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Checkpoint doesn't allow WAN and LAN on the same subnet?
Hi, I am having a hard time to set up the Checkpoint firewall, and it looks to me that Checkpoint doesn't allow WAN and LAN interface on the same subnet. The WAN IP is aaa.aa.aaa.1, while IPs of the web sites/the servers are between aaa.aa.aaa.4 to aaa.aa.aaa.127. We were using WatchGuard...- leung
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- Replies: 10
- Forum: Security, hacker detection & forensics
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what are the possible reason for mails being rejected?
Hi, We host our own mail server (IMail on Windows NT) internally. Everyday, we send several emails from the system to each of our members. Evidently, for some members, 1 or 2 out of the several emails are being bounced back as undeliverables daily, for example, 2 out of 7 came back, while 5... -
DNS doesn't return PTR
Hi, Hope someone will provide a solution, as this is very important to us for sending emails. I have set up the PTR records in the in-addr.arpa zone for our domains. When you request the reverse lookup outside of our network, the DNS wouldn't return the IP for you. It appears that no PTR... -
PTR record of the mail server.
Hi, I have just found that some emails are being rejected by other mail servers because the PTR record of our mail server doesn't match the MX record in the DNS. However, I have checked the DNS, and I am sure that I have set the PTR and MX with the correct value. Why do some mail servers see... -
Doesn't obtain the new IP when pinging the machine
Hi, We have changed the IP addresses of our network because of a new ISP. Our mail server (mail.xxxx.com) used to have the IP address of 209.20.100.2, and we have changed to 208.30.212.2. We also changed the records in the DNS accordingly. However, whenever we ping mail.xxxx.com at the mail...
