Full List of TCP/IP Services and Servers

This page contains a directory of some of the TCP/IP services offered by IT Services, both official and unofficial. The IP name/number of the machines that offer the service together with relevant port number are also supplied.

Please send any corrections or additions through the feedback form.

1. DNS (Domain Name System)

1.1. Caching Resolvers

Server name: resolver0.dns.ox.ac.uk resolver1.dns.ox.ac.uk resolver2.dns.ox.ac.uk
Server IP number: 129.67.1.1 129.67.1.180 163.1.2.1
Port number: 53 (TCP/UDP)
Status: Official

These resolvers should be used by all client systems across the university network. Requests from the resolvers to local DNS servers (e.g. for Active Directory) will be made from the source interfaces in 163.1.2.120/29, please allow those addresses in your firewall rules.

1.2. Authoritative nameservers

Server name: auth0.dns.ox.ac.uk auth1.dns.ox.ac.uk auth2.dns.ox.ac.uk
Server IP number: 129.67.1.190 129.67.1.191 163.1.2.190
Port number: 53 (TCP/UDP)
Status: Official

If you require zone transfers to a departmental slave server, please contact hostmaster to arrange for access and for your server to receive NOTIFY messages upon updates.

 

2.WINS (Windows Internet Name Service)

Server name: dnsad5.it.ox.ac.uk dnsad4.it.ox.ac.uk
Server IP number: 129.67.241.227 129.67.226.100
Port number: 137-139 (UDP)  
Status: Official  

 

3. SMTP Relay (Simple Mail Transfer Protocol)

Server name: oxmail.ox.ac.uk
Server IP number: Round-robin of several IP addresses within the ranges 129.67.1.160/28 and 163.1.2.160/28
Port number: 25
Status: Official

Notes:

Mail servers which restrict incoming SMTP connections should allow the following netblocks if they wish to receive mail from Oxmail:

  • 129.67.1.160/28
  • 163.1.2.160/28

An alternative notation for a /28 netmask is 255.255.255.240

Clients which require an outgoing mail server to be defined should use smtp.ox.ac.uk. Mailing Lists are handled via the mail alias maillist.ox.ac.uk

 

4. SMTP Submission (Simple Mail Transfer Protocol)

Server name: smtp.ox.ac.uk
Server IP number: Round-robin of several IP addresses within the ranges 129.67.1.204/30 and 163.1.2.204/30
Port number: 587 (587 strongly advised but port 25 also possible)
Status: Official

Notes:

SMTP service for users mail clients. Allow the following outbound from your network to allow users to submit mail to smtp.ox.ac.uk

  • 129.67.1.204/30
  • 163.1.2.204/30

 

5. Remote Access Account RADIUS

Server name: radius0.oucs.ox.ac.uk radius1.oucs.ox.ac.uk radius2.oucs.ox.ac.uk
Server IP number: 129.67.1.113 163.1.2.113 129.67.1.116
Port numbers: 1812/udp for authentication, 1813/udp for accounting    
Status: Official    

Notes:

This service is used by 802.1X Authenticators that authenticate users based on the IT Services Remote Access account. Access to these servers is restricted to those registered in the 802.1X Device Registration tool. You must configure accounting to any servers that you use to authenticate against.

 

6.HTTP (Hyper Text Transfer Protocol) Proxy Cache

Server name: wwwcache.ox.ac.uk
Port number: 80 (http)
Status: Official
 

 

7.NTP (Network Time Protocol)

Server name: ntp0.ox.ac.uk ntp1.ox.ac.uk ntp2.ox.ac.uk ntp3.ox.ac.uk
IP address: 129.67.1.160 129.67.1.164 163.1.2.160 163.1.2.164
Access: all IPv4 hosts
Port number: 123
Status: Official

 

8.DHCP (Dynamic Host Configuration Protocol)

Server name: dhcp-b.ox.ac.uk dhcp-c.ox.ac.uk
Server IP number: 163.1.2.2 129.67.1.2
Port number: 67  
Status: Official  

 

9.OWL DHCP server address

Server name: lin-services.backbone.ox.ac.uk
Server IP number: 192.76.34.141
Port number: 67
Status: Official

 

 

10.eduroam DHCP server address

Server name: lin-eduroam-services.backbone.ox.ac.uk
Server IP number: 192.76.34.125
Port number: 67
Status: Official

 

12.NNTP (Network News Transport Protocol, "Usenet")

Server name: news.ox.ac.uk
Port number: 119
Status: Official

 

13.Electronic Mail

Server name: nexus.ox.ac.uk
Port number: 80/81 (http), 443 (secure-http)
Status: Official

 

14.User WWW Server

Server name: users.ox.ac.uk
Port: Accessed by FTP transfer
Status: Official

 

15.TSM Backup Server

Server name: hfs.ox.ac.uk
Ports: Accessed via dedicated client software
Status: Official

 

16.Software Mirrors

Server name: mirror.ox.ac.uk (Linux & Linux-related software)
Ports: 20/21 (ftp), 80 (http), NFS (mirror.ox.ac.uk:/public)
Status: Unofficial

 

Written by IT Services. Latest revision 16 June 2017