of ipchains -A forward -i ppp0 -j MASQ Well, I have following and it works just fine: IPCHAINS -A forward -s 192.168.1.0/24 -d $Any -i eth0 -j MASQ I have Nokia M1122 ADSL router. changing the "ppp0" for the adsl interface name (gateway interface) The other thing to do is enable ip forwarding in networking setup . -Matt Has been done long time. Masq doens't work without it. Far as I can tell, everything works just fine with Masq, except problem with Proxy and with some forms that send information. It is not browser problem because Netscape and IE both have it. With previous ISP who had transparent proxy, problem didn't exist. But like I said, proxy it works without Masq just fine, so I'm not pointing to ISP yet. Antti - Original Message ----- From: "Antti Tolamo" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, January 26, 2001 7:24 AM Subject: My ISP Proxy and ipchains Hello, I have Debian 2.2 potato that works as a server for my small Windows homenetwork. I use with potato ipchains to do IP masquerade and a firewall. I have ADSL connection to net. My problem is this: My ISP proxy works well - except if I connect to it through masquerading from local network. Then webmail forms and similar don't work anymore. I can't for example send mail. Otherwise through Squid or directley from Linux everything works like it should. Fixing firewall rules does not make any diffrence. Is this normal ipchains masquerade behaviour or I'm missing something? Regards, ANtti -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
